<PAGE>   1
                                                                   EXHIBIT 10.13



                          LOAN AND SECURITY AGREEMENT

                                 BY AND BETWEEN

                           FLEET CAPITAL CORPORATION

                                      AND

                        BAYARD DRILLING TECHNOLOGY, INC.



                             DATED:   JUNE 18, 1998

                                  $10,000,000





<PAGE>   2
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                          Page
<S>                                                                                                        <C>
SECTION 1. CREDIT FACILITY                                                                                 1
   1.1        REVOLVING CREDIT LOANS.                                                                      1
   1.2        LETTERS OF CREDIT; LC GUARANTIES                                                             2
   1.3        ALL LOANS TO CONSTITUTE ONE OBLIGATION                                                       2
   1.4        RELEASE OF TREND                                                                             2
SECTION 2. INTEREST, FEES AND CHARGES                                                                      2
   2.1        INTEREST                                                                                     2
   2.2        COMPUTATION OF INTEREST AND FEES                                                             4
   2.3        AMENDMENT FEE                                                                                4
   2.4        LETTER OF CREDIT AND LC GUARANTY FEES                                                        4
   2.5        COMMITMENT FEE                                                                               4
   2.6        SERVICING FEE                                                                                4
   2.7        AUDIT AND APPRAISAL FEES                                                                     4
   2.8        REIMBURSEMENT OF EXPENSES                                                                    4
   2.9        BANK CHARGES                                                                                 5
   2.10       LINE DEBIT FOR CHARGES                                                                       5
SECTION 3. LOAN ADMINISTRATION                                                                             5
   3.1        MANNER OF BORROWING REVOLVING CREDIT LOANS                                                   5
   3.2        PAYMENTS                                                                                     6
   3.3        APPLICATION OF PAYMENTS AND COLLECTIONS                                                      7
   3.4        LOAN ACCOUNT                                                                                 7
</TABLE>





                                       i

<PAGE>   3
<TABLE>
<S>                                                                                                        <C>
   3.5        STATEMENTS OF ACCOUNT                                                                        7
SECTION 4. TERM AND TERMINATION                                                                            8
   4.1        TERM OF AGREEMENT                                                                            8
   4.2        TERMINATION                                                                                  8
SECTION 5. SECURITY INTERESTS                                                                              9
   5.1        SECURITY INTEREST IN COLLATERAL                                                              9
   5.2        INTENTIONALLY OMITTED                                                                        9
   5.3        LIEN PERFECTION; FURTHER ASSURANCES                                                          9
   5.4        LIEN ON REALTY                                                                               10
SECTION 6. COLLATERAL ADMINISTRATION                                                                       10
   6.1        GENERAL                                                                                      10
   6.2        ADMINISTRATION OF ACCOUNTS                                                                   11
   6.3        INTENTIONALLY OMITTED                                                                        12
   6.4        ADMINISTRATION OF DRILLING RIGS                                                              13
   6.5        PAYMENT OF CHARGES                                                                           13
SECTION 7. REPRESENTATIONS AND WARRANTIES                                                                  14
   7.1        GENERAL REPRESENTATIONS AND WARRANTIES                                                       14
   7.2.       SURVIVAL OF REPRESENTATIONS AND WARRANTIES                                                   19
SECTION 8. COVENANTS AND CONTINUING AGREEMENTS                                                             19
   8.1        AFFIRMATIVE COVENANTS                                                                        19
   8.2        NEGATIVE COVENANTS                                                                           22
   8.3        SPECIFIC FINANCIAL COVENANTS                                                                 29
</TABLE>





                                       ii

<PAGE>   4
<TABLE>
<S>                                                                                                        <C>
SECTION 9. CONDITIONS PRECEDENT                                                                            29
   9.1        DOCUMENTATION                                                                                29
   9.2        NO DEFAULT                                                                                   29
   9.3        OTHER LOAN DOCUMENTS                                                                         29
   9.4        CERTIFICATE OF LIMITED PARTNERSHIP                                                           29
   9.5        PARTNERSHIP AGREEMENT                                                                        29
   9.6        ARTICLES OF INCORPORATION; OPERATING AGREEMENT                                               30
   9.7        GOOD STANDING CERTIFICATES                                                                   30
   9.8        OPINION LETTERS                                                                              30
   9.9        INSURANCE                                                                                    30
   9.10       DOMINION ACCOUNT                                                                             30
   9.11       REPRESENTATIONS                                                                              30
   9.12       NO LITIGATION                                                                                30
   9.13       EVIDENCE OF PERFECTION AND PRIORITY OF LIENS IN COLLATERAL                                   30
   9.14       CIT INTERCREDITOR AGREEMENT                                                                  30
   9.15       NO MATERIAL ADVERSE CHANGE                                                                   31
SECTION 10. EVENTS OF DEFAULT; RIGHTS AND REMEDIES ON DEFAULT                                              31
   10.1       EVENTS OF DEFAULT                                                                            31
   10.2       ACCELERATION OF THE OBLIGATIONS                                                              33
   10.3       OTHER REMEDIES                                                                               33
   10.4       REMEDIES CUMULATIVE; NO WAIVER                                                               35
SECTION 11. MISCELLANEOUS                                                                                  35
   11.1       POWER OF ATTORNEY                                                                            35
</TABLE>





                                      iii

<PAGE>   5
<TABLE>
  <S>         <C>                                                                                          <C>
   11.2       INDEMNITY                                                                                    36
   11.3       MODIFICATION OF AGREEMENT; SALE OF INTEREST                                                  37
   11.4       SEVERABILITY                                                                                 37
   11.5       SUCCESSORS AND ASSIGNS                                                                       38
   11.6       CUMULATIVE EFFECT; CONFLICT OF TERMS                                                         38
   11.7       EXECUTION IN COUNTERPARTS                                                                    38
   11.8       NOTICE                                                                                       38
   11.9       LENDER'S CONSENT                                                                             39
   11.10      CREDIT INQUIRIES                                                                             39
   11.11      TIME OF ESSENCE                                                                              39
   11.12      ENTIRE AGREEMENT; APPENDIX A AND EXHIBITS  AND SCHEDULES                                     39
   11.13      INTERPRETATION                                                                               40
   11.14      GOVERNING LAW; CONSENT TO FORUM                                                              40
   11.15      WAIVERS BY BORROWER                                                                          41
   11.16      ORAL AGREEMENTS INEFFECTIVE                                                                  41
   11.17      NONAPPLICABILITY OF CHAPTER 346 OF THE TEXAS FINANCE CODE                                    41
   11.18      CERTAIN MATTERS OF CONSTRUCTION                                                              42
   11.19      RELEASE                                                                                      42
   11.20      AMENDMENT AND RESTATEMENT                                                                    42
   11.21      JOINDER                                                                                      42
</TABLE>





                                       iv

<PAGE>   6


                                                                   Exhibit 10.13

                AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT

         THIS AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT is made this
18th day of June, 1998, by and between FLEET CAPITAL CORPORATION ("Lender"), a
Rhode Island corporation with an office at 2711 North Haskell Avenue, Suite
2100, LB 21, Dallas, Texas 75204, and Bayard Drilling Technologies, Inc., a
Delaware corporation ("Bayard" or "Borrower"), with its chief executive office
and principal place of business at 4005 N.W. Expressway, Oklahoma City,
Oklahoma 73116 and joined in by Bayard Drilling, L.P., a Delaware limited
partnership ("Drilling LP") for the purposes described in Section 11.21 below
(the "Agreement").  Capitalized terms used in this Agreement have the meanings
assigned to them in Appendix A, General Definitions.  Accounting terms not
otherwise specifically defined herein shall be construed in accordance with
GAAP consistently applied.

SECTION 1.       CREDIT FACILITY

         Subject to the terms and conditions of, and in reliance upon the
representations and warranties made in, this Agreement and the other Loan
Documents, Lender agrees to make a total credit facility of up to $10,000,000
available upon Borrower's request therefor, as follows:

         1.1     Revolving Credit Loans.

                 1.1.1    Loans and Reserves.  Lender agrees, during the term
of this Agreement and for so long as no Default or Event of Default exists, to
make Revolving Credit Loans to Borrower from time to time, as requested by
Borrower in the manner set forth in Section 3.1.1 hereof, up to a maximum
principal amount at any time outstanding equal to the Borrowing Base.  Lender
shall have the right to establish reserves in such amounts, and with respect to
such matters, as Lender shall deem necessary or appropriate, against the amount
of Revolving Credit Loans which Borrower may otherwise request under this
Section 1.1.1, including, without limitation, with respect to (i) any sums
chargeable against Borrower's Loan Account as Revolving Credit Loans under any
section of this Agreement; (ii) amounts owing by Borrower and/or Drilling LP to
any Person to the extent secured by a Lien on, or trust over, any Property of
Borrower and/or Drilling LP other than the CIT Debt; (iii) all amounts of past
due rent or other charges owing at such time by Borrower and/or Drilling LP to
any landlord of any premises where any of the Collateral is located; and (iv)
such other matters, events, conditions or contingencies as to which Lender, in
its reasonable judgment, determines reserves should be established from time to
time hereunder.

                 1.1.2    Use of Proceeds.  The Revolving Credit Loans shall be
used solely for general corporate purposes and capital needs of the Borrower
and its Subsidiaries, in a manner consistent with the provisions of this
Agreement and Applicable Law.  In no event shall any proceeds of any Revolving
Credit Loans be used to purchase or to carry, reduce, retire or refinance any
Indebtedness incurred to purchase or carry any margin stock (within the meaning
of Regulations G or U of the Federal Reserve Board).


                                      1
<PAGE>   7
         1.2     Letters of Credit; LC Guaranties.  Lender agrees, for so long
as no Default or Event of Default exists and if requested by Borrower, to (i)
issue its, or cause to be issued by its Affiliates, standby Letters of Credit
for the account of Borrower or (ii) execute LC Guaranties by which Lender or
its Affiliates shall guaranty the payment or performance by Borrower of its
reimbursement obligations with respect to standby Letters of Credit, provided
that the LC Amount at any time shall not exceed $2,000,000.  No Letter of
Credit or LC Guaranty may have an expiration date that is after the last day of
the Original Term.  Any amounts paid by Lender under any LC Guaranty or in
connection with any Letter of Credit shall be treated as Revolving Credit
Loans, shall be secured by all of the Collateral and shall bear interest and be
payable at the same rate and in the same manner as Revolving Credit Loans.

         1.3     All Loans to Constitute One Obligation.  All Loans shall
constitute one general obligation of Borrower, and shall be secured by Lender's
security interest in and Lien upon all of the Collateral, and by all other
security interests and Liens heretofore, now or at any time or times hereafter
granted by Borrower or any Subsidiary to Lender.

         1.4     Release of Trend.  Trend is hereby released from its
obligations under the Original Loan Agreement.  Such release shall not affect
Trend's obligations as Guarantor or party to a Security Agreement.

SECTION 2.       INTEREST, FEES AND CHARGES

         2.1     Interest.

                 2.1.1    Rates of Interest.  The outstanding principal amount
of the Loans shall bear interest at a fluctuating rate per annum equal to the
lesser of (a) one and one-half percent (1.5 %) above the Base Rate (the
"Applicable Annual Rate") and (b) the Maximum Legal Rate.  The rate of interest
applicable to all Loans shall increase or decrease by an amount equal to any
increase or decrease in the Base Rate, effective as of the opening of business
on the day that any such change in the Base Rate occurs.

                 2.1.2    Default Rate of Interest.  Upon and after the
occurrence of an Event of Default, and during the continuation thereof, the
principal amount of all Loans shall bear interest at a rate per annum equal to
the lesser of (a) two percent (2.00%) above the Applicable Annual Rate and (b)
the Maximum Legal Rate.

                 2.1.3    Maximum Interest.  (A)  Notwithstanding anything to
the contrary in this Agreement or otherwise, (i) if at any time the amount of
interest computed on the basis of an Applicable Annual Rate or a Default Rate
would exceed the amount of such interest computed upon the basis of the maximum
rate of interest permitted by applicable state or federal law in effect from
time to time hereafter (the "Maximum Legal Rate"), the interest payable under
this Agreement shall be computed upon the basis of the Maximum Legal Rate, but
any subsequent reduction in such Applicable Annual Rate or Default Rate, as
applicable, shall not reduce such interest thereafter payable hereunder below
the amount computed on the basis of the Maximum Legal Rate until the aggregate
amount of such interest accrued and payable under this Agreement





                                       2
<PAGE>   8
equals the total amount of interest which would have accrued if such interest
had been at all times computed solely on the basis of an Applicable Annual Rate
or Default Rate, as applicable; and (ii) unless preempted by federal law, an
Applicable Annual Rate or Default Rate, as applicable, from time to time in
effect hereunder may not exceed the applicable "annual ceiling" as defined in
Chapter 303, Optional Interest Rate Ceilings of the Texas Finance Code.  If the
applicable state or federal law is amended in the future to allow a greater
rate of interest to be charged under this Agreement than is presently allowed
by applicable state or federal law, then the limitation of interest hereunder
shall be increased to the maximum rate of interest allowed by applicable state
or federal law as amended, which increase shall be effective hereunder on the
effective date of such amendment, and all interest charges owing to Lender by
reason thereof shall be payable in accordance with Section 3.2.2 hereof.

                          (B)     Excess Interest.  No agreements, conditions,
provisions or stipulations contained in this Agreement or any other instrument,
document or agreement between Borrower and Lender or default of Borrower, or
the exercise by Lender of the right to accelerate the payment of the maturity
of principal and interest, or to exercise any option whatsoever contained in
this Agreement or any other Loan Document, or the arising of any contingency
whatsoever, shall entitle Lender to  contract for, charge, or receive, in any
event, interest exceeding the Maximum Legal Rate.  In no event shall Borrower
be obligated to pay interest exceeding such Maximum Legal Rate and all
agreements, conditions or stipulations, if any, which may in any event or
contingency whatsoever operate to bind, obligate or compel Borrower to pay a
rate of interest exceeding the Maximum Legal Rate, shall be without binding
force or effect, at law or in equity, to the extent only of the excess of
interest over such Maximum Legal Rate.  In the event any interest is contracted
for, charged or received in excess of the Maximum Legal Rate ("Excess
Interest"), Borrower acknowledges and stipulates that any such contract,
charge, or receipt shall be the result of an accident and bona fide error, and
that any Excess received by Lender shall be applied, first, to reduce the
principal then unpaid hereunder; second, to reduce the other Obligations; and
third, returned to Borrower, it being the intention of the parties hereto not
to enter at any time into a usurious or otherwise illegal relationship.
Borrower recognizes that, with fluctuations in the Base Rate and the Maximum
Legal Rate, such a result could inadvertently occur.  By the execution of this
Agreement, Borrower covenants that (i) the credit or return of any Excess
Interest shall constitute the acceptance by Borrower of such Excess Interest,
and (ii) to the extent permitted by law, Borrower shall not seek or pursue any
other remedy, legal or equitable, against Lender, based in whole or in part
upon contracting for, charging or receiving of any interest in excess of the
maximum authorized by applicable law.  For the purpose of determining whether
or not any Excess Interest has been contracted for, charged or received by
Lender, all interest at any time contracted for, charged or received by Lender
in connection with this Agreement shall be amortized, prorated, allocated and
spread in equal parts during the entire term of this Agreement.

                          (C)   Incorporation by this Reference.  The
provisions of Section 2.1.3(B) shall be deemed to be incorporated into every
document or communication relating to the Obligations which sets forth or
prescribes any account, right or claim or alleged account, right or claim of
Lender with respect to Borrower (or any other obligor in respect of Obligations
including, without limitation, Drilling LP), whether or not any provision of
Section 2.1.3(B) is





                                       3
<PAGE>   9
referred to therein.  All such documents and communications and all figures set
forth therein shall, for the sole purpose of computing the extent of the
Obligations of Borrower (or any other obligor) asserted by Lender thereunder,
be automatically re-computed by Borrower or any such obligor, and by any court
considering the same, to give effect to the adjustments or credits required by
Section 2.1.3(B).

         2.2     Computation of Interest and Fees.  Interest, Letter of Credit
and LC Guaranty fees and commitment fees hereunder shall be calculated daily
and shall be computed on the actual number of days elapsed over a year of 360
days.  For the purpose of computing interest hereunder, all items of payment
received by Lender shall be deemed applied by Lender on account of the
Obligations (subject to final payment of such items) one (1) Business Day after
receipt by Lender of such items in Lender's account located in Atlanta,
Georgia, and Lender shall be deemed to have received such items of payment on
the date specified in Section 3.3 hereof.

         2.3     Amendment Fee.  Borrower shall pay to Lender, on the Amendment
Date, an amendment fee in the amount of $20,000.

         2.4     Letter of Credit and LC Guaranty Fees.  Borrower shall pay to
Lender for standby Letters of Credit and LC Guaranties of standby Letters of
Credit, two percent (2.00%) per annum of the aggregate face amount of such
Letters of Credit and LC Guaranties outstanding from time to time during the
term of this Agreement, plus all normal and customary charges associated with
the issuance thereof, which fees and charges shall be deemed fully earned upon
issuance of each such Letter of Credit or LC Guaranty, shall be due and payable
on the first Business Day of each month and shall not be subject to rebate or
proration upon the termination of this Agreement for any reason.

         2.5     Commitment Fee.  Borrower shall pay to Lender a commitment fee
equal to one-half of one percent (.5%) per annum of the amount by which the
Average Monthly Revolving Credit Loan Balance is less than the Total Credit
Facility.  The commitment fee shall be payable monthly, in arrears, on the last
day of each calendar month hereafter.

         2.6     Servicing Fee.  Borrower shall pay to Lender an annual
servicing fee of  $20,000.  This servicing fee shall be paid in equal
installments of $5,000, payable on the first day of each April, July, October,
and January thereafter.

         2.7     Audit and Appraisal Fees.  Borrower shall reimburse Lender for
all actual out-of-pocket costs and expenses incurred by Lender in connection
with audits and appraisals of Borrower and/or any Subsidiary's books and
records and such other matters as Lender shall deem appropriate.  All such
out-of-pocket expenses shall be payable on demand.

         2.8     Reimbursement of Expenses.  If, at any time or times
regardless of whether or not an Event of Default then exists, Lender incurs
reasonable legal expenses or any accounting expenses or any other costs or
out-of-pocket expenses in connection with (i) the negotiation and preparation
of this Agreement or any of the other Loan Documents, any amendment of or
modification of this Agreement or any of the other Loan Documents, or any sale
or attempted





                                       4
<PAGE>   10
sale of any interest herein to any other Person; (ii) the administration of
this Agreement or any of the other Loan Documents and the transactions
contemplated hereby and thereby; (iii) any litigation, contest, dispute, suit,
proceeding or action (whether instituted by Lender, Borrower or any other
Person) in any way relating to the Collateral, this Agreement or any of the
other Loan Documents or Borrower's or any Loan Party's affairs; (iv) any
attempt to enforce any rights of Lender against Borrower or any other Person
which may be obligated to Lender by virtue of this Agreement or any of the
other Loan Documents, including the Account Debtors; or (v) any attempt to
inspect, verify, protect, preserve, restore, collect, sell, liquidate or
otherwise dispose of or realize upon the Collateral; then all such legal and
accounting expenses, other costs and out of pocket expenses of Lender shall be
charged to Borrower.  All amounts chargeable to Borrower under this Section 2.8
shall be Obligations secured by all of the Collateral, shall be payable on
demand to Lender and shall bear interest from the date such demand is made
until paid in full at the rate applicable to Revolving Credit Loans from time
to time.  Borrower shall also reimburse Lender for expenses incurred by Lender
in its administration of the Collateral to the extent and in the manner
provided in Section 6 hereof.

         2.9     Bank Charges.  Borrower shall pay to Lender, on demand, any
and all normal and customary fees, costs or expenses which Lender pays to a
bank or other similar institution arising out of or in connection with (i) the
forwarding to Borrower or any other Person on behalf of Borrower, by Lender, of
proceeds of loans made by Lender to Borrower pursuant to this Agreement and
(ii) the depositing for collection, by Lender, of any check or item of payment
received or delivered to Lender on account of the Obligations.

         2.10    Line Debit for Charges.  Lender may, at its option, make a
Revolving Credit Loan to reimburse itself for any and all amounts payable by
Borrower to Lender hereunder.  Alternatively, Lender may invoice Borrower for
any such amounts and, in such case and notwithstanding anything contained
herein to the contrary, interest shall not begin to accrue on such amounts
until five (5) days after the delivery by Lender of such invoice.

SECTION 3.       LOAN ADMINISTRATION

         3.1     Manner of Borrowing Revolving Credit Loans.  Borrowings under
the credit facility established pursuant to Section 1 hereof shall be as
follows:

                 3.1.1    Loan Requests.  A request for a Revolving Credit Loan
shall be made, or shall be deemed to be made, in the following manner:  (i)
Borrower shall give Lender notice of its intention to borrow, in which notice
Borrower shall specify the amount of the proposed borrowing and the proposed
borrowing date, no later than 11:00 a.m. Dallas, Texas time on the proposed
borrowing date; provided, however, Lender shall have the right to refuse to
accept such a request or make a Revolving Credit Loan if at such time there
exists a Default or an Event of Default; and (ii) the becoming due of any
amount required to be paid under this Agreement or under any of the other Loan
Documents, whether as principal, accrued interest, fees or other charges, shall
be deemed irrevocably to be a request by Borrower from Lender for a Revolving
Credit Loan on the due date of, and in an aggregate amount required to pay,
such principal, accrued interest, fees or other charges, and the proceeds of
any such Revolving Credit Loan may





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<PAGE>   11
be disbursed by Lender by way of direct payment of the relevant Obligation
(whether or not any Default, Event of Default or Out-of-Formula Condition
exists at the time of or would result from such Revolving Credit Loan) and
shall bear interest at the rate of interest applicable to Revolving Credit
Loans.  As an accommodation to Borrower, Lender may permit telephonic requests
for loans and electronic transmittal of instructions, authorizations,
agreements or reports to Lender by Borrower.  Unless Borrower specifically
directs Lender in writing not to accept or act upon telephonic or electronic
communications from Borrower, Lender shall have no liability to Borrower for
any loss or damage suffered by Borrower as a result of Lender's honoring of any
requests, execution of any instructions, authorizations or agreements or
reliance on any reports communicated to Lender telephonically or electronically
and purporting to have been sent to Lender by any individual from time to time
designated by Borrower as an authorized officer and Lender shall have no duty
to verify the origin or authenticity of any such communication.

                 3.1.2    Disbursement.  Borrower hereby irrevocably authorizes
Lender to disburse the proceeds of each Revolving Credit Loan requested, or
deemed to be requested, pursuant to  this Section 3.1.2 as follows:  (i) the
proceeds of each Revolving Credit Loan requested under Section 3.1.1(i) shall
be disbursed by Lender in lawful money of the United States of America in
immediately available funds, by wire transfer to such bank account as may be
agreed upon by Borrower and Lender from time to time or elsewhere if pursuant
to a written direction from Borrower; and (ii) the proceeds of each Revolving
Credit Loan requested under Section 3.1.1(ii) shall be disbursed by Lender by
way of direct payment of the relevant interest or other Obligation.

                 3.1.3    Authorization.  Borrower hereby irrevocably
authorizes Lender, in Lender's sole discretion, to advance to Borrower, and to
charge to Borrower's Loan Account hereunder as a Revolving Credit Loan, a sum
sufficient to pay all interest accrued on the Obligations during the
immediately preceding month and to pay all costs, fees and expenses at any time
owed by Borrower to Lender hereunder.

         3.2     Payments.  All payments with respect to any of the Obligations
shall be made to Lender on the date when due, in Dollars and in immediately
available funds, without any offset or counterclaim.  Except where evidenced by
notes or other instruments issued or made by Borrower to Lender specifically
containing payment provisions which are in conflict with this Section 3.2 (in
which event the conflicting provisions of said notes or other instruments shall
govern and control), the Obligations shall be payable as follows:

                 3.2.1    Principal.  Principal payable on account of Revolving
Credit Loans shall be payable by Borrower to Lender immediately upon the
earliest of (i) the receipt by Lender, Borrower or any other Loan Party of any
proceeds of any of the Collateral, to the extent of said proceeds, (ii) the
occurrence of an Event of Default in consequence of which Lender elects to
accelerate the maturity and payment of the Obligations, or (iii) termination of
this Agreement pursuant to Section 4 hereof; provided, however, that if an
Out-of-Formula Condition shall exist at any time, Borrower shall, on demand,
repay the Obligations to the extent necessary to eliminate the Out-of-Formula
Condition.





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<PAGE>   12
                 3.2.2    Interest.  Interest accrued on the Revolving Credit
Loans shall be due on the earliest of (i) the first calendar day of each month
(for the immediately preceding month), computed through the last calendar day
of the preceding month, (ii) the occurrence of an Event of Default in
consequence of which Lender elects to accelerate the maturity and payment of
the Obligations or (iii) termination of this Agreement pursuant to Section 4
hereof.

                 3.2.3    Costs, Fees and Charges.  Costs, fees and charges
payable pursuant to this Agreement shall be payable by Borrower as and when
provided in Section 2 hereof, to Lender or to any other Person designated by
Lender in writing.

                 3.2.4    Other Obligations.  The balance of the Obligations
requiring the payment of money, if any, shall be payable by Borrower to Lender
as and when provided in this Agreement, the Other Agreements or the Security
Documents, or, if no date of payment is otherwise specified in the Loan
Documents,  on demand.

         3.3     Application of Payments and Collections.  All items of payment
received by Lender by 12:00 noon, Dallas, Texas time, on any Business Day shall
be deemed received on that Business Day.  All items of payment received after
12:00 noon, Dallas, Texas time, on any Business Day shall be deemed received on
the following Business Day.  Borrower irrevocably waives the right to direct
the application of any and all payments and collections at any time or times
hereafter received by Lender from or on behalf of Borrower, and Borrower does
hereby irrevocably agree that Lender shall have the continuing exclusive right
to apply and reapply any and all such payments and collections received at any
time or times hereafter by Lender or its agent against the Obligations, in such
manner as Lender may deem advisable, notwithstanding any entry by Lender upon
any of its books and records.  If as the result of  collections of Accounts as
authorized by Section 6.2.6 hereof a credit balance exists in the Loan Account,
such credit balance shall not accrue interest in favor of Borrower, but shall
be available to Borrower at any time or times for so long as no Default or
Event of Default exists.  Lender may, at its option, offset such credit balance
against any of the Obligations upon and after the occurrence of an Event of
Default.

         3.4     Loan Account.  Lender shall establish an account on its books
(the "Loan Account") and shall enter all Loans as debits to the Loan Account
and shall also record in the Loan Account all payments made by Borrower on any
Obligations and all proceeds of Collateral which are finally paid to Lender,
and may record therein, in accordance with customary accounting practice, other
debits and credits, including interest and all charges and expenses properly
chargeable to Borrower.

         3.5     Statements of Account.  Lender will account to Borrower
monthly with a statement of Loans, charges and payments made pursuant to this
Agreement supported, if requested by Borrower, by appropriate documentation,
and such account rendered by Lender shall be deemed final, binding and
conclusive upon Borrower unless Lender is notified by Borrower in writing to
the contrary within sixty (60) days after the date each accounting is deemed to
have been sent pursuant to Section 11.8 hereof.  Such notice shall only be
deemed an objection to those items specifically objected to therein.





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<PAGE>   13
SECTION 4.       TERM AND TERMINATION

         4.1     Term of Agreement.  Subject to Section 4.2 hereof and Lender's
right to cease making Loans to Borrower upon or after the occurrence of any
Default or Event of Default, this Agreement shall terminate on April 30, 2000
(the "Original Term").

         4.2     Termination.

                 4.2.1    Termination by Lender.  After the occurrence and
during the continuation of an Event of Default, Lender may terminate this
Agreement without notice.

                 4.2.2    Termination by Borrower.  Upon at least sixty (60)
days prior written notice to Lender, Borrower may, at its option, terminate
this Agreement; provided, however, no such termination shall be effective until
Borrower has paid all of the Obligations in immediately available funds and all
Letters of Credit and LC Guaranties have expired or have been cash
collateralized to Lender's satisfaction.  Any notice of termination given by
Borrower shall be irrevocable unless Lender otherwise agrees in writing, and
Lender shall have no obligation to make any Loans or issue or procure any
Letters of Credit or LC Guaranties on or after the termination date stated in
such notice.  Borrower may elect to terminate this Agreement in its entirety
only.  No section of this Agreement or type of Loan available hereunder may be
terminated singly.

                 4.2.3    Termination Charges.  On the effective date of
termination of this Agreement for any reason, Borrower shall pay to Lender (in
addition to the then outstanding principal, accrued interest and other charges
owing under the terms of this Agreement and any of the other Loan Documents) as
liquidated damages for the loss of the bargain and not as a penalty, an amount
equal to two percent (2%) of the Total Credit Facility if termination occurs
during the second twelve-month period of the Original Term (May 1, 1998,
through April 30, 1999); and one percent (1%) of the Total Credit Facility if
termination occurs during the third twelve-month period of the Original Term
(May 1, 1999, through April 30, 2000).  If termination occurs on the last day
of the Original Term, no termination charge shall be payable.

                 4.2.4    Effect of Termination.  All of the Obligations shall
be immediately due and payable upon the termination date stated in any notice
of termination of this Agreement.  All undertakings, agreements, covenants,
warranties and representations of Borrower contained in the Loan Documents
shall survive any such termination and Lender shall retain its Liens in the
Collateral and all of its rights and remedies under the Loan Documents
notwithstanding such termination until Borrower has paid the Obligations to
Lender, in full, in immediately available funds, together with the applicable
termination charge, if any.  Notwithstanding the payment in full of the
Obligations, Lender shall not be required to terminate its security interests
in the Collateral unless, with respect to any loss or damage Lender may incur
as a result of  dishonored checks or other items of payment received by Lender
from Borrower, or any other Loan Party or any Account Debtor and applied to the
Obligations, Lender shall, at its option (i) have received a written agreement,
executed by Borrower, Drilling LP and by any Person whose loans or other





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<PAGE>   14
advances to Borrower are used in whole or in part to satisfy the Obligations,
indemnifying Lender from any such loss or damage; or (ii) have retained such
monetary reserves and Liens on the Collateral for such period of time as
Lender, in its reasonable discretion, may deem necessary to protect Lender from
any such loss or damage.

SECTION 5.       SECURITY INTERESTS

         5.1     Security Interest in Collateral.  To secure the prompt payment
and performance to Lender of all of the Obligations, Borrower hereby grants to
Lender a continuing security interest in and Lien upon all of Borrower's right,
title and interest in and to the following Property and interests in Property
of Borrower, whether now owned or existing or hereafter created, acquired or
arising and wheresoever located:

                 (i)      All accounts (as defined in Section 9.106 of the
Code);

                 (ii)     All Inventory;

                 (iii)    All General Intangibles (excluding, to the extent
included, drilling contracts other than the Drilling Contracts);

                 (iv)     All investment property (as defined in Section 9.115
of the Code);

                 (v)      the El Reno Property;

                 (vi)     the Drilling Rigs;

                 (vii)    the Drilling Contracts;

                 (viii)   All monies and other Property of any kind now or at
any time or times hereafter in the possession or under the control of Lender or
a bailee or Affiliate of Lender;

                 (ix)     All accessions to, substitutions for and all
replacements, products and cash and non-cash proceeds of (i) through (viii)
above, including, without limitation, proceeds of and unearned premiums with
respect to insurance policies insuring any of the Collateral; and

                 (x)      All books and records (including, without limitation,
customer lists, credit files, computer programs, print-outs, and other computer
materials and records) of Borrower pertaining to any of (i) through (ix) above.

         5.2     Intentionally Omitted.

         5.3     Lien Perfection; Further Assurances.  Borrower shall execute
such UCC-1 financing statements as are required by the Code and such other
instruments, assignments or documents as are necessary to perfect Lender's Lien
upon any of  the Collateral (other than motor vehicles and investment property)
and shall take such other action as may be required to





                                       9
<PAGE>   15
perfect or to continue the perfection of Lender's Lien upon such Collateral.
Unless prohibited by Applicable Law, Borrower hereby authorizes Lender to
execute and file any such financing statement on Borrower's behalf.  The
parties agree that a carbon, photographic or other reproduction of this
Agreement shall be sufficient as a financing statement and may be filed in any
appropriate office in lieu thereof.  At Lender's reasonable request, Borrower
shall also promptly execute or cause to be executed and shall deliver to Lender
any and all documents, instruments and agreements deemed necessary by Lender to
give effect to or carry out the terms or intent of the Loan Documents.

         5.4     Lien on Realty.  The due and punctual payment and performance
of the Obligations shall also be secured by a Lien upon the El Reno Property
owned by Drilling LP.

SECTION 6.       COLLATERAL ADMINISTRATION

         6.1     General

                 6.1.1    Location of Collateral.  All tangible items of
Collateral, other than Inventory in transit and Drilling Rigs, the locations of
which are reported to Lender pursuant to Section 6.4.4 hereof, motor vehicles
and investment property held in an account with a securities intermediary,
shall at all times be kept by Borrower and its Subsidiaries at one or more of
the business locations set forth in Exhibit A hereto and shall not, without the
prior written approval of Lender, be moved therefrom except, prior to an Event
of  Default and Lender's acceleration of the maturity of the Obligations in
consequence thereof, for (i) sales and other movement of Inventory in the
ordinary course of business, and (ii) removals in connection with dispositions
of Drilling Rigs that are authorized by Section 6.4.2 hereof.

                 6.1.2    Insurance of Collateral.  Borrower shall maintain and
pay, and cause each Subsidiary to maintain and pay, for insurance upon all
Collateral wherever located and with respect to Borrower's and its
Subsidiaries' business, covering casualty, hazard, public liability and such
other risks in such amounts and with such insurance companies as is carried by
prudent owners of similar assets engaged in similar operations (at the time of
issue of the policies in question) and approved by Lender.  Borrower or such
Subsidiary shall deliver the originals or certified copies of such policies to
Lender with satisfactory lender's loss payable endorsements, which policies
shall name Lender as a loss payee, assignee or additional insured, as
appropriate.  Each policy of insurance or endorsement shall contain a clause
requiring the insurer to give not less than thirty (30) days prior written
notice to Lender in the event of cancellation of the policy for any reason
whatsoever, unless such cancellation is a result of non-payment of premiums in
which case 10 days prior written notice shall be given to Lender, and a clause
specifying that the interest of Lender shall not be impaired or invalidated
regardless of any breach of or violation by Borrower or a Subsidiary of any
warranties, declarations or conditions contained in said policy.  If Borrower
or a Subsidiary fails to provide and pay for such insurance, Lender may, at its
option, but shall not be required to, procure the same and charge Borrower
therefor.  Borrower agrees, and shall cause each Subsidiary as applicable, to
deliver to Lender, promptly as rendered, true copies of all reports made in any
reporting forms to insurance companies.





                                       10
<PAGE>   16
                 6.1.3    Protection of Collateral.  All expenses of
protecting, storing, warehousing, insuring, handling, maintaining and shipping
the Collateral, any and all excise, property, sales, and use taxes imposed by
any Applicable Law on any of the Collateral or in respect of the sale thereof,
and all other payments required to be made by Lender to any Person to realize
upon any Collateral shall be borne and paid by Borrower.  If Borrower fails to
promptly pay any portion thereof when due, Lender may, at its option, but shall
not be required to, pay the same and charge Borrower therefor.  Lender shall
not be liable or responsible in any way for the safekeeping of any of the
Collateral or for any loss or damage thereto (except for reasonable care in the
custody thereof while any Collateral is in Lender's actual possession) or for
any diminution in the value thereof, or for any act or default of any
warehouseman, carrier, forwarding agency, or other Person whomsoever, but the
same shall be at Borrower's sole risk.

         6.2     Administration of Accounts.

                 6.2.1    Records, Schedules and Assignments of Accounts.
Drilling LP shall keep accurate and complete records of the Accounts and all
payments and collections thereon and shall submit to Lender on such periodic
basis as Lender shall request a sales and collections report for the preceding
period, in form satisfactory to Lender.  On or before the fifteenth day of each
month from and after the date hereof, Drilling LP shall deliver to Lender, in
form acceptable to Lender, a detailed  aged trial balance of all Accounts
existing as of the last day of the preceding month, specifying the names,
addresses, face value, dates of invoices and due dates for each Account Debtor
obligated on an Account so listed ("Schedule of Accounts"), and, upon Lender's
request therefor, copies of proof of delivery and the original copy of all
documents, including, without limitation, repayment histories and present
status reports relating to the Accounts so scheduled and such other matters and
information relating to the status of then existing Accounts as Lender shall
reasonably request.  In addition, if Accounts in an aggregate face amount in
excess of $350,000 become ineligible because they fall within one of the
specified categories of ineligibility set forth in the definition of Eligible
Accounts or otherwise established by Lender, Drilling LP shall notify Lender of
such occurrence on the first Business Day following the day such occurrence
becomes known to Drilling LP and the Borrowing Base shall thereupon be adjusted
to reflect such occurrence.  If requested by Lender, Drilling LP shall execute
and deliver to Lender agings and formal written assignments of all of the
Accounts weekly or daily, which shall include all Accounts that have been
created since the date of the last assignment, together with copies of invoices
or invoice registers related thereto.

                 6.2.2    Discounts, Allowances, Disputes.  If Drilling LP
grants any discounts, allowances or credits that are not shown on the face of
the invoice for the Account involved, Drilling LP shall report such discounts,
allowances or credits, as the case may be, to Lender as part of the next
required Schedule of Accounts.  If any amounts due and owing in excess of
$350,000 are in dispute between Drilling LP and any Account Debtor, Drilling LP
shall provide Lender with written notice thereof at the time of submission of
the next Schedule of Accounts, explaining in detail the reason for the dispute,
all claims related thereto and the amount in controversy.  Upon and after the
occurrence of an Event of Default, Lender shall have the right to settle or
adjust all disputes and claims directly with the Account Debtor and to
compromise the amount or extend the time for payment of the Accounts upon such
terms and conditions as





                                       11
<PAGE>   17
Lender may deem advisable, and to charge the deficiencies, costs and expenses
thereof, including attorney's fees, to Borrower.

                 6.2.3    Taxes.  If an Account includes a charge for any tax
payable to any governmental taxing authority, Lender is authorized, in its sole
discretion, to pay the amount thereof to the proper taxing authority for the
account of Drilling LP and to charge Borrower therefor; provided, however, that
Lender shall not be liable for any such taxes to any governmental taxing
authority that may be due by Drilling LP or Borrower.

                 6.2.4    Account Verification.  Whether or not a Default or an
Event of Default has occurred, any of Lender's officers, employees or agents
shall have the right, at any time or times hereafter, in the name of Lender,
any designee of Lender, Borrower or Drilling LP, to verify the validity, amount
or any other matter relating to any Accounts by mail, telephone, facsimile
transmission or otherwise.  Borrower and Drilling LP shall cooperate fully with
Lender in an effort to facilitate and promptly conclude any such verification
process.

                 6.2.5    Maintenance of Dominion Account. Drilling LP shall
maintain a Dominion Account pursuant to a lockbox arrangement acceptable to
Lender with such banks as may be selected by Drilling LP and be acceptable to
Lender.  Drilling LP shall issue to any such banks an irrevocable letter of
instruction directing such banks to deposit all payments or other remittances
received in the lockbox to the Dominion Account for application on account of
the Obligations.  All funds deposited in the Dominion Account shall immediately
become the property of Lender and Drilling LP shall obtain the agreement by
such banks in favor of Lender to waive any offset rights against the funds so
deposited.

                 6.2.6    Collection of Accounts, Proceeds of Collateral.  To
expedite collection, Drilling LP shall endeavor in the first instance to make
collection of the Accounts for Lender.  All remittances received by Borrower
and/or Drilling LP in respect of the Accounts, together with the proceeds of
any other Collateral, shall be held as Lender's property by Borrower or
Drilling LP, as the case may be, as trustee of an express trust for Lender's
benefit and Borrower or Drilling LP, as the case may be, shall immediately
deposit, or cause to be deposited, same in kind in the Dominion Account. Lender
retains the right at all times after the occurrence of an Event of Default to
notify Account Debtors (and account debtors of Borrower with respect to
Borrower's accounts) that Accounts, or accounts, the case may be, have been
assigned to Lender and to collect Accounts, or accounts, as the case may be,
directly in its own name and to charge the collection costs and expenses,
including reasonable attorneys' fees to Borrower.

         6.3     Intentionally Omitted.

         6.4     Administration of Drilling Rigs.

                 6.4.1    Records and Schedules of Drilling Rigs.  Borrower,
Drilling LP, and each other Subsidiary shall keep accurate records itemizing
and describing the kind, type, quality, quantity and value of the Drilling Rigs
and related equipment respectively owned by any of them, and all dispositions
made in accordance with Section 6.4.2 hereof, and shall furnish Lender





                                       12
<PAGE>   18
with a current schedule containing the foregoing information on at least an
annual basis and more often if requested by Lender.  Immediately on request
therefor by Lender, Borrower, Drilling LP, and each other Subsidiary shall
deliver to Lender any and all evidence of ownership, if any, of any of the
Drilling Rigs and related equipment respectively owned by any of them.

                 6.4.2    Dispositions of Drilling Rigs.  Borrower will not,
and shall cause Drilling LP and each other Subsidiary to not, sell, lease or
otherwise dispose of or transfer any of the Drilling Rigs or any part thereof
without the prior written consent of Lender; provided, however, that the
foregoing restriction shall not apply, for so long as no Default or Event of
Default exists, to (i) dispositions of Drilling Rigs and related equipment
which, in the aggregate during any fiscal year of Borrower, has a fair market
value or book value, whichever is less, of $1,000,000 or less, (ii)
replacements of Drilling Rigs and related equipment that are substantially
worn, damaged or obsolete with Drilling Rigs and related equipment of like
kind, function and value, provided that the replacement equipment or Drilling
Rigs shall be acquired prior to or concurrently with any disposition of the
Drilling Rigs and related equipment that is to be replaced, the replacement
Drilling Rigs and related equipment or Drilling Rigs shall be free and clear of
Liens other than Permitted Liens, or (iii) dispositions of Drilling Rigs
permitted under Section 8.2.9 hereof.

                 6.4.3    Condition of Drilling Rigs.  Borrower, Drilling LP,
each other Subsidiary represent and warrant to Lender that the Drilling Rigs
are in good operating condition and repair according to customary oil and gas
industry practice, and all necessary replacements of and repairs thereto shall
be made so that the value and operating efficiency of the Drilling Rigs shall
be maintained and preserved in accordance with such practice, reasonable wear
and tear excepted.  Borrower, Drilling LP, and each other Subsidiary will not
permit any of the and Drilling Rigs to become affixed to any real Property
leased to Borrower or any Subsidiary so that an interest arises therein under
the real estate laws of the applicable jurisdiction unless the landlord of such
real Property has executed a landlord waiver or leasehold mortgage in favor of
and in form acceptable to Lender, and Borrower, Drilling LP, and each other
Subsidiary will not permit any of the Drilling Rigs to become an accession to
any personal Property that is subject to a Lien unless the Lien is a Permitted
Lien.

                 6.4.4    Location of Drilling Rigs.  Not later than fifteen
(15) days after the end of each month hereafter, Borrower and Drilling LP shall
cause to be prepared and furnish to Lender a schedule indicating the precise
location of each Drilling Rig as of the end of such month.

         6.5     Payment of Charges.  All amounts chargeable to Borrower under
Section 6 hereof shall be Obligations secured by all of the Collateral, shall
be payable on demand and shall bear interest from the date such advance was
made until paid in full at the rate applicable to Revolving Credit Loans from
time to time.





                                       13
<PAGE>   19
SECTION 7.       REPRESENTATIONS AND WARRANTIES

         7.1     General Representations and Warranties.  To induce Lender to
enter into this Agreement and to make advances hereunder, Borrower and as the
case may be, Drilling LP, warrants and represents to Lender and covenants with
Lender that:

                 7.1.1.   Organization and Qualification.  Borrower and each of
its Subsidiaries is duly organized or formed, validly existing and in good
standing under the laws of the jurisdiction of its incorporation or formation.
Borrower and its Subsidiaries are duly qualified and authorized to do business
and in good standing in each state or jurisdiction listed on Exhibit B hereto
and in all other states and jurisdictions where the character of its Properties
or the nature of its activities make such qualification necessary, except where
the failure to be so qualified would not have a Material Adverse Effect.

                 7.1.2.   Corporate Power and Authority.  Each of Borrower and
its Subsidiaries is duly authorized and empowered to enter into, execute,
deliver and perform this Agreement and each of the other Loan Documents to
which it is a party.  The execution, delivery and performance of this Agreement
and each of the other Loan Documents have been duly authorized by all necessary
corporate, membership or partnership action, as the case may be, and do not and
will not (i) require any consent or approval of the shareholders of Borrower or
its corporate Subsidiaries, partners of Drilling LP or members of Drilling LLC;
(ii) contravene Borrower's or its corporate Subsidiaries charter, articles or
certificate of incorporation or by-laws, Drilling LP's certificate of limited
partnership or its partnership agreement; or Drilling LLC's operating
agreement; (iii) violate, or cause Borrower or its Subsidiaries to be in
default under, any provision of any law, rule, regulation, order, writ,
judgment, injunction, decree, determination or award in effect having
applicability to Borrower or its Subsidiaries, as the case may be; (iv) result
in a breach of or constitute a default under any indenture or loan or credit
agreement or any other agreement, lease or instrument to which Borrower or its
Subsidiaries is a party or by which any one of which or any of their respective
Properties may be bound or affected; or (v) result in, or require, the creation
or imposition of any Lien (other than Permitted Liens) upon or with respect to
any of the Properties now owned or hereafter acquired by Borrower its
Subsidiaries.

                 7.1.3.   Legally Enforceable Agreement.  This Agreement is,
and each of the other Loan Documents when delivered under this Agreement will
be, a legal, valid and binding obligation of Borrower and its Subsidiaries, as
the case may be, enforceable against it in accordance with its respective
terms, except to the extent that such enforcement may be limited by applicable
bankruptcy, insolvency or similar laws affecting creditors' rights generally or
by principles of equity pertaining to the availability of equitable remedies.

                 7.1.4.   Capital Structure on the Amendment Date.  Exhibit C
hereto states (i) the correct name of each of the Subsidiaries of Borrower, its
jurisdiction of incorporation, formation or organization, as the case may be,
and the percentage of its Voting Stock owned by Borrower, and, in the case of
Drilling LP, the respective partnership units and percentage interest,
including the general or limited nature thereof, held by each of Trend, Bonray
and Drilling LLC, (ii) the





                                       14
<PAGE>   20
name of each of Borrower's corporate or joint venture Affiliates and the nature
of the affiliation, (iii) the number, nature and holder (if such holder owns or
controls five percent (5%) or more of the outstanding securities) of all
outstanding Securities (including partnership interests) of Borrower and each
Subsidiary of Borrower, and (iv) the number of authorized, issued and treasury
shares of Borrower and each Subsidiary of Borrower.  Borrower has good title to
all of the shares it purports to own of the stock of each of its Subsidiaries,
free and clear in each case of any Lien.  All such shares have been duly issued
and are fully paid and non-assessable.  Trend, Bonray and Drilling LLC have
good title to all partnership interests they purport to own in Drilling LP,
free and clear in each case of any Lien.  Except as set forth on Exhibit C
there are no outstanding options to purchase, or any rights or warrants to
subscribe for, or any commitments or agreements to issue or sell, or any
Securities or obligations convertible into, or any powers of attorney relating
to, shares of the capital stock,. membership interest or partnership interest
of any Subsidiary.

                 7.1.5.   Corporate Names.  Neither Borrower nor any of its
Subsidiaries has been known as or used any corporate, fictitious or trade names
except those listed on Exhibit D hereto.  Except as set forth on Exhibit D
neither Borrower nor any of its Subsidiaries has been the surviving corporation
of a merger or consolidation or acquired all or substantially all of the assets
of any Person.

                 7.1.6.   Business Locations; Agent for Process.  Borrower's
and its Subsidiaries' chief executive office and other places of business are
as listed on Exhibit A hereto.  During the preceding five-year period, neither
Borrower nor any of its Subsidiaries has had an office or place of business
other than as listed on Exhibit A.  Except as shown on Exhibit A no Inventory
of Borrower is stored with a bailee, warehouseman or similar Person, nor is any
Inventory consigned to any Person.

                 7.1.7.   Title to Properties; Priority of Liens.  To the best
of Borrower's and Drilling LP's knowledge, Borrower and its Subsidiaries have
good and marketable title to and fee simple ownership of, or valid and
subsisting leasehold interests in, all of their real Property, and good title
to all of the Collateral and all of their other Property, in each case, free
and clear of all Liens except Permitted Liens.  Borrower, Drilling LP, and each
Subsidiary have paid or discharged all lawful claims (other than accounts
payable permitted to be outstanding under Section 8.2.3(iv)) which, if unpaid,
might become a Lien against any of such Borrower's, Drilling LP's, or such
other Subsidiary's Properties that is not a Permitted Lien.  The Liens granted
to Lender under Section 5 hereof are first priority Liens, subject only to
Permitted Liens.  All of the Drilling Rigs are mobile equipment which are not
designed to be permanently used for any one location and none of the Drilling
Rigs are certificated as motor vehicles under the laws of any jurisdiction.

                 7.1.8    Accounts.  Lender may rely, in determining which
Accounts of Drilling LP are Eligible Accounts, on all statements and
representations made by Borrower and/or Drilling LP with respect to any Account
or Accounts.  Unless otherwise indicated in writing to Lender, with respect to
each Account:





                                       15
<PAGE>   21
                          (i)     It is genuine and in all respects what it
purports to be, and it is not evidenced by a judgment;

                          (ii)    It arises out of a completed, bona fide sale
and delivery of goods or rendition of services by Drilling LP in the ordinary
course of its business and in accordance with the terms and conditions of all
purchase orders, contracts or other documents relating thereto and forming a
part of the contract between Drilling LP and the Account Debtor;

                          (iii)   It is for a liquidated amount maturing as
stated in the duplicate invoice covering such sale or rendition of services, a
copy of which has been furnished or is available to Lender;

                          (iv)    Such Account, and Lender's security interest
therein, is not subject to any offset, Lien, deduction, defense, dispute,
counterclaim or any other adverse condition, except for disputes resulting in
disputes in service where the amount in controversy is deemed by Lender to be
immaterial, and each such Account is absolutely owing to Drilling LP and is not
contingent in any respect or for any reason;

                          (v)     Drilling LP has made no agreement with any
Account Debtor thereunder for any extension, compromise, settlement or
modification of any such Account or any deduction therefrom, except discounts
or allowances which are granted by Drilling LP in the ordinary course of its
business for prompt payment and which are reflected in the calculation of the
net amount of each respective invoice related thereto and are reflected in the
Schedules of Accounts submitted to Lender pursuant to Section 6.2.1 hereof;

                          (vi)    There are no facts, events or occurrences
known to Borrower and/or Drilling LP which in any way impair the validity or
enforceability of any Accounts or tend to reduce the amount payable thereunder
from the face amount of the invoice and statements delivered to Lender with
respect thereto;

                          (vii)   To the best of Drilling LP's knowledge, the
Account Debtor thereunder (a) had the capacity to contract at the time any
contract or other document giving rise to the Account was executed and (b) such
Account Debtor is Solvent; and

                          (viii)  To the best of Drilling LP's knowledge, there
are no proceedings or actions which are threatened or pending against any
Account Debtor thereunder which might result in any material adverse change in
such Account Debtor's financial condition or the collectibility of such
Account.

                 7.1.9    Financial Statements; Fiscal Year.  The Consolidated
balance sheet of Borrower as of December 31, 1997, and the related statements
of income, changes in stockholder's equity, and cash flow statement for the
periods ended on such dates, have been prepared in accordance with GAAP, and
present fairly in all material respects the Consolidated financial position of
Borrower at such date and the results of Borrower's operations for such periods
in accordance with GAAP.  Since February 28, 1997, there has been no material
adverse





                                       16
<PAGE>   22
change in the condition, financial or otherwise, of Borrower or its
Subsidiaries and since such date there has been no material and adverse change
in the aggregate value of Drilling Rigs and real Property owned by Borrower,
except changes in the ordinary course of business, none of which individually
or in the aggregate has been materially adverse, and the corporate
restructuring of Borrower and its Subsidiaries occurring immediately prior to
the Amendment Date.  The fiscal year of each Borrower and each of its
respective Subsidiaries ends on December 31 of each year.

                 7.1.10   Full Disclosure.  The financial statements referred
to in Section 7.1.9 hereof do not, nor does this Agreement or any other written
statement of Borrower or any Loan Party to Lender, contain any untrue statement
of a material fact or omit a material fact, in either case known to Borrower,
necessary to make the statements contained therein or herein not misleading in
light of the circumstances under which such statement was made.  There is no
fact or circumstance known to Borrower which Borrower or its Subsidiaries has
failed to disclose to Lender in writing which could reasonably be expected to
have a Material Adverse Effect.

                 7.1.11.  Intentionally Omitted.

                 7.1.12.  Intentionally Omitted.

                 7.1.13.  Taxes.  Borrower's federal tax identification number
is 73-1508021.  Drilling LP's federal tax identification number is 73-1532348
Borrower and each of its Subsidiaries has filed all federal, state and local
tax returns and other reports it is required by law to file and has paid, or
made provision for the payment of, all Taxes upon it, its income and Properties
as and when such Taxes are due and payable, except to the extent being Properly
Contested.  The provision for Taxes on the books of Borrower and its
Subsidiaries are adequate for all years not closed by applicable statutes, and
for its current fiscal year.

                 7.1.14.  Intentionally Omitted.

                 7.1.15.  Patents, Trademarks, Copyrights and Licenses.
Borrower and each of its Subsidiaries own or possess all the material patents,
trademarks, service marks, trade names, copyrights and licenses necessary for
the present and planned future conduct of their business without any material
conflict with the rights of others and the failure to have such ownership or
possession would result in a Material Adverse Effect.  All patents, trademarks,
service marks, trade names, copyrights, licenses and other similar rights are
listed on Exhibit F hereto.

                 7.1.16.  Governmental Consents.  Borrower and each of its
Subsidiaries have, and are in good standing with respect to, the failure of
which, in any either case, would result in a Material Adverse Effect, all
material governmental consents, approvals, licenses, authorizations, permits,
certificates, inspections and franchises necessary to continue to conduct their
business as heretofore or proposed to be conducted by them and to own or lease
and operate their Properties as now owned or leased by them.





                                       17
<PAGE>   23
                 7.1.17.  Compliance with Laws.  Borrower and each of its
Subsidiaries have duly complied with, and their Properties, business operations
and leaseholds are in compliance in all material respects with, the provisions
of all material Applicable Law and there have been no citations, notices or
orders of material noncompliance issued to Borrower or any of its Subsidiaries
under any such law, rule or regulation the failure to comply with which would
result in a Material Adverse Effect. Borrower and each of its Subsidiaries has
established and maintains an adequate monitoring system to insure that it
remains in compliance with all federal, state and local laws, rules and
regulations applicable to it.

                 7.1.18.  Restrictions.  Neither Borrower nor any of its
Subsidiaries is a party or subject to any contract, agreement, or charter or
other corporate restriction, which has or could be reasonably expected to have
a Material Adverse Effect.  Except as set forth on Exhibit G, neither Borrower
nor any of its Subsidiaries is a party or otherwise subject to any contract or
agreement which restricts the right or ability of Borrower or such
Subsidiaries, as the case may be, to incur Indebtedness upon terms which are
more restrictive than the terms of this Agreement.  No contracts or agreements
to which Borrower or any of its Subsidiaries is a party or by which any of
their respective properties are bound prohibits the execution of or compliance
with this Agreement or the other Loan Documents by Borrower or any of its
Subsidiaries, as applicable.

                 7.1.19.  Litigation.  Except as set forth on Exhibit H hereto,
there are no actions, suits, proceedings or investigations pending, or to the
knowledge of Borrower, threatened, against or affecting Borrower or any of its
Subsidiaries, or the business, operations, Properties, prospects, profits or
condition of Borrower or any of its Subsidiaries in which the amount in
controversy exceeds $1,000,000.  Neither Borrower nor any of its Subsidiaries
is in default with respect to any order, writ, injunction, judgment, decree or
rule of any court, governmental authority or arbitration board or tribunal.

                 7.1.20.  No Defaults.  No event has occurred and no condition
exists which would, upon or after the execution and delivery of this Agreement
or any Borrower's or its Subsidiaries' performance hereunder, constitute a
Default or an Event of Default that may reasonably be expected to result in
costs to Borrower in excess of $1,000,000.  Neither Borrower nor any of its
Subsidiaries is in default, and no event has occurred and no condition exists
which constitutes, or which with the passage of time or the giving of notice or
both would constitute, a default in the payment of any Indebtedness to any
Person for Money Borrowed that may reasonably be expected to result in costs to
Borrower in excess of $1,000,000.

                 7.1.21.  Intentionally Omitted.

                 7.1.22.  Pension Plans.  Except as disclosed on Exhibit K
hereto, neither Borrower nor any of its Subsidiaries has any Plan.  Borrower
and each of its Subsidiaries is in full compliance with the requirements of
ERISA and the regulations promulgated thereunder with respect to each Plan.  No
fact or situation that could result in a material adverse change in the
financial condition of Borrower or any of its Subsidiaries exists in connection
with any Plan.  Neither Borrower nor any of its Subsidiaries has any withdrawal
liability in connection with a Multiemployer Plan.





                                       18
<PAGE>   24
                 7.1.23.  Trade Relations.  There exists no actual or
threatened termination, cancellation or limitation of, or any adverse
modification or change in, the business relationship between Borrower or any of
its Subsidiaries and any customer or any group of customers whose purchases
individually or in the aggregate are material to the business of Borrower or
any of its Subsidiaries, or with any material supplier, and there exists no
condition or state of facts or circumstances which would materially adversely
affect any Borrower and its Subsidiaries taken as a whole or prevent Borrower
and its Subsidiaries from conducting such business after the consummation of
the transaction contemplated by this Agreement in substantially the same manner
in which it has heretofore been conducted.

                 7.1.24.  Labor Relations.  Except as described on Exhibit L
hereto, neither Borrower nor any of its Subsidiaries is a party to any
collective bargaining agreement.  There are no material grievances, disputes or
controversies with any union or any other organization of Borrower's or any of
its Subsidiaries' employees, or threats of strikes, work stoppages or any
asserted pending demands for collective bargaining by any union or organization
which could result in a Material Adverse Effect.

         7.2.    Survival of Representations and Warranties.  All
representations and warranties of Borrower, Drilling LP, and the other
Subsidiaries contained in this Agreement or any of the other Loan Documents
shall survive the execution, delivery and acceptance thereof by Lender and the
parties thereto and the closing of the transactions described therein or
related thereto.

SECTION 8.       COVENANTS AND CONTINUING AGREEMENTS

         8.1     Affirmative Covenants.  During the term of this Agreement, and
thereafter for so long as there are any Obligations to Lender, Borrower
covenants that, unless otherwise consented to by Lender in writing, it shall:

                 8.1.1.   Visits and Inspections.  Permit representatives of
Lender, from time to time, as often as may be reasonably requested, but only
during normal business hours, to (i) visit and inspect its Properties and the
Properties of each of its Subsidiaries, and (ii) inspect, audit and make
extracts from its and its Subsidiaries books and records (including, without
limitation, all maintenance records for Drilling Rigs) and discuss with its
officers, employees and independent accountants, its business, assets,
liabilities, financial condition, business prospects and results of operations.

                 8.1.2.   Notices.  Notify Lender in writing (i) of the
occurrence of any event or the existence of any fact which renders any
representation or warranty in this Agreement or any of the other Loan Documents
inaccurate, incomplete or misleading in any material respect; (ii) promptly
after Borrower's learning thereof, of the commencement of any litigation
affecting Borrower, any Subsidiary or any of their respective Properties,
whether or not the claim is considered by Borrower to be covered by insurance,
and of the institution of any administrative proceeding which if determined
adversely to Borrower or any Subsidiary, would have a Material Adverse Effect;
(iii) at least thirty (30) days prior thereto, of Borrower's or any
Subsidiary's





                                       19
<PAGE>   25
opening of any new office or place of business or Borrower's or any
Subsidiary's closing of their respective principal place of business; (iv)
promptly after Borrower's learning thereof, of any material labor dispute to
which Borrower or any Subsidiary may become a party, any strikes or walkouts
relating to any of their respective plants or other facilities, and the
expiration of any material labor contract to which it or any Subsidiary is a
party or by which either is bound which, with respect to any of the foregoing,
could result in a Material Adverse Effect; (v) promptly after Borrower's
learning thereof, of any material default by any Loan Party under any note,
indenture, loan agreement, mortgage, lease, deed, guaranty or other similar
agreement relating to any Indebtedness of Borrower or any Subsidiary exceeding
$1,000,000; (vi) promptly after the occurrence thereof, of any Default or Event
of Default; (vii) promptly after the occurrence thereof, of any default by any
obligor under any note or other evidence of Indebtedness payable to Borrower or
any Subsidiary in an amount exceeding $1,000,000; and (viii) promptly after the
rendition thereof, of any judgment rendered against any Loan Party in an amount
exceeding $1,000,000.

                 8.1.3    Financial Statements.  Keep, and cause each
Subsidiary to keep, adequate records and books of account with respect to its
business activities in which proper entries are made in accordance with GAAP
reflecting all its financial transactions; and cause to be prepared and
furnished to Lender the following (all to be prepared in accordance with GAAP
applied on a consistent basis, unless Borrower's certified public accountants
concur in any change therein and such change is disclosed to Lender and is
consistent with GAAP):

                          (i)     not later than one hundred and twenty (120)
days after the close of each fiscal year of Borrower, unqualified audited
financial statements of Borrower and its Subsidiaries as of the end of such
year, on a Consolidated basis, certified by a firm of independent certified
public accountants of recognized standing selected by Borrower but acceptable
to Lender (except for a qualification for a change in accounting principles
with which the accountant concurs);

                          (ii)    not later than forty-five (45) days after the
end of any month during which a Form 10-Q must be filed by Borrower with the
Securities and Exchange Commission or any governmental authority which may be
substituted therefor, and thirty (30) days after the end of all other months,
unaudited interim financial statements of Borrower and its Subsidiaries as of
the end of such month and of the portion of Borrower's financial year then
elapsed, on a Consolidated and, upon the request of Lender, consolidating
basis, certified by the principal financial officer of Borrower as prepared in
accordance with GAAP and fairly presenting in all  material respects the
Consolidated financial position and results of operations of Borrower and its
Subsidiaries for such month and period subject only to changes from audit and
year-end adjustments and except that such statements need not contain notes;

                          (iii)   promptly after the sending or filing thereof,
as the case may be, copies of any proxy statements, financial statements or
reports which Borrower and/or its Subsidiaries has generally made available to
its shareholders and copies of any regular, periodic and special reports or
registration statements which Borrower and/or its Subsidiaries files with





                                       20
<PAGE>   26
the Securities and Exchange Commission or any governmental authority which may
be substituted therefor, or any national securities exchange;

                          (iv)    promptly after the filing thereof, copies of
any annual report to be filed in accordance with ERISA in connection with each
Plan;

                          (v)     such other data and information (financial
and otherwise) as Lender, from time to time, may reasonably request, bearing
upon or related to the Collateral or Borrower's and each of its Subsidiaries'
financial condition or results of operations; and

                 Concurrently with the delivery of the financial statements
described in clause (i) of this Section 8.1.3, Borrower shall forward to Lender
a copy of the accountants' letter to Borrower's management that is prepared in
connection with such financial statements and also shall cause to be prepared
and shall furnish to Lender a certificate of the aforesaid certified public
accountants certifying to Lender that, based upon their examination of the
financial statements of Borrower and its Subsidiaries performed in connection
with their examination of said financial statements, they are not aware of any
Default or Event of Default, or, if they are aware of such Default or Event of
Default, specifying the nature thereof.  Concurrently with the delivery of the
financial statements described in clauses (i) and (ii) of this Section 8.1.3,
or more frequently if requested by Lender, Borrower shall cause to be prepared
and furnished to Lender a Compliance Certificate in the form of Exhibit M
hereto executed by the chief financial officer of Borrower.

                 8.1.4    Landlord and Storage Agreements.  Upon the occurrence
and during the continuance of an Event of Default, provide Lender with copies
of all agreements between Borrower or any of its Subsidiaries and any landlord
or warehouseman which owns any premises at which any Inventory and Drilling
Rigs may, from time to time, be kept.

                 8.1.5    Projections.  No later than thirty (30) days prior to
the end of each fiscal year of Borrower, deliver to Lender projections of
Borrower's (consisting of Consolidated (and, if available, consolidating)
balance sheets, income statements and cash flow statements, together with
appropriate supporting details and underlying assumptions) for the forthcoming
fiscal year, month by month.

                 8.1.6    Taxes.  Pay and discharge, and cause each Subsidiary
to pay and discharge, all Taxes prior to the date on which such Taxes become
delinquent or penalties attach thereto, except and to the extent only that such
Taxes are being Properly Contested.

                 8.1.7    Compliance with Laws.  Comply and cause each
Subsidiary to comply, with all Applicable Laws, including all laws, statutes,
regulations and ordinances regarding the collection, payment and deposit of all
Taxes, and all ERISA and Environmental Laws, and obtain and keep in force any
and all licenses, permits, franchises, or other governmental authorizations
necessary to the ownership of its Properties or to the conduct of its business,
which violation or failure to obtain could reasonably be expected to have a
Material Adverse Effect.





                                       21
<PAGE>   27
                 8.1.8    Insurance.  In addition to the insurance required
herein with respect to the Collateral, Borrower shall maintain and cause each
Subsidiary to maintain, with financially sound and reputable insurers,
insurance with respect to its Properties and business against such casualties
and contingencies of such type (including product liability, business
interruption, larceny, embezzlement, or other criminal misappropriation
insurance) as is customary in its business and in such amounts as is acceptable
to Lender.

         8.2     Negative Covenants.  During the term of this Agreement, and
thereafter for so long as there are any Obligations to Lender, Borrower
covenants that, unless Lender has first consented thereto in writing, it will
not:

                 8.2.1    Mergers; Consolidations; Acquisitions.  In any
transaction or series of transactions, consolidate with or merge into any other
Person (other than a merger of a Subsidiary into the Borrower in which the
Borrower is the continuing corporation), or continue in a new jurisdiction or
sell, convey, assign, transfer, lease or otherwise dispose of all or
substantially all of the Property and assets of the Borrower and the
Subsidiaries, taken as a whole, or any Person, unless:

                          (i)     either (a) the Borrower shall be the
continuing corporation or (b) the corporation (if other than the Borrower)
formed by such consolidation or into which the Borrower is merged, or the
Person which acquires, by sale, assignment, conveyance, transfer, lease or
disposition, all or substantially all of the Property and assets of the
Borrower and the Subsidiaries, taken as a whole (such corporation or Person,
the "Surviving Entity"), shall be a corporation organized and validly existing
under the laws of the United States of America, any political subdivision
thereof or any state thereof or the District of Columbia, and shall expressly
assume, the due and punctual payment of the principal of (and premium, if any)
and interest on all the Obligations and the performance of the Borrower's
covenants and obligations under this Agreement and the other Loan Documents.

                          (ii)    immediately after giving effect to such
transaction or series of transactions on a pro forma basis (including, without
limitation, any Indebtedness incurred or anticipated to be incurred in
connection with or in respect of such transaction or series of transactions),
no Event of Default or Default shall have occurred and be continuing or would
result therefrom;

                          (iii)   immediately after giving effect to such
transaction or series of transactions on a pro forma basis (including, without
limitation, any Indebtedness incurred or anticipated to be incurred in
connection with or in respect of such transaction or series of transactions),
the Borrower (or the Surviving Entity if the Borrower is not continuing) shall
have a Tangible Net Worth equal to or greater than the Tangible Net Worth of
the Borrower immediately prior to such transactions;

                          (iv)    immediately after giving effect to any such
transaction or series of transactions on a pro forma basis as if such
transaction or series of transactions had occurred on the first day of the
Determination Period, the Borrower (or the Surviving Entity if the Borrower





                                       22
<PAGE>   28
is not continuing) would be permitted to incur $1.00 of additional Indebtedness
pursuant to the test described in Section 8.2.3;

                          (v)     the provision of clause (iv) shall not apply
to any merger or consolidation into or with, or any such transfer of all or
substantially all of the Property and assets of the Borrower and the
Subsidiaries taken as a whole into, the Borrower or a Wholly Owned Subsidiary.

                          (vi)    in connection with any consolidation, merger,
transfer of assets or other transactions contemplated by this provision, the
Borrower shall deliver, or cause to be delivered, to the Lender, in form and
substance reasonably satisfactory to the Lender, an Officers' Certificate and
an opinion of counsel, each stating that such consolidation, merger, sale,
assignment, conveyance or transfer and the assumption of obligations in
connection therewith in respect thereto comply with the provisions of this
Agreement and that all conditions precedent in this Agreement relating to such
transactions have been complied with.

                 8.2.2    Loans.  Except as provided in Sections 8.2.12 and
8.2.10 hereof and any intercompany loans between Drilling LP and Borrower, make
or permit any of its Subsidiaries to make, any loans or other advances of money
to any Person, except for travel advances, advances against commissions and
other similar advances in the ordinary course of business and Permitted
Investments (as defined in the Indenture).

                 8.2.3    Total Indebtedness.  (a) Create, incur, assume, or
suffer to exist, or permit any of its Subsidiaries to create, incur or suffer
to exist, any Indebtedness, (including Acquired Indebtedness), unless after
giving pro forma effect to the incurrence of such Indebtedness, the
Consolidated Interest Coverage Ratio for the Determination Period preceding the
Transaction Date is at least 2.5 to 1.0.  Notwithstanding the foregoing, the
Borrower or any Subsidiary (subject to the following paragraph) may incur
Permitted Indebtedness.  Any Indebtedness of a Person existing at time at which
such Person becomes a Subsidiary (whether by merger, consolidation, acquisition
or otherwise) shall be deemed to be incurred by such Subsidiary at the time at
which it becomes a Subsidiary.

                 (b)      Subject to Section 8.2.3(a), the Borrower will not
permit any Subsidiary to, directly or indirectly, incur any Indebtedness or
issue any Preferred Stock except:

                          (i)     Indebtedness or Preferred Stock issued to and
held by the Borrower, a Guarantor or a Wholly Owned Subsidiary, so long as any
transfer of such Indebtedness or Preferred Stock to a Person other than the
Borrower, Guarantor or a Wholly Owned Subsidiary will be deemed to constitute
an incurrence of such Indebtedness or Preferred Stock by the issuer thereof as
of the date of such transfer;

                          (ii)    Acquired Indebtedness or Preferred Stock of a
Subsidiary issued and outstanding prior to the date on which such Subsidiary
was acquired by the Borrower (other than Indebtedness or Preferred Stock issued
in connection with or in anticipation of such acquisition);





                                       23
<PAGE>   29
                          (iii)   Indebtedness or Preferred Stock outstanding
on the Issue Date and listed in a schedule attached to the Indenture;

                          (iv)    Indebtedness described in clauses (b), (c),
(d), (e), (f), (g), (h), (k) and (n) under the definition of "Permitted
Indebtedness" contained in the Indenture;

                          (v)     Permitted Subsidiary Refinancing Indebtedness
of such Subsidiary;

                          (vi)    Indebtedness or Preferred Stock issued in
exchange for, or the proceeds of which are used to refinance, repurchase or
redeem, Indebtedness or Preferred Stock described in clause (i) of this
paragraph (the "Retired Indebtedness or Stock"), provided that the Indebtedness
or the Preferred Stock so issued has (i) a principal amount or liquidation
value, as the case may be, not in excess of the principal amount or liquidation
value of the Retired Indebtedness or Stock plus related expenses for redemption
and issuance, (ii) a final redemption date later than the stated maturity or
final redemption date (if any) of the Retired Indebtedness or Stock and (iii)
an Average Life at the time of issuance of such Indebtedness or Preferred Stock
that is greater than the Average Life of the Retired Indebtedness or Stock;

                          (vii)   Indebtedness of a Subsidiary which represents
the assumption by such Subsidiary of Indebtedness of another Subsidiary in
connection with a merger of such Subsidiaries, provided that no Subsidiary or
any successor (by way of merger) thereto existing on the Amendment Date shall
assume or otherwise become responsible for any indebtedness of an entity which
is not a Subsidiary on the Amendment Date, except to the extent that a
Subsidiary would be permitted to incur such Indebtedness under this paragraph;

                          (viii)  Non-Recourse Indebtedness incurred by a
foreign Subsidiary not constituting a Guarantor; and

                          (ix)    Indebtedness incurred to finance all or a
part of the purchase price or construction, repair or improvement cost of
Property acquired, constructed, repaired or improved after the Amendment Date.

                 8.2.4    Affiliate Transactions.  Enter into or be a party to,
or permit any of its Subsidiaries to enter into or be a party to, any
transaction or series of related transactions with any Affiliate or stockholder
(excluding transactions between Borrower and Drilling LP), unless (i) such
transaction or series of related transactions is in the ordinary course of and
pursuant to the reasonable requirements of Borrower's or such Subsidiary's
business and upon fair and reasonable terms at the time entered into which are
fully disclosed to Lender and are no less favorable than would be obtained in a
comparable arm's length transaction with a Person not an Affiliate or
stockholder of Borrower or such Subsidiary and (ii) (a) with respect to a
transaction or series of related transactions that has a Fair Market Value in
excess of $5 million but less than $10 million, the Borrower delivers an
Officers' Certificate to the Lender certifying that such transaction or series
of related transactions complies with clause (i) above; or (b) with respect to
a transaction or series of related transactions that has a Fair Market Value
equal to or in excess of





                                       24
<PAGE>   30
$10 million, the transaction or series of related transactions is approved by a
majority of the Board of Directors of the Borrower (including a majority of the
disinterested directors), which approval is set forth in a Board Resolution
certifying that such transaction or series of transactions complies with clause
(i) above.  The foregoing provisions shall not be applicable to (i) reasonable
and customary compensation, indemnification and other benefits paid or made
available to an officer, director or employee of the Borrower or a Subsidiary
for services rendered in such person's capacity as an officer, director or
employee (including reimbursement or advancement of reasonable out-of-pocket
expenses and provisions of directors' and officers' liability insurance as well
as stock option agreements, restricted stock agreements and consulting or
similar agreements), (ii) the making of any Restricted Payment otherwise
permitted by the Indenture, (iii) any existing employment agreement, stock
option agreement, restricted stock agreement, consulting agreement or similar
agreement, (iv) any agreement in effect on the Issue Date or any amendment
thereto (so long a such amendment is, taken as a whole, no less favorable to
the Lender than the original agreement as in effect on the Issue Date) and any
transactions contemplated thereby, or (v) any transaction described in "Certain
Relationships and Related Transactions" in the Indenture.

                 8.2.5    Limitation on Liens.  Create or suffer to exist, or
permit any its Subsidiaries to create or suffer to exist, any Lien upon any of
the Collateral, whether now owned or hereafter acquired, except:

                          (i)     Liens at any time granted in favor of Lender;

                          (ii)    Liens for taxes (excluding any Lien imposed
pursuant to any of the provisions of ERISA) not yet due or being Properly
Contested;

                          (iii)   Liens arising in the ordinary course of its
business by operation of law or regulation, but only if (a) payment in respect
of any such Lien is not at the time required or (b) the Indebtedness secured by
such Lien is being Properly Contested and such Lien does not materially detract
from the value of the Property or materially impair the use thereof in the
operation of its business;

                          (iv)    security interests on top drives to the
extent that such security interests secure the financing by third parties of at
least 80% of the purchase price of top drives; provided, however, that the
aggregate purchase price of top drives shall not exceed $6,000,000; and
provided, further, that the financing for the purchase of top drives shall be
repaid from the proceeds of contracts for the use of the top drives of equal or
longer duration to the amortization schedules of such financings;

                          (v)     liens securing performance and bid bonds
obtained by Borrower in the ordinary course of their business up to an
aggregate amount of $1,000,000 at any time;

                          (vi)    liens securing the Indebtedness described in
Section 8.2.3(ix) above;





                                       25
<PAGE>   31
                          (vii)   such other Liens as appear on Exhibit O
hereto (including, without limitation, the liens securing the CIT Debt); and

                          (viii)  liens incurred or deposits made in the
ordinary course of business in connection with workers' compensation,
unemployment insurance and other types of social security, or to secure the
performance of tenders, statutory obligations, surety, stay, customs and appeal
bonds, bids, leases, government contracts, trade contracts, performance and
return-of-money bonds and other similar obligations (exclusive of obligations
for the payment of borrowed money).]

                 8.2.6    Subordinated Debt.  Make, or permit any of its
Subsidiaries to make, any payment of all or any part of any Subordinated Debt
or take any other action or omit to take any other action in respect of any
Subordinated Debt, except in accordance with the subordination agreement
relative thereto.

                 8.2.7    Restricted Payments.  Make, nor permit any Subsidiary
to make, any Restricted Payment, unless at the time of and after giving effect
to the proposed Restricted Payment, (a) no Default shall have occurred and be
continuing (or would immediately result therefrom), (b) the Borrower could
incur at least $1.00 of additional Indebtedness under the tests described in
Section 8.23 above, and (c) the aggregate amount of all Restricted Payments
declared or made on or after the Amendment Date by the Borrower or any
Subsidiary shall not exceed the sum of (i) 50% (or if such Consolidated Net
Income shall be a deficit, minus 100% of such deficit) of the aggregate
Consolidated Net Income accrued during the period beginning on the first day of
the fiscal quarter in which the Amendment Date falls and ending on the last day
of the fiscal quarter for which internal financial statements are available
ending immediately prior to the date of such proposed Restricted Payment, minus
100% of the amount of any writedowns, write-offs and other negative
extraordinary charges not otherwise reflected in Consolidated Net Income during
such period, plus (ii) an amount equal to the aggregate net cash proceeds
received by the Borrower, subsequent to the Amendment Date, from the issuance
or sale (other than to a Subsidiary) of shares of its Capital Stock (excluding
Redeemable Stock, but including Capital Stock issued upon the exercise of
options, warrants or rights to purchase Capital Stock (other than Redeemable
Stock) of the Borrower) and the liability (expressed as a positive number) as
expressed on the face of a balance sheet in accordance with GAAP in respect of
any Indebtedness of the Borrower or any of its Subsidiaries, or the carrying
value of Redeemable Stock, which has been converted into, exchanged for or
satisfied by the issuance of shares of Capital Stock (other than Redeemable
Stock) of the Borrower, subsequent to the Amendment Date, plus (iii) 100% of
the net reduction in Restricted Investments, subsequent to the Amendment Date,
in any Person, resulting from payments of interest on Indebtedness, dividends,
repayments of loans or advances, or other transfers of Property (but only to
the extent such interest, dividends, repayments or other transfers of Property
are not included in the calculation of Consolidated Net Income), in each case
to the Borrower, or any Subsidiary from any Person (including, without
limitation, from Unrestricted Subsidiaries) or from redesignations of
Unrestricted Subsidiaries as Subsidiaries (valued in each case as provided in
the definition of "Investments"), not to exceed in the case of any Person the
amount of Restricted Investments





                                       26
<PAGE>   32
previously made by the Borrower or any Subsidiary in such Person and in each
such case which was treated as a Restricted Payment, plus (iv) $10,000,000.

                          The foregoing provisions will not prevent (A) the
payment of any dividend on Capital Stock of any class within 60 days after the
date of its declaration if at the date of declaration such payment would be
permitted by the Indenture; (B) any repurchase or redemption of Capital Stock
or Subordinated Indebtedness of the Borrower or a Subsidiary made by exchange
for Capital Stock of the Borrower (other than Redeemable Stock), or out of the
net cash proceeds from the substantially concurrent issuance or sale (other
than to a Subsidiary) of Capital Stock of the Borrower (other than Redeemable
Stock), provided that the net cash proceeds from such sale are excluded from
computations under clause (c) (ii) above to the extent that such proceeds are
applied to purchase or redeem such Capital Stock or Subordinated Indebtedness;
(C) so long as no Default shall have occurred and be continuing or should occur
as a consequence thereof, any repurchase or redemption of Subordinated
Indebtedness of the Borrower or a Subsidiary solely in exchange for, or out of
the net cash proceeds from the substantially concurrent sale of, new
Subordinated Indebtedness of the Borrower or a Subsidiary, so long as such
Subordinated Indebtedness is permitted under the covenant described under
"Limitation on Indebtedness" in the Indenture and (x) is subordinated to the
Notes at least to the same extent as the Subordinated Indebtedness so
exchanged, purchased or redeemed, (y) has a stated maturity later than the
stated maturity of the Subordinated Indebtedness so exchanged, purchased or
redeemed and (z) has an Average Life at the time incurred that is greater than
the remaining Average Life of the Subordinated Indebtedness so exchanged,
purchased or redeemed; (D) Investments in any Joint Ventures and foreign
Subsidiaries not constituting Guarantors (as defined in the Indenture) in an
aggregate amount not to exceed $5 million; (E) the payment of any dividend or
distribution by a Subsidiary of the Borrower or any of its Wholly Owned
Subsidiaries; (F) so long as no Default or Event of Default shall have occurred
and be continuing or should occur as a consequence thereof, the repurchase,
redemption or other acquisition or retirement for value of any Capital Stock of
the Borrower held by any employee of the Borrower or any of its Subsidiaries,
provided that the aggregate price paid for all such repurchased, redeemed,
acquired or retired Capital Stock pursuant to the terms of an employee benefit
plan or employment or similar agreement shall not exceed $500,000 in any
calendar year, and (G) the acquisition of Capital Stock by the Borrower in
connection with the exercise of stock options or stock appreciation rights by
way of cashless exercise or in connection with the satisfaction of withholding
tax obligations.  Notwithstanding the foregoing, the amount available for
Investments in Joint Ventures and foreign Subsidiaries pursuant to clause (D)
of the preceding sentence may be increased by the aggregate amount received by
the Borrower and its Subsidiaries from a Joint Venture or a foreign Subsidiary
on or before such date resulting from payments of interest on Indebtedness,
dividends, repayments of loans or advances or other transfers of Property made
to such Joint Venture or foreign Subsidiary (but only to the extent such
interest, dividends, repayments or other transfers of Property are not included
in the calculation of Consolidated Net Income); Restricted Payments permitted
to be made as described in the first sentence of this paragraph will be
excluded in calculating the amount of Restricted Payments thereafter, except
that any such Restricted Payments permitted to be made pursuant to clauses (A),
(D), (E) (but only to the extent paid to someone other than the Borrower or any
of its





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<PAGE>   33
Wholly Owned Subsidiaries) and (F) will be included in calculating the amount
of Restricted Payments thereafter.

                          For purposes of this covenant, if a particular
Restricted Payment involves a non-cash payment, including a distribution of
assets, then such Restricted Payment shall be deemed to be an amount equal to
the cash portion of such Restricted Payment, if any, plus an amount equal to
the Fair Market Value of such non-cash portion of such Restricted Payment.

                 8.2.8    Intentionally Omitted.

                 8.2.9    Disposition of Assets.  Sell, lease or otherwise
dispose of, or permit any of its Subsidiaries to sell, lease or otherwise
dispose of the whole or, in the opinion of the Lender, any substantial part of
the Borrower's, or any Subsidiary's, business, property or other assets,
whether by a single transaction or by a series of transactions (related or not)
except (i) dispositions permitted under Section 6.4.2, or (ii) (a) (except for
Asset Sales resulting from the requisition of title to, seizure or forfeiture
of any Property or assets or any actual or constructive total loss or an agreed
or compromised total loss) the Borrower or such Subsidiary, as the case may be,
receives consideration at the time of such Asset Sale at least equal to the
Fair Market Value of the Property; (b) at least 75% of such consideration
consists of Cash Proceeds (or the assumption of Indebtedness of the Borrower or
such Subsidiary relating to the Capital Stock or Property or asset that was the
subject of such Asset Sale and the unconditional release of the Borrower or
such Subsidiary from such Indebtedness); and (c) the Borrower delivers to
Lender an Officers' Certificate certifying that such Asset Sale complies with
clauses (a) and (b) provided, however that any Asset Sale pursuant to a
condemnation, appropriation or other similar taking, including by deed in lieu
of condemnation, or pursuant to the foreclosure or other enforcement of a
Permitted Lien or exercise by the related lienholder of rights with respect
thereto, including by deed or assignment in lieu of foreclosure shall not be
required to satisfy the conditions set forth in clauses (a) and (b) of this
sentence.

                 8.2.10   Stock and/or Partnership Interests of Subsidiaries.
Permit any of its Subsidiaries to issue any additional shares of its capital
stock or partnership interests, as the case may be, to any Person other than
Borrower or any existing Subsidiary and as permitted by Sections 8.2.7 or
8.2.12.

                 8.2.11   Business Activity.  Without the prior written consent
of Lender (which consent shall not be unreasonably withheld) conduct or manage,
or permit any Subsidiary to conduct or manage, any business activity other than
a Related Business (as defined in the Indenture).

                 8.2.12   Restricted Payments.  Make or have, or permit any of
its Subsidiaries to make or have, any Restricted Payment (as defined in the
Indenture) other than those permitted hereunder.

                 8.2.13   Intentionally Omitted.





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<PAGE>   34
                 8.2.14   Tax Consolidation.  File or consent to the filing of
any consolidated income tax return with any Person other than its Subsidiaries.

         8.3     Specific Financial Covenants.  During the term of this
Agreement, and thereafter for so long as there are any Obligations to Lender,
Borrower covenants that, unless otherwise consented to by Lender in writing, it
shall:

                 (i)      maintain, on a quarterly basis, a Cash Flow Coverage
Ratio of at least  1.50:1.0 in 1998 and 1.75:1.0 thereafter;

                 (ii)     maintain at all times a Consolidated Interest
Coverage Ratio (as defined on Exhibit "R") of at least 1.5 to 1.0.

                 (iii)    maintain, on a consolidated basis, a ratio of Total
Liabilities to Tangible Net Worth not greater than 1.0:1.0 in 1998 and
thereafter (excluding for purposes of this test the Total Liabilities and
Tangible Net Worth of any Unrestricted Subsidiary).

SECTION 9.       CONDITIONS PRECEDENT

         Notwithstanding any other provision of this Agreement or any of the
other Loan Documents, and without affecting in any manner the rights of Lender
under the other Sections of this Agreement, Lender shall not be required to
make any Loan under this Agreement unless and until each of the following
conditions has been and continues to be satisfied:

         9.1     Documentation.  Lender shall have received, in form and
substance satisfactory to Lender and its counsel, a duly executed copy of this
Agreement and the other Loan Documents, together with such additional
documents, instruments and certificates as Lender and its counsel shall require
in connection therewith from time to time, all in form and substance
satisfactory to Lender and its counsel.

         9.2     No Default.  No Default or Event of Default shall exist.

         9.3     Other Loan Documents.  Each of the conditions precedent set
forth in the other Loan Documents shall have been satisfied.

         9.4     Certificate of Limited Partnership.  Lender shall have
received a copy of the Certificate of Limited Partnership of Drilling LP and
all amendments thereto, certified by the Secretary of State or other applicable
official of the jurisdiction of Drilling LP's incorporation.

         9.5     Partnership Agreement.  Lender shall have received a copy of
the partnership agreement which is in full force and effect as of the date
hereof of Drilling LP and all amendments thereto.

         9.6     Articles of Incorporation; Operating Agreement.  Lender shall
have received a copy of the Articles or Certificate of Incorporation or
Operating Agreement of Borrower and





                                       29
<PAGE>   35
each of its Subsidiaries, and all amendments thereto, certified by the
Secretary of State or other appropriate official of the jurisdiction of
Borrower's and each Subsidiary's incorporation.

         9.7     Good Standing Certificates.  Lender shall have received good
standing certificates for Borrower and each of its Subsidiaries (including,
without limitation, Drilling LP), issued by the Secretary of State or other
appropriate official of Borrower's and each Subsidiary's jurisdiction of
incorporation and each jurisdiction where the conduct of Borrower's or any of
its Subsidiary's business activities or ownership of its Property necessitates
qualification.

         9.8     Opinion Letters.  Lender shall have received a favorable,
written opinion of counsel to Borrower, as to the transactions contemplated by
this Agreement, to be in form and substance satisfactory to Lender and Lender's
counsel, in their sole discretion.

         9.9     Insurance.  Lender shall have received copies of the casualty
insurance policies of Borrower and each of its Subsidiaries, together with loss
payable endorsements on Lender's standard form of loss payee endorsement naming
Lender as loss payee and copies of Borrowers' and each such Subsidiary's
liability insurance policies, together with endorsements naming Lender as a
co-insured.

         9.10    Dominion Account.  Lender shall have received the duly
executed agreement establishing the Dominion Account with a financial
institution acceptable to Lender for the collection or servicing of the
Accounts.

         9.11    Representations.  Each representation, warranty or other
statement made or furnished to Lender by or on behalf of Borrower, any
Subsidiary of Borrower or any other Loan Party in this Agreement, any of the
other Loan Documents or any instrument, certificate or financial statement
furnished in compliance with or in reference thereto shall be true and correct
in all material respects.

         9.12    No Litigation.  No action, proceeding, investigation,
regulation or legislation shall have been instituted, threatened or proposed
before any court, governmental agency or legislative body to enjoin, restrain
or prohibit, or to obtain damages in respect of, or which is related to or
arises out of this Agreement or the consummation of the transactions
contemplated hereby.

         9.13    Evidence of Perfection and Priority of Liens in Collateral.
Lender shall have received copies of all filing receipts or acknowledgments
issued by any governmental authority to evidence any filing or recordation
necessary to perfect the Liens of Lender in the Collateral and evidence in form
satisfactory to Lender that such Liens constitute valid and perfected security
interests and Liens, and that there are no other Liens upon any Collateral
except for Permitted Liens.

         9.14    CIT Intercreditor Agreement.  CIT and Lender shall have
executed an intercreditor agreement in form and substance satisfactory to
Lender.





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<PAGE>   36
         9.15    No Material Adverse Change.  There shall have been no material
adverse change in any of Borrower's financial condition between December 31,
1997, and the Amendment Date other than as an immediate result of the corporate
restructuring of Borrower and its Subsidiaries occurring immediately prior to
the Amendment Date.

SECTION 10.      EVENTS OF DEFAULT; RIGHTS AND REMEDIES ON DEFAULT

         10.1    Events of Default.  The occurrence of one or more of the
following events shall constitute an "Event of Default":

                 10.1.1   Payment of Obligations.  Borrower shall fail to pay
any of the Obligations on the due date thereof (whether due at stated maturity,
on demand, upon acceleration or otherwise).

                 10.1.2   Misrepresentations.  Any representation, warranty or
other statement made or furnished to Lender by or on behalf of Borrower, any
Subsidiary of Borrower or any other Loan Party in this Agreement, any of the
other Loan Documents or any instrument, certificate or financial statement
furnished in compliance with or in reference thereto proves to have been false
or misleading in any material respect when made or furnished or when reaffirmed
pursuant to Section 9.11 hereof.

                 10.1.3   Breach of Specific Covenants.  Borrower shall fail or
neglect to perform, keep or observe any covenant contained in Sections 5.2,
5.3, 6.1.2, 6.2, 8.1.1, 8.1.3, 8.2 or 8.3 hereof on the date that Borrower is
required to perform, keep or observe such covenant.

                 10.1.4   Breach of Other Covenants.  Borrower shall fail or
neglect to perform, keep or observe any covenant contained in this Agreement
(other than a covenant which is dealt with specifically elsewhere in Section
10.1 hereof) and the breach of such other covenant is not cured to Lender's
satisfaction within twenty (20) days after the sooner to occur of Borrower's
receipt of notice of such breach from Lender or the date on which such failure
or neglect first becomes known to any officer of Borrower.

                 10.1.5   Default Under Security Documents/Other Agreements.
Any event of default shall occur under, or any Loan Party shall default in the
performance or observance of any term, covenant, condition or agreement
contained in, any of the Security Documents or the Other Agreements and such
default shall continue beyond any applicable grace period.

                 10.1.6   Other Defaults.  There shall occur any default or
event of default on the part of Borrower or any of the Guarantors under any
agreement, document or instrument to which Borrower or any such Guarantor is a
party or by which Borrower or any of the Guarantors or any of their respective
Property is bound, creating or relating to any Indebtedness (other than the
Obligations) in excess of $7,500,000, if the payment or maturity of such
Indebtedness is or may be accelerated in consequence of such event of default
or demand for payment of such Indebtedness is made.





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<PAGE>   37
                 10.1.7   Uninsured Losses.  Any material loss, theft, damage
or destruction of any of the tangible Collateral not fully covered (subject to
such deductibles as Lender shall have permitted) by insurance.

                 10.1.8   Adverse Changes.  There shall occur any material
adverse change in the financial condition or business prospects of Borrower and
the Subsidiaries taken as a whole.

                 10.1.9   Insolvency and Related Proceedings.  Any Loan Party
shall cease to be Solvent or shall suffer the appointment of a receiver,
trustee, custodian or similar fiduciary, or shall make an assignment for the
benefit of creditors, or any petition for an order for relief shall be filed by
or against a Loan Party under the Bankruptcy Code (and if, with respect to any
petition filed against any Loan Party, such proceeding shall continue for more
than thirty (30) days), or any Loan Party shall make any offer of settlement,
extension or compromise to such Loan Party's unsecured creditors generally.

                 10.1.10  Business Disruption; Condemnation.  There shall occur
a cessation of a substantial part of the business of Borrower, any Subsidiary
of Borrower for a period which significantly affects Borrower's or such
Subsidiary's capacity to continue its business, on a profitable basis; or
Borrower or any Subsidiary of Borrower shall suffer the loss or revocation of
any license or permit now held or hereafter acquired by such Borrower or such
Subsidiary which is necessary to the continued or lawful operation of its
business; or Borrower or any Subsidiary of Borrower shall be enjoined,
restrained or in any way prevented by court, governmental or administrative
order from conducting all or any material part of its business affairs; or any
material lease or agreement pursuant to which Borrower or any Subsidiary of
Borrower leases, uses or occupies any Property shall be canceled or terminated
prior to the expiration of its stated term; or any part of the Collateral shall
be taken through condemnation or the value of such Property shall be impaired
through condemnation.

                 10.1.11  Change of Control.  (i) a "Change of Control," as
that term is defined in the Indenture, occurs, (ii) subject to Section 8.2.1,
Borrower shall cease to own and control beneficially and of record one hundred
percent (100%) of each class of the issued and outstanding capital stock, or
membership units, as the case may be, in each of Trend, Drilling LLC, and
Bonray, or (iii) subject to Section 8.2.1, Trend, Drilling LLC, and Bonray
shall cease to collectively own and control, beneficially and of record, one
hundred percent (100%) of the outstanding partnership interests of Drilling LP.

                 10.1.12  ERISA.  A Reportable Event shall occur which Lender,
in its sole discretion, shall determine in good faith constitutes grounds for
the termination by the Pension Benefit Guaranty Corporation of any Plan or for
the appointment by the appropriate United States district court of a trustee
for any Plan, or if any Plan shall be terminated or any such trustee shall be
requested or appointed, or if Borrower or any Subsidiary of Borrower is in
"default" (as defined in Section 4219(c)(5) of ERISA) with respect to payments
to a Multiemployer Plan resulting from Borrower's or such Subsidiary's complete
or partial withdrawal from such Plan and, with respect to any of the foregoing,
could result in a Material Adverse Effect.





                                       32
<PAGE>   38
                 10.1.13  Challenge to Agreement.  Borrower, any Subsidiary of
Borrower or any other Loan Party, or any Affiliate of any of them, shall
challenge or contest in any action, suit or proceeding the validity or
enforceability of this Agreement, or any of the other Loan Documents, the
legality or enforceability of any of the Obligations or the perfection or
priority of any Lien granted to Lender.

                 10.1.14  Criminal Forfeiture.  Borrower or any Subsidiary of
Borrower shall be criminally indicted or convicted under any law that could
lead to a forfeiture of any Property of Borrower or any Subsidiary of Borrower.

                 10.1.15  Judgments.  Any (i) money judgment for the payment of
money in excess of $7,500,000 is filed against Borrower or any Subsidiary of
Borrower or any of its respective Property, and such judgment shall remain
unpaid, unsatisfied by insurance, and unstayed for more than thirty (30) days,
whether or not consecutive, or (ii) writ of attachment or similar process is
filed against Borrower or any Subsidiary of Borrower, or any of its respective
Property, and such writ of attachment or similar process is not bonded or
secured in an amount and manner reasonably satisfactory to lender.

                 10.1.16  Dominion Account.  Drilling LP shall fail to maintain
a Dominion Account or shall notify Lender that it intends to terminate its
existing Dominion Account.

                 10.1.17  Indenture and CIT Loan Agreement.  An Event of
Default occurs under the Indenture or the CIT Loan Agreement.

         10.2    Acceleration of the Obligations.  Without in any way limiting
the right of Lender to demand payment of any portion of the Obligations payable
on demand in accordance with Section 3.2 hereof, upon or at any time after the
occurrence of an Event of Default, all or any portion of the Obligations
shall, at the option of Lender and without presentment, demand, protest, notice
of intent to accelerate, notice of acceleration, or any other further notice by
Lender, become at once due and payable and Borrower shall forthwith pay to
Lender, the full amount of such Obligations; provided, however, that upon the
occurrence of an Event of Default specified in Section 10.1.9 hereof, all of
the Obligations shall become automatically due and payable without declaration,
notice or demand by Lender.

         10.3    Other Remedies.  Upon the occurrence and during the
continuance of an Event of Default, Lender shall have and may exercise from
time to time the following rights and remedies:

                 10.3.1   All of the rights and remedies of a secured party
under the Code or under other Applicable Law, and all other legal and equitable
rights to which Lender may be entitled, all of which rights and remedies shall
be cumulative and shall be in addition to any other rights or remedies
contained in this Agreement or any of the other Loan Documents, and none of
which shall be exclusive.





                                       33
<PAGE>   39
                 10.3.2   The right to take immediate possession of the
Collateral, and to (i) require Borrower to assemble the Collateral, at
Borrower's expense, and make it available to Lender at a place designated by
Lender which is reasonably convenient to both parties, and (ii) enter any
premises where any of the Collateral shall be located and to keep and store the
Collateral on said premises until sold (and if said premises be the Property of
Borrower, Borrower agrees not to charge Lender for storage thereof).

                 10.3.3   The right to sell or otherwise dispose of all or any
Collateral in its then condition, or after any further manufacturing or
processing thereof, at public or private sale or sales, with such notice as may
be required by law, in lots or in bulk, for cash or on credit, all as Lender,
in its sole discretion, may deem advisable.  Borrower agrees that any
requirement of notice to Borrower of any proposed public or private sale or
other disposition of Collateral by Lender shall be deemed reasonable notice
thereof if given at least ten (10) days prior thereto, and any such sale may be
held at such locations as Lender may designate in said notice.  Lender shall
have the right to conduct such sales on Borrower's premises, without charge
therefor, and such sales may be adjourned from time to time in accordance with
Applicable Law.  Lender shall have the right to sell, lease or otherwise
dispose of the Collateral, or any part thereof, for cash, credit or any
combination thereof, and Lender may purchase all or any part of the Collateral
at public or, if permitted by law, private sale and, in lieu of actual payment
of such purchase price, may set off the amount of such price against the
Obligations.  The proceeds realized from the sale of any Collateral may be
applied, after allowing two (2) Business Days for collection, first to the
costs, expenses and attorneys' fees incurred by Lender in collecting the
Obligations, in enforcing the rights of Lender under the Loan Documents and in
collecting, retaking, completing, protecting, removing, storing, advertising
for sale, selling and delivering any Collateral; second to the interest due
upon any of the Obligations; and third, to the principal of the Obligations.
If any deficiency shall arise, Borrower shall remain liable to Lender therefor.

                 10.3.4   The right to exercise all of Lender's rights and
remedies under any mortgage/deed of trust with respect to any real Property
forming a part of the Collateral.

                 10.3.5   Lender is hereby granted a license or other right to
use, without charge, Borrower's labels, patents, copyrights, rights of use of
any name, trade secrets, trade names, trademarks and advertising matter, or any
Property of a similar nature, as it pertains to the Collateral, in advertising
for sale and selling any Collateral and Borrower's rights under all licenses
and all franchise agreements shall inure to Lender's benefit.

                 10.3.6   Lender may, at its option, require Borrower to
deposit with Lender funds equal to the LC Amount and, if Borrower fails to
promptly make such deposit, Lender may advance such amount as a Revolving
Credit Loan (whether or not an Out of Formula Condition is created thereby).
Any such deposit or advance shall be held by Lender as a reserve to fund future
payments on such LC Guaranties and future drawings against such Letters of
Credit.  At such time as all LC Guaranties have been paid or terminated and all
Letters of Credit have been drawn upon or expired, any amounts remaining in
such reserve shall be applied against any outstanding Obligations, or, if all
Obligations have been indefeasibly paid in full, returned to Borrower.





                                       34
<PAGE>   40
         10.4    Remedies Cumulative; No Waiver.  All covenants, conditions,
provisions, warranties, guaranties, indemnities, and other undertakings of
Borrower contained in this Agreement and the other Loan Documents, or in any
document referred to herein or contained in any agreement supplementary hereto
or in any schedule or in any Guaranty Agreement given to Lender or contained in
any other agreement between Lender and Borrower, heretofore, concurrently, or
hereafter entered into, shall be deemed cumulative to and not in derogation or
substitution of any of the terms, covenants, conditions, or agreements of
Borrower herein contained.  The failure or delay of Lender to require strict
performance by Borrower of any provision of this Agreement or to exercise or
enforce any rights, Liens, powers, or remedies hereunder or under any of the
aforesaid agreements or other documents or security or Collateral shall not
operate as a waiver of such performance, Liens, rights, powers and  remedies,
but all such requirements, Liens, rights, powers, and remedies shall continue
in full force and effect until all Loans and all other Obligations owing or to
become owing from Borrower to Lender shall have been fully satisfied.  None of
the undertakings, agreements, warranties, covenants and representations of
Borrower contained in this Agreement or any of the other Loan Documents and no
Event of Default by Borrower under this Agreement or any other Loan Documents
shall be deemed to have been suspended or waived by Lender, unless such
suspension or waiver is by an instrument in writing specifying such suspension
or waiver and is signed by a duly authorized representative of Lender and
directed to Borrower.

SECTION 11.      MISCELLANEOUS

         11.1    Power of Attorney.  Borrower hereby irrevocably designates,
makes, constitutes and appoints Lender (and all Persons designated by Lender)
as Borrower's true and lawful attorney (and agent-in-fact) and Lender, or
Lender's agent, may, without notice to Borrower and in either Borrower's or
Lender's name, but at the cost and expense of Borrower:

                 11.1.1   At such time or times as Lender or said agent, in its
sole discretion, may determine, endorse Borrower's name on any checks, notes,
acceptances, drafts, money orders or any other evidence of payment or proceeds
of the Collateral which come into the possession of Lender or under Lender's
control.

                 11.1.2   At such time or times upon the occurrence and during
the continuance of an Event of Default as Lender or its agent in its sole
discretion may determine: (i) demand payment of the Accounts from the Account
Debtors, enforce payment of the Accounts by legal proceedings or otherwise, and
generally exercise all of Drilling LP's rights and remedies with respect to the
collection of the Accounts; (ii) settle, adjust, compromise, discharge or
release any of the Accounts or other Collateral or any legal proceedings
brought to collect any of the Accounts or other Collateral; (iii) sell or
assign any of the Accounts and other Collateral upon such terms, for such
amounts and at such time or times as Lender deems advisable; (iv) take control,
in any manner, of any item of payment or proceeds relating to any Collateral;
(v) prepare, file and sign Borrower's name to a proof of claim in bankruptcy or
similar document against any Account Debtor or to any notice of lien,
assignment or satisfaction of lien or similar document in connection with any
of the Collateral; (vi) receive, open and dispose of all mail





                                       35
<PAGE>   41
addressed to Borrower and to notify postal authorities to change the address
for delivery thereof to such  address as Lender may designate; (vii) endorse
the name of Borrower upon any of the items of payment or proceeds relating to
any Collateral and deposit the same to the account of Lender on account of the
Obligations; (viii) endorse the name of Borrower upon any chattel paper,
document, instrument, invoice, freight bill, bill of lading or similar document
or agreement relating to the Accounts, Inventory and any other Collateral; (ix)
use Borrower's stationery and sign the name of Borrower to verifications of the
Accounts and notices thereof to Account Debtors; (x) use the information
recorded on or contained in any data processing equipment and computer hardware
and software relating to the Accounts, Inventory and any other Collateral; (xi)
make and adjust claims under policies of insurance; and (xii) do all other acts
and things necessary, in Lender's determination, to fulfill Borrower's
obligations under this Agreement.

         11.2    Indemnity.  BORROWER HEREBY INDEMNIFIES, HOLDS HARMLESS, AND
SHALL DEFEND LENDER AND ITS DIRECTORS, OFFICERS, AGENTS, COUNSEL AND EMPLOYEES
("INDEMNIFIED PERSONS") FROM AND AGAINST ANY AND ALL LOSSES, LIABILITIES,
DAMAGES, COSTS, EXPENSES, SUITS, ACTIONS AND PROCEEDINGS ("LOSSES") EVER
SUFFERED OR INCURRED BY ANY INDEMNIFIED PERSON ARISING OUT OF OR RELATING TO
THIS AGREEMENT OR ANY OTHER TRANSACTION CONTEMPLATED HEREBY, INCLUDING, WITHOUT
LIMITATION, ANY LOSSES CAUSED BY THE NEGLIGENCE OF ANY SUCH INDEMNIFIED PERSON,
BUT NOT INCLUDING ANY LOSSES CAUSED BY THE GROSS NEGLIGENCE OR WILLFUL
MISCONDUCT OF ANY SUCH INDEMNIFIED PERSON, AND BORROWER SHALL REIMBURSE LENDER
AND EACH OTHER INDEMNIFIED PERSON FOR ANY EXPENSES (INCLUDING IN CONNECTION
WITH THE INVESTIGATION OF, PREPARATION FOR OR DEFENSE OF ANY ACTUAL OR
THREATENED CLAIM, ACTION OR PROCEEDING ARISING THEREFROM, INCLUDING ANY SUCH
COSTS OF RESPONDING TO DISCOVERY REQUESTS OR SUBPOENAS, REGARDLESS OF WHETHER
LENDER OR SUCH OTHER INDEMNIFIED PERSON IS A PARTY THERETO).  WITHOUT LIMITING
THE GENERALITY OF THE FOREGOING, THIS INDEMNITY SHALL EXTEND TO ANY CLAIMS
ASSERTED AGAINST LENDER OR ANY OTHER INDEMNIFIED PERSON BY ANY PERSON UNDER ANY
ENVIRONMENTAL LAWS OR SIMILAR LAWS BY REASON OF BORROWER'S OR ANY OTHER
PERSON'S FAILURE TO COMPLY WITH LAWS APPLICABLE TO SOLID OR HAZARDOUS WASTE
MATERIALS OR OTHER TOXIC SUBSTANCES.  BORROWER MAY SELECT COUNSEL WITH RESPECT
TO ANY LOSSES; PROVIDED, HOWEVER, EACH INDEMNIFIED PERSON SHALL HAVE THE RIGHT
TO MONITOR THE PROGRESS OF ANY CLAIMS, SUITS AND ADMINISTRATIVE PROCEEDINGS
DEFENDED BY BORROWER HEREUNDER WITH COUNSEL OF SUCH INDEMNIFIED PERSON'S
CHOICE, OR CONDUCT ITS DEFENSE THROUGH COUNSEL OF SUCH INDEMNIFIED PERSON'S
CHOICE, IN THE EVENT THAT (I) SUCH INDEMNIFIED PERSON DETERMINES IN GOOD FAITH
THAT THE CONDUCT OF ITS DEFENSE BY BORROWER COULD BE MATERIALLY PREJUDICIAL TO
SUCH INDEMNIFIED PERSON'S INTERESTS OR THAT OTHER REASONABLE GROUNDS EXIST
WHICH DEMONSTRATE A LACK OF EFFECTIVENESS OR HIGH LEVEL OF QUALITY IN THE





                                       36
<PAGE>   42
CONDUCT OF SUCH DEFENSE BY BORROWER, AND (II) PRIOR TO RETAINING SUCH COUNSEL
FOR SUCH PURPOSE, SUCH INDEMNIFIED PERSON SHALL CONSULT WITH BORROWER AND SHALL
ATTEMPT IN GOOD FAITH TO AGREE UPON COUNSEL TO CONDUCT THE DEFENSE ON BEHALF OF
BORROWER AND SUCH INDEMNIFIED PERSON, AND IN EACH CASE THE FEES AND
DISBURSEMENTS OF SUCH COUNSEL SHALL BE PAID BY BORROWER; PROVIDED, HOWEVER,
THAT IF SUCH MUTUAL AGREEMENT IS NOT REACHED WITHIN A REASONABLE TIME ON
SELECTING COUNSEL, THEN SUCH INDEMNIFIED PERSON MAY RETAIN ITS OWN COUNSEL AT
BORROWER'S EXPENSE.  NOTWITHSTANDING ANY CONTRARY PROVISION OF THIS AGREEMENT,
THE OBLIGATION OF BORROWER UNDER THIS SECTION 11.2 SHALL SURVIVE THE PAYMENT IN
FULL OF THE OBLIGATIONS AND THE TERMINATION OF THIS AGREEMENT.

         11.3    Modification of Agreement; Sale of Interest.  This Agreement
may not be modified, altered or amended, except by an agreement in writing
signed by Borrower and Lender.  Borrower may not sell, assign or transfer any
interest in this Agreement, any of the other Loan Documents, or any of the
Obligations, or any portion thereof, including Borrower's rights, title,
interests, remedies, powers, and duties hereunder or thereunder.  Borrower
hereby consents to Lender's participation, sale, assignment, transfer or other
disposition, at any time or times hereafter, of this Agreement and any of the
other Loan Documents, or of any portion hereof or thereof, including Lender's
rights, title, interests, remedies, powers, and duties hereunder or thereunder
to any Affiliate of Lender or any Person that purchases all or substantially
all of the assets of Lender.  Any other participation, sale, assignment,
transfer or other disposition, at any time or times hereafter, of this
Agreement and any of the other Loan Documents shall be subject to Borrower's
prior consent, such consent not to be unreasonably withheld.  If Lender
requests such consent in writing and Borrower does not respond in writing
within five (5) Business Days from the date of delivery of such request, the
consent of Borrower shall be deemed to have been given.  In the case of an
assignment, the assignee shall have, to the extent of such assignment, the same
rights, benefits and obligations as it would if it were "Lender" hereunder and
Lender shall be relieved of all obligations hereunder upon any such assignment.
Borrower agrees that it will use its best efforts to assist and cooperate with
Lender in any manner reasonably requested by Lender to effect the sale of
participations in or assignments of any of the Loan Documents or any portion
thereof or interest therein, including assisting in the preparation of
appropriate disclosure documents.  Borrower further agrees that Lender may
disclose credit information regarding Borrower and its Subsidiaries to any
potential Participant or assignee.

         11.4    Severability.  Wherever possible, each provision of this
Agreement shall be interpreted in such manner as to be effective and valid
under Applicable Law, but if any provision of this Agreement shall be
prohibited by or invalid under Applicable Law, such provision shall be
ineffective only to the extent of such prohibition or invalidity, without
invalidating the remainder of such provision or the remaining provisions of
this Agreement.

         11.5    Successors and Assigns.  This Agreement, the Other Agreements
and the Security Documents shall be binding upon and inure to the benefit of
the successors and assigns of Borrower and Lender permitted under Section 11.3
hereof.





                                       37
<PAGE>   43
         11.6    Cumulative Effect; Conflict of Terms.  The provisions of the
Other Agreements and the Security Documents are hereby made cumulative with the
provisions of this Agreement.  Except as otherwise provided in Section 3.2
hereof and except as otherwise provided in any of the other Loan Documents by
specific reference to the applicable provision of this Agreement, if any
provision contained in this Agreement is in direct conflict with, or
inconsistent with, any provision in any of the other Loan Documents, the
provision contained in this Agreement shall govern and control.

         11.7    Execution in Counterparts.  This Agreement may be executed in
any number of counterparts and by different parties hereto in separate
counterparts, each of which when so executed and delivered shall be deemed to
be an original and all of which counterparts taken together shall constitute
but one and the same instrument.

         11.8    Notice.  All notices, requests and demands to or upon a party
hereto shall be in writing and shall be sent by certified or registered mail,
return receipt requested, by personal delivery against receipt, by overnight
courier or by facsimile transmissions and shall be deemed to have been validly
served, given or delivered immediately when delivered against receipt or three
(3) Business Days after deposit in the mail, postage prepaid, or with an
overnight courier or, in the case of facsimile transmission, when sent,
answerback received, in each case addressed as follows:

                 If to Lender:             Fleet Capital Corporation
                                           2711 North Haskell Avenue
                                           Suite 2100, LB 21
                                           Dallas, Texas 75204
                                           Attention:  Loan Administration 
                                                       Manager
                                           Facsimile No.:  (214) 828-6530

                 With a copy to:           Patton Boggs, LLP
                                           2200 Ross Avenue, Suite 900
                                           Dallas, Texas 75201
                                           Attention:  Larry A. Makel, Esq.
                                           Facsimile No.:  (214) 871-2688

                 If to Borrower:           Bayard Drilling, L.P.
                                           4005 N.W. Expressway
                                           Oklahoma City, OK  73126
                                           Attention:  Mr. David E. Grose, III
                                           Facsimile No.: (405) 879-3847

                 With a copy to:           Baker & Botts, L.L.P.
                                           One Shell Plaza
                                           910 Louisiana
                                           Houston, Texas  77002-4995
                                           Attention:  Mr. Stephen Krebs
                                           Facsimile No.:  (713) 229-1522





                                      38
<PAGE>   44
                 If to Drilling LP:        4005 N.W. Expressway
                                           Oklahoma City, OK  73126
                                           Attention:  Mr. David E. Grose, III
                                           Facsimile No.: (405) 879-3847

                 With a copy to:           Baker & Botts, L.L.P.
                                           One Shell Plaza
                                           910 Louisiana
                                           Houston, Texas  77002-4995
                                           Attention:  Mr. Stephen Krebs
                                           Facsimile No.:  (713) 229-1522

or to such other address as each party may designate for itself by notice given
in accordance with this Section 11.8; provided, however, that any notice,
request or demand to or upon Lender pursuant to Section 3.1.1 or 4.2.2 hereof
shall not be effective until received by Lender.  Any written notice or demand
that is not sent in conformity with the provisions hereof shall nevertheless be
effective on the date that such notice is actually received by the noticed
party.

         11.9    Lender's Consent.  Unless otherwise provided herein, whenever
Lender's consent is required to be obtained under this Agreement, any of the
Other Agreements or any of the Security Documents as a condition to any action,
inaction, condition or event, Lender shall be authorized to give or withhold
such consent in its sole and absolute discretion.

         11.10   Credit Inquiries.  Borrower hereby authorizes and permits
Lender (but Lender shall have no obligation) to respond to usual and customary
credit inquiries from third parties concerning Borrower or any of its
Subsidiaries.

         11.11   Time of Essence.  Time is of the essence of this Agreement,
the Other Agreements and the Security Documents.

         11.12   Entire Agreement; Appendix A and Exhibits  and Schedules.
This Agreement and the other Loan Documents, together with all other
instruments, agreements and certificates executed by the parties in connection
therewith or with reference thereto, embody the entire understanding and
agreement between the parties hereto and thereto with respect to the subject
matter hereof and thereof and supersede all prior agreements, understandings
and inducements, whether express or implied, oral or written.  Appendix A and
each of the Exhibits  and Schedules attached hereto are incorporated into this
Agreement and by this reference made a part hereof.

         11.13   Interpretation.  No provision of this Agreement or any of the
other Loan Documents shall be construed against or interpreted to the
disadvantage of any party hereto by





                                       39
<PAGE>   45
any court or other governmental or judicial authority by reason of such party
having or being deemed to have structured or dictated such provision.

         11.14   GOVERNING LAW; CONSENT TO FORUM.  THIS AGREEMENT HAS BEEN
NEGOTIATED, EXECUTED AND DELIVERED AT AND SHALL BE DEEMED TO HAVE BEEN MADE IN
DALLAS, DALLAS COUNTY, TEXAS.  THIS AGREEMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS:  PROVIDED,
HOWEVER, THAT IF ANY OF THE COLLATERAL SHALL BE LOCATED IN ANY JURISDICTION
OTHER THAN TEXAS, THE LAWS OF SUCH JURISDICTION SHALL GOVERN THE METHOD, MANNER
AND PROCEDURE FOR FORECLOSURE OF LENDER'S LIEN UPON SUCH COLLATERAL AND THE
ENFORCEMENT OF LENDER'S OTHER REMEDIES IN RESPECT OF SUCH COLLATERAL TO THE
EXTENT THAT THE LAWS OF SUCH JURISDICTION ARE DIFFERENT FROM OR INCONSISTENT
WITH THE LAWS OF TEXAS.  AS PART OF THE CONSIDERATION FOR NEW VALUE RECEIVED,
AND REGARDLESS OF ANY PRESENT OR FUTURE DOMICILE OR PRINCIPAL PLACE OF BUSINESS
OF BORROWER OR LENDER, BORROWER HEREBY CONSENTS AND AGREES THAT THE DISTRICT
COURT OF DALLAS COUNTY, TEXAS, OR, AT LENDER'S OPTION, THE UNITED STATES
DISTRICT COURT FOR THE NORTHERN DISTRICT OF TEXAS, DALLAS DIVISION, SHALL HAVE
JURISDICTION TO HEAR AND DETERMINE ANY CLAIMS OR DISPUTES BETWEEN BORROWER AND
LENDER PERTAINING TO THIS AGREEMENT OR TO ANY MATTER ARISING OUT OF OR RELATED
TO THIS AGREEMENT.  BORROWER EXPRESSLY SUBMITS AND CONSENTS IN ADVANCE TO SUCH
JURISDICTION IN ANY ACTION OR SUIT COMMENCED IN ANY SUCH COURT, AND BORROWER
HEREBY WAIVES, TO THE EXTENT PERMITTED BY LAW, ANY OBJECTION WHICH BORROWER MAY
HAVE BASED UPON LACK OF PERSONAL JURISDICTION, IMPROPER VENUE OR FORUM NON
CONVENIENS AND HEREBY CONSENTS TO THE GRANTING OF SUCH LEGAL OR EQUITABLE
RELIEF AS IS DEEMED APPROPRIATE BY SUCH COURT.  BORROWER HEREBY WAIVES PERSONAL
SERVICE OF THE SUMMONS, COMPLAINT AND OTHER PROCESS ISSUED IN ANY SUCH ACTION
OR SUIT AND AGREES THAT SERVICE OF SUCH SUMMONS, COMPLAINT AND OTHER PROCESS
MAY BE MADE BY REGISTERED OR CERTIFIED MAIL ADDRESSED TO BORROWER AT THE
ADDRESS SET FORTH IN THIS AGREEMENT AND THAT SERVICE SO MADE SHALL BE DEEMED
COMPLETED UPON THE EARLIER OF BORROWER'S ACTUAL RECEIPT THEREOF OR THREE (3)
DAYS AFTER DEPOSIT IN THE U.S. MAILS, PROPER POSTAGE PREPAID.  NOTHING IN THIS
AGREEMENT SHALL BE DEEMED OR OPERATE TO AFFECT THE RIGHT OF LENDER TO SERVE
LEGAL PROCESS IN ANY OTHER MANNER PERMITTED BY LAW, OR TO PRECLUDE THE
ENFORCEMENT BY LENDER OF ANY JUDGMENT OR ORDER OBTAINED IN SUCH FORUM OR THE
TAKING OF ANY ACTION UNDER THIS AGREEMENT TO ENFORCE SAME IN ANY OTHER
APPROPRIATE FORUM OR JURISDICTION.





                                       40
<PAGE>   46

         11.15    WAIVERS BY BORROWER.  BORROWER WAIVES (I) THE RIGHT TO TRIAL
BY JURY (WHICH LENDER HEREBY ALSO WAIVES) IN ANY ACTION, SUIT, PROCEEDING OR
COUNTERCLAIM OF ANY KIND ARISING OUT OF OR RELATED TO ANY OF THE LOAN
DOCUMENTS, THE OBLIGATIONS OR THE COLLATERAL; (II) PRESENTMENT, DEMAND AND
PROTEST AND NOTICE OF PRESENTMENT, PROTEST, DEFAULT, NON- PAYMENT, INTENT TO
ACCELERATE, ACCELERATION, MATURITY, RELEASE, COMPROMISE, SETTLEMENT, EXTENSION
OR RENEWAL OF ANY OR ALL COMMERCIAL PAPER, ACCOUNTS, CONTRACT RIGHTS,
DOCUMENTS, INSTRUMENTS, CHATTEL PAPER AND GUARANTIES AT ANY TIME HELD BY LENDER
ON WHICH BORROWER MAY IN ANY WAY BE LIABLE AND HEREBY RATIFIES AND CONFIRMS
WHATEVER LENDER MAY DO IN THIS REGARD; (III) TO THE EXTENT PERMITTED BY LAW,
NOTICE PRIOR TO TAKING POSSESSION OR CONTROL OF THE COLLATERAL OR ANY BOND OR
SECURITY WHICH MIGHT BE REQUIRED BY ANY COURT PRIOR TO ALLOWING LENDER TO
EXERCISE ANY OF LENDER'S REMEDIES; (IV) TO THE EXTENT PERMITTED BY LAW, THE
BENEFIT OF ALL VALUATION, APPRAISEMENT AND EXEMPTION LAWS; AND (V) NOTICE OF
ACCEPTANCE HEREOF.  BORROWER ACKNOWLEDGES THAT THE FOREGOING WAIVERS ARE A
MATERIAL INDUCEMENT TO LENDER'S ENTERING INTO THIS AGREEMENT AND THAT LENDER IS
RELYING UPON THE FOREGOING WAIVERS IN ITS FUTURE DEALINGS WITH BORROWER.
BORROWER WARRANTS AND REPRESENTS THAT IT HAS REVIEWED THE FOREGOING WAIVERS
WITH ITS LEGAL COUNSEL AND HAS KNOWINGLY AND VOLUNTARILY WAIVED ITS JURY TRIAL
RIGHTS FOLLOWING CONSULTATION WITH LEGAL COUNSEL.  IN THE EVENT OF LITIGATION,
THIS AGREEMENT MAY BE FILED AS A WRITTEN CONSENT TO A TRIAL BY THE COURT.

         11.16   ORAL AGREEMENTS INEFFECTIVE.  THIS AGREEMENT AND THE OTHER
LOAN DOCUMENTS REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES, AND THE SAME
MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT
ORAL AGREEMENTS BETWEEN THE PARTIES.  THERE ARE NO UNWRITTEN ORAL AGREEMENTS
BETWEEN THE PARTIES.

         11.17   Nonapplicability of Chapter 346 of the Texas Finance Code.
Borrower and Lender hereby agree that, except for Section 15.10(b) thereof, the
provisions of Chapter 346 (other than Section 346.004 thereof) of the Texas
Finance Code (as amended from time to time, the "Texas Finance Code")
(regulating certain revolving credit loans and revolving tri-party accounts)
shall not apply to this Agreement or any of the other Loan Documents.

         11.18   Certain Matters of Construction.

                 (A)      References to Other Documents.  All references to
statutes and related regulations in this Agreement, the Other Agreements and
the Security Agreements shall include





                                       41
<PAGE>   47
any amendments of same and any successor statutes and regulations.  All
references in this Agreement, the Other Agreements and the Security Agreements
to any of the Loan Documents shall include any and all amendments and
modifications thereto and any and all extensions or renewals thereof.

                 (B)      Reference to Agreement; Obligations.  Each of the
Loan Documents, including this Agreement and any and all other agreements,
documents or instruments now or hereafter executed and delivered pursuant to
the terms hereof or pursuant to the terms of this Agreement as amended hereby,
are hereby amended so that any reference in such Loan Documents to this
Agreement shall mean a reference to the Agreement as amended and restated
hereby.  Borrower acknowledges and agrees that its obligations hereunder shall
constitute "Obligations" as defined in the Agreement and as used in the Loan
Documents.

         11.19   Release.  EACH OF BORROWER AND DRILLING LP ACKNOWLEDGES AND
AGREES THAT (A) IT HAS NO CLAIMS, COUNTERCLAIMS, OFFSETS, CREDITS OR DEFENSES
TO THE ORIGINAL LOAN DOCUMENTS AND THE PERFORMANCE OF ITS OBLIGATIONS
THEREUNDER, OR (B) IF IT HAS ANY SUCH CLAIMS, COUNTERCLAIMS, OFFSETS, CREDITS
OR DEFENSES TO THE ORIGINAL LOAN DOCUMENTS AND/OR ANY TRANSACTION RELATED TO
THE ORIGINAL LOAN DOCUMENTS, SAME ARE HEREBY WAIVED, RELINQUISHED AND RELEASED
IN CONSIDERATION OF LENDER'S EXECUTION AND DELIVERY OF THIS AGREEMENT.

         11.20   Amendment and Restatement.  This Agreement is given in
amendment, restatement, renewal and extension (and not in extinguishment or
satisfaction) of the Original Loan Agreement and, to the extent applicable, the
Original Loan Documents.  With respect to matters relating to the period prior
to the date hereof, all the provisions of the Original Loan Agreement and, to
the extent applicable, the Original Loan Documents are hereby ratified and
confirmed and shall remain in full force and effect.

         11.21   Joinder.  Drilling LP hereby agrees to join in this Agreement
for the limited purposes of making the representations and warranties, and
complying with the covenants, contained in Sections 6 and 7 hereof and agrees
to be bound by the terms and provisions thereof.  Nothing contained herein
shall in anyway limit or impair the obligations of Drilling LP with respect to
any Loan Document to which it is a party.


               [REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK]





                                       42
<PAGE>   48
         IN WITNESS WHEREOF, this Agreement has been duly executed in Dallas,
Texas, on the day and year specified at the beginning of this Agreement.


                                      BORROWER:
                                      
                                      BAYARD DRILLING TECHNOLOGIES,
                                      INC.
                                      
                                      
                                      By:     /s/ David E. Grose, III
                                             --------------------------------
                                      Name:  David E. Grose, III
                                      Title:    Chief Financial Officer
                                      
                                      Accepted in Dallas, Dallas County, Texas:
                                      
                                      LENDER:
                                      
                                      FLEET CAPITAL CORPORATION
                                      
                                      
                                      By:     /s/ Bruce Clark
                                             --------------------------------
                                      Name:  Bruce Clark
                                      Title:    Vice President
                                      
                                      Joined in for the purposes
                                      stated in Section 11.21.
                                      
                                      BAYARD DRILLING, L.P.
                                      By:    Bayard Drilling, L.L.C.,
                                             its general partner
                                      
                                      
                                      By:     /s/ David E. Grose, III
                                             --------------------------------
                                      Name:  David E. Grose, III
                                      Title:    Chief Financial Officer





Amended and Restated L&S
<PAGE>   49
                                   APPENDIX A

                              GENERAL DEFINITIONS

         When used in the Amended and Restated Loan and Security Agreement
dated as of June 18, 1998, by and between Fleet Capital Corporation, Bayard
Drilling Technologies, Inc., and joined in by Bayard Drilling, L.P., the
following terms shall have the following meanings (terms defined in the
singular to have the same meaning when used in the plural and vice versa):

                 Account Debtor - any Person who is or may become obligated
         under or on account of an Account.

                 Accounts - all accounts, contract rights, chattel paper,
         instruments and documents, whether now owned or hereafter created or
         acquired by Drilling LP or in which Drilling LP now has or hereafter
         acquires any interest.

                 Affiliate - a Person (other than a Subsidiary):  (i) which
         directly or indirectly through one or more intermediaries controls, or
         is controlled by, or is under common control with, a Person; (ii)
         which beneficially owns or holds 10% or more of any class of the
         Voting Stock of a Person; or (iii) 10% or more of the Voting Stock (or
         in the case of a Person which is not a corporation,  10% or more of
         the equity interest) of which is beneficially owned or held by a
         Person or a Subsidiary of a Person.

                 Agreement - the Loan and Security Agreement referred to in the
         first sentence of this Appendix A, all Exhibits  and Schedules thereto
         and this Appendix A, as amended, renewed, extended and restated from
         time to time.

                 Allowed Affiliate Accounts - each Account receivable from Ward
         or AnSon Company which arises in the ordinary course of Drilling LP's
         business from the sale of goods or rendition of services to such
         Persons and which is payable in Dollars. Without limiting the
         generality of the foregoing, no Account shall be an Allowed Affiliate
         Account if:  (i)  it is due or unpaid more than 90 days after the
         original invoice date; (ii) 20% or more of the Accounts from the
         Account Debtor are due and unpaid more than 60 days from invoice date
         or otherwise are not deemed Allowed Affiliate Accounts hereunder
         (subject, however, to redeterminations by Lender if Drilling LP's
         provides written evidence to Lender reflecting that sufficient
         payments have been made on such Accounts between the date of
         determination of eligibility and the date the Schedule of Accounts was
         delivered to Lender to merit their inclusion in a Borrowing Base
         determination); (iii) any covenant, representation or warranty
         contained in the Agreement with respect to such Account has been
         breached; (iv) the Account Debtor has disputed liability with respect
         to such Account, or the Account Debtor has made any claim with respect
         to any other Account due from such Account Debtor to Drilling LP, or
         the Account otherwise is or may become subject to any right of setoff,
         counterclaim, reserve or chargeback, provided that, in any event, the
         Accounts of such Account Debtor shall be ineligible only to the extent
         of the amount owing by Drilling LP to such creditor or





                                     A-1-1
<PAGE>   50
         supplier or to the extent of such offset, counterclaim, disputed
         amount, reserve or chargeback; (v) the Account Debtor has commenced a
         voluntary case under the federal bankruptcy laws or made an assignment
         for the benefit of creditors, or a decree or order for relief has been
         entered by a court having jurisdiction in the proceedings in respect
         of the Account Debtor in an involuntary case under the federal
         bankruptcy laws or any other petition or other application for relief
         under the federal bankruptcy laws has been filed against the Account
         Debtor, or if the Account Debtor has failed, suspended business,
         ceased to be Solvent, or consented to or suffered a receiver, trustee,
         liquidator or custodian to be appointed for it or for all or a
         significant portion of its assets or affairs; (vi) it arises from a
         sale to an Account Debtor with its principal office, assets or place
         of business outside the United States, unless the sale is backed by an
         irrevocable letter of credit issued or confirmed by Bank and is in
         form and substance acceptable to Lender, payable in the full amount of
         the Account in freely convertible Dollars at a place of payment within
         the United States; (vii) it arises from a sale to the Account Debtor
         on a bill-and-hold, guaranteed sale, sale-or-return, sale-on-approval,
         consignment or any other repurchase or return basis; (viii) the
         Account Debtor has relocated to New Jersey, Minnesota, Indiana, West
         Virginia or any other state imposing similar conditions on the right
         of a creditor to collect accounts receivable unless Drilling LP has
         either qualified to transact business in such state as a foreign
         corporation or filed a Notice of Business Activities Report or other
         required report with the appropriate officials in those states for the
         then current year; (ix) the Account is subject to a Lien other than a
         Permitted Lien; (x) the goods giving rise to such Account have not
         been delivered to and accepted by the Account Debtor or the services
         giving rise to such Account have not been performed by Drilling LP and
         accepted by the Account Debtor or the Account otherwise does not
         represent a final sale; (xi) the Account is evidenced by chattel paper
         or an instrument of any kind, or has been reduced to judgment; (xii)
         Drilling LP has made any agreement with the Account Debtor for any
         deduction therefrom, except for discounts or allowances which are made
         in the ordinary course of business for prompt payment and which
         discounts or allowances are reflected in the calculation of the face
         value of each invoice related to such Account; or (xiii) Drilling LP
         has made an agreement with the Account Debtor to extend the time of
         payment thereof.

                 Amendment Date - the date first written hereinabove.

                 AnSon Company - AnSon Company, an Oklahoma general
         partnership.

                 Applicable Annual Rate - as defined in Section 2.1.1 of the
         Agreement.

                 Applicable Law - all laws, rules and regulations applicable to
         the Person, conduct, transaction, covenant or Loan Documents in
         question, including all applicable common law and equitable
         principles; all provisions of all applicable state and federal
         constitutions, statutes, rules, regulations and orders of governmental
         bodies; and orders, judgments and decrees of all courts and
         arbitrators.





                                     A-1-2
<PAGE>   51
                 Availability - the amount of money which Borrower is entitled
         to borrow from time to time as Revolving Credit Loans, such amount
         being the difference derived when the sum of the principal amount of
         Revolving Credit Loans then outstanding (including any amounts which
         Lender may have paid for the account of Borrower pursuant to any of
         the Loan Documents and which have not been reimbursed by Borrower) and
         the LC Amount is subtracted from the Borrowing Base.  If the amount
         outstanding is equal to or greater than the Borrowing Base,
         Availability is 0.

                 Average Monthly Revolving Credit Balance - the amount obtained
         by adding the aggregate unpaid principal amount of Revolving Credit
         Loans plus the LC Amount at the end of each day during the month in
         question and by dividing such sum by the number of days in such month.

                 Bank - Fleet National Bank, and its successors or assigns.

                 Base Rate - the rate of interest announced or quoted by Bank
         from time to time as its prime rate for commercial loans, whether or
         not such rate is the lowest rate charged by Bank to its most preferred
         borrowers; and, if such prime rate for commercial loans is
         discontinued by Bank as a standard, a comparable reference rate
         designated by Bank as a substitute therefor shall be the Base Rate.

                 Bonray - Bonray Drilling Corporation, a Delaware Corporation.

                 Borrowing Base - as at any date of determination thereof, an
         amount equal to the lesser of:

                          (a)     Total Credit Facility; or

                          (b)     an amount equal to:

                                  (i)      80% of the net amount of Eligible
                          Accounts outstanding at such date;

                                      PLUS

                                  (ii)     50% of the net amount of Turnkey
                          Accounts;

                                      PLUS

                                  (iii)    the lesser of (x) 80% of the net
                          amount of Allowed Affiliate Accounts and (y)
                          $5,000,000; or

                          (c)     the Maximum Guaranteed Amount as such term is
                 defined in the Guaranty Agreement of Drilling LP





                                     A-1-3
<PAGE>   52
                          MINUS (subtract from the amount of clauses (a), (b)
                 or (c) above) the sum of (i) the LC Amount, plus (ii) the
                 amount of any reserves established by Lender pursuant to
                 Section 1.1.1 at such date.

                 For purposes of clauses (b)(i), (b)(ii) and (b)(iii) hereof,
         the net amount of Eligible Accounts, Turnkey Accounts, and Allowed
         Affiliate Accounts, as the case may be, at any time shall be the face
         amount of such Accounts less any and all returns, rebates, discounts
         (which may, at Lender's option, be calculated on shortest terms),
         credits, allowances or sales, excise or withholding taxes of any
         nature at any time issued, owing, claimed by Account Debtors, granted,
         outstanding or payable in connection with such Accounts at such time.

                 Business Day - any day excluding Saturday, Sunday and any day
         which is a legal holiday under the laws of the state of Texas or is a
         day on which banking institutions located in such state are closed.

                 Capitalized Lease Obligation - any Indebtedness represented by
         obligations under a lease that is required to be capitalized for
         financial reporting purposes in accordance with GAAP.

                 Cash Flow - means, for any period, the sum of Borrower's and
         all Subsidiaries consolidated net income plus depreciation, depletion
         and amortization less dividends paid and extraordinary items of income
         or loss (as determined in accordance with GAAP) in the prior four
         quarters.  Cash Flow shall exclude the Cash Flow attributable to any
         Unrestricted Subsidiary.

                 Cash Flow will be calculated as as of June 30, 1998 and for
         all subsequent periods as the sum of the actual Cash Flow for the then
         preceding twelve months.

                 Cash Flow Coverage Ratio - means the ratio of Cash Flow to
         Projected Debt Service.

                 CIT - The CIT Group/Equipment Financing, Inc., a New York
         corporation.

                 CIT Debt - means any and all indebtedness, claims, debts,
         liabilities, or obligations of Borrower owing to CIT, individually and
         as agent for CIT and Lender, and Lender, of whatever nature,
         character, or description, arising solely as a result of the loans
         made pursuant to the CIT Loan Agreement, as amended, but in no event
         shall such CIT Debt exceed $19,000,000 plus accrued interest in the
         aggregate.

                 CIT Loan Agreement - means that certain Loan Agreement, dated
         as of December 10, 1996, by and between CIT and Borrower, as amended
         and restated as of May 1, 1997 and as of June 18, 1998, by and between
         CIT, Lender, CIT as agent for CIT and Lender, and Borrower, and any
         and all other agreements, documents and instruments currently or
         hereafter entered into by and between Borrower, CIT, Lender, and CIT
         as agent for CIT





                                     A-1-4
<PAGE>   53
         and Lender, or executed by Borrower in favor of, or to the order of,
         CIT, Lender, and CIT as agent for CIT and Lender, in connection with
         such Loan Agreement.

                 Closing Date - the date on which all of the conditions
         precedent in Section 9 of the Agreement are satisfied and the initial
         Loan is made or the initial Letter of Credit or LC Guaranty is issued
         under the Agreement.

                 Code - the Uniform Commercial Code as adopted and in force in
         the state of Texas, as from time to time in effect.

                 Collateral - all of the Property and interests in Property
         described in Section 5 of the Agreement, and all other Property and
         interests in Property that now or hereafter secure the payment and
         performance of any of the Obligations, including, without limitation,
         the "Collateral" as defined in the Security Agreements.

                 Consolidated - the consolidation in accordance with GAAP of
         the accounts or other items as to which such term applies.

                 Current Assets - at any date means the amount at which all of
         the current assets of a Person would be properly classified as current
         assets shown on a balance sheet at such date in accordance with GAAP.

                 Default - an event or condition the occurrence of which would,
         with the lapse of time or the giving of notice, or both, become an
         Event of Default.

                 Default Rate - as defined in Section 2.1.2 of the Agreement.

                 Dollars and the sign "$" - lawful money of the United States
         of America.

                 Dominion Account - a special account of Lender established by
         Drilling LP pursuant to the Agreement at a bank selected by Borrower
         and Drilling LP, but acceptable to Lender in its reasonable
         discretion, and over which Lender shall have sole and exclusive access
         and control for withdrawal purposes.

                 Drilling Contracts - any and all drilling contracts and any
         and all rights thereunder, including but not limited to the right to
         receive payments due or to become due, as associated with or to the
         Drilling Rigs.

                 Drilling LLC - Bayard Drilling, L.L.C. a Delaware limited
         liability company.

                 Drilling LP -  Bayard Drilling, L.P., a  Delaware limited
         partnership.

                 Drilling Rigs - the land drilling rigs and drilling equipment
         identified on Exhibit P to the Agreement, the ownership of which has
         been assigned from Borrower to Drilling LP, and all metal products,
         machinery, equipment, materials or other goods of any





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         description whatsoever, used or acquired for use by Borrower and all
         pumps, drilling equipment, drill pipe, machinery, equipment, supplies,
         parts and other goods of any description whatsoever installed in or
         affixed to or to be used in connection with any Drilling Rig or
         acquired for installation on, affixation to, or use in connection with
         any Drilling Rig.

                 Eligible Account - an Account (other than a Turnkey Account)
         arising in the ordinary course of Drilling LP's business from the sale
         of goods or rendition of services which is payable in Dollars and
         which Lender, in its sole credit judgment, deems to be an Eligible
         Account.  Without limiting the generality of the foregoing, no Account
         shall be an Eligible Account if:  (i) it arises out of a sale made by
         Drilling LP to a Subsidiary or an Affiliate of Drilling LP or to a
         Person controlled by an Affiliate of Drilling LP, including, without
         limitation, any Allowed Affiliate Account; (ii) it is due or unpaid
         more than 90 days after the original invoice date; (iii) 20% or more
         of the Accounts from the Account Debtor are due and unpaid more than
         60 days from invoice date or otherwise are not deemed Eligible
         Accounts hereunder; (iv) the total unpaid Accounts of the Account
         Debtor exceed 20% of the net amount of all Eligible Accounts
         (excluding Accounts receivable from Chesapeake, Union Pacific Resource
         Corporation and Sonat Exploration Company, to the extent of such
         excess; (v) any covenant, representation or warranty contained in the
         Agreement with respect to such Account has been breached; (vi) the
         Account Debtor, other than Chesapeake, is also Drilling LP's creditor
         or supplier, or the Account Debtor has disputed liability with respect
         to such Account, or the Account Debtor has made any claim with respect
         to any other Account due from such Account Debtor to Drilling LP, or
         the Account otherwise is or may become subject to any right of setoff,
         counterclaim, reserve or chargeback, provided that, in any event, the
         Accounts of such Account Debtor shall be ineligible only to the extent
         of the amount owing by Drilling LP to such creditor or supplier or to
         the extent of such offset, counterclaim, disputed amount, reserve or
         chargeback; (vii) the Account Debtor has commenced a voluntary case
         under the federal bankruptcy laws or made an assignment for the
         benefit of creditors, or a decree or order for relief has been entered
         by a court having jurisdiction in the proceedings in respect of the
         Account Debtor in an involuntary case under the federal bankruptcy
         laws or any other petition or other application for relief under the
         federal bankruptcy laws has been filed against the Account Debtor, or
         if the Account Debtor has failed, suspended business, ceased to be
         Solvent, or consented to or suffered a receiver, trustee, liquidator
         or custodian to be appointed for it or for all or a significant
         portion of its assets or affairs; (viii) it arises from a sale to an
         Account Debtor with its principal office, assets or place of business
         outside the United States, unless the sale is backed by an irrevocable
         letter of credit issued or confirmed by Bank and is in form and
         substance acceptable to Lender, payable in the full amount of the
         Account in freely convertible Dollars at a place of payment within the
         United States; (ix) it arises from a sale to the Account Debtor on a
         bill-and-hold, guaranteed sale, sale-or-return, sale-on-approval,
         consignment or any other repurchase or return basis; (x) (a) the
         Account Debtor is the United States of America or any department,
         agency or instrumentality thereof, unless Drilling LP assigns its
         right to payment of such Account to Lender, in a manner satisfactory
         to Lender, so as to comply with the Assignment of Claims Act of 1940
         (31





                                     A-1-6
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         U.S.C. Section 203 et seq.) or (b) the Account Debtor is a state,
         county or municipality, or a political subdivision or agency thereof,
         which is subject to any Applicable Law that would disallow an
         assignment of Accounts on which it is the Account Debtor; (xi) the
         Account Debtor is located in New Jersey, Minnesota, Indiana, West
         Virginia or any other state imposing similar conditions on the right
         of a creditor to collect accounts receivable unless Drilling LP has
         either qualified to transact business in such state as a foreign
         corporation or filed a Notice of Business Activities Report or other
         required report with the appropriate officials in those states for the
         then current year; (xii) the Account is subject to a Lien other than a
         Permitted Lien; (xiii) the goods giving rise to such Account have not
         been delivered to and accepted by the Account Debtor or the services
         giving rise to such Account have not been performed by Drilling LP and
         accepted by the Account Debtor or the Account otherwise does not
         represent a final sale; (xiv) the Account is evidenced by chattel
         paper or an instrument of any kind, or has been reduced to judgment;
         (xv) Drilling LP has made any agreement with the Account Debtor for
         any deduction therefrom, except for discounts or allowances which are
         made in the ordinary course of business for prompt payment and which
         discounts or allowances are reflected in the calculation of the face
         value of each invoice related to such Account; or (xvi) Drilling LP
         has made an agreement with the Account Debtor to extend the time of
         payment thereof.

                 El Reno Property - That certain parcel of real property
         located in El Reno, Canadian County, Oklahoma and upon which Trend
         granted to Lender a mortgage in connection with the Original Loan
         Agreement.

                 Environmental Laws - all federal, state and local laws, rules,
         regulations, ordinances, programs, permits, guidances, orders and
         consent decrees relating to health, safety or environmental matters.

                 ERISA - the Employee Retirement Income Security Act of 1974,
         as amended, and all rules and regulations from time to time
         promulgated thereunder.

                 Event of Default - as defined in Section 10.1 of the
         Agreement.

                 Excess Interest - as defined in Section 2.1.3(B) of the
         Agreement.

                 GAAP - generally accepted account principles in the United
         States of America in effect from time to time.

                 General Intangibles - all general intangibles of Borrower,
         whether now owned or hereafter created or acquired by Borrower,
         including all choices in action, causes of action, corporate or other
         business records, deposit accounts, inventions, blueprints, designs,
         patents, patent applications, trademarks, trademark applications,
         trade names, trade secrets, service marks, goodwill, brand names,
         copyrights, registrations, licenses, franchises, customer lists, tax
         refund claims, computer programs, operational manuals, all claims
         under guaranties, security interests or other security held by or
         granted to





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         Borrower to secure payment of any of the Accounts by an Account
         Debtor, all rights to indemnification and all other intangible
         property of every kind and nature (other than Accounts), and excluding
         drilling contracts other than the Drilling Contracts.

                 Guarantors - collectively, Drilling LP, Drilling LLC, Trend
         and Bonray and any other or future guarantor of the Obligations.

                 Guaranty Agreements - collectively, the Continuing Guaranty
         Agreements executed by each of Drilling LP, Drilling LLC, Trend and
         Bonray.

                 Indebtedness - shall have the meaning ascribed thereto in the
         Indenture; and in the case of Borrower (without duplication), shall
         include the Obligations.

                 Indemnified Persons - as defined in Section 11.2 of the
         Agreement.

                 Inventory - all of Borrower's inventory, whether now owned or
         hereafter acquired, including, but not limited to, all goods intended
         for sale or lease by Borrower, or for display or demonstration; all
         work in process; all raw materials and other materials and supplies of
         every nature and description used or consumed in Borrower's business;
         and all documents evidencing and General Intangibles relating to any
         of the foregoing, whether now owned or hereafter acquired by Borrower,
         excluding, however, all Inventory associated with any drilling rig
         other than the Drilling Rigs.

                 LC Amount - at any time, the aggregate undrawn face amount of
         all Letters of Credit and LC Guaranties then outstanding.

                 LC Guaranty - any guaranty pursuant to which Lender or any
         Affiliate of Lender shall guaranty the payment or performance by
         Borrower of its reimbursement obligation under any letter of credit.

                 Letter of Credit - any letter of credit issued by Lender or
         any of Lender's Affiliates for the account of Borrower.

                 Lien - any interest in Property securing an obligation owed
         to, or a claim by, a Person other than the owner of the Property,
         whether such interest is based on common law, statute or contract.
         The term "Lien" shall also include reservations, exceptions,
         encroachments, easements, rights-of-way, covenants, conditions,
         restrictions, leases and other title exceptions and encumbrances
         affecting Property.  For the purpose of the Agreement, Borrower shall
         be deemed to be the owner of any Property which it has acquired or
         holds subject to a conditional sale agreement or other arrangement
         pursuant to which title to the Property has been retained by or vested
         in some other Person for security purposes.

                 Loan Account - the loan account established on the books of
         Lender pursuant to Section 3.4 of the Agreement.





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<PAGE>   57
                 Loan Documents - the Agreement, the Other Agreements and the
         Security Documents.

                 Loan Party - Borrower and each other Person (other than
         Lender) who is at any time a party to any Loan Document.

                 Loans - all loans and advances of any kind made by Lender
         pursuant to the Agreement.

                 Losses - as defined in Section 11.2 of the Agreement.

                 Material Adverse Effect - the effect of any event or condition
         which, alone or when taken together with other events or conditions
         occurring or existing concurrently therewith, (a) has a material
         adverse effect upon the business, operations, Properties, condition
         (financial or otherwise) or business prospects of Borrower and its
         Subsidiaries, including without limitation, Drilling LP, taken as a
         whole; (b) has any material adverse effect whatsoever upon the
         validity or enforceability of any material provisions of the Agreement
         or any of the other Loan Documents; (c) has or may be reasonably
         expected to have any material adverse effect upon the value of the
         whole or any material part of the Collateral, the Liens of Lender with
         respect to the Collateral or any material part thereof or the priority
         of such Liens; (d) materially impairs the ability of Borrower and the
         other Loan Parties, taken as a whole, to perform their material
         obligations under this Agreement or any of the other Loan Documents,
         including repayment of the Obligations when due; or (e) materially
         impairs the ability of Lender to enforce or collect the Obligations or
         realize upon any of the Collateral in accordance with the Loan
         Documents and Applicable Law.

                 Maximum Legal Rate - as defined in Section 2.1.3(A) of the 
         Agreement.

                 Money Borrowed - means (i) Indebtedness arising from the
         lending of money by any Person to Borrower or any Subsidiary; (ii)
         Indebtedness, whether or not in any such case arising from the lending
         by any Person of money to Borrower or any Subsidiary, (A) which is
         represented by notes payable or drafts accepted that evidence
         extensions of credit, (B) which constitutes obligations evidenced by
         bonds, debentures, notes or similar instruments, or (C) upon which
         interest charges are customarily paid (other than accounts payable) or
         that was issued or assumed as full or partial payment for Property,
         other than accounts payable; (iii) Indebtedness that constitutes a
         Capitalized Lease Obligation; (iv) reimbursement obligations with
         respect to letters of credit or guaranties of letters of credit and
         (v) Indebtedness of Borrower or any Subsidiary under any guaranty of
         obligations that would constitute Indebtedness for Money Borrowed
         under clauses (i) through (iii) hereof, if owed directly by Borrower.

                 Mortgage - the mortgage or deed of trust to be executed by
         Borrower in favor of Lender by which Borrower shall grant and convey
         to Lender, as security for the





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<PAGE>   58
         Obligations, a Lien upon the real Property owned in fee by Borrower,
         located at El Reno, Oklahoma.

                 Multiemployer Plan - has the meaning set forth in Section
         4001(a)(3) of ERISA.

                 Obligations - all Loans, and all other advances, debts,
         liabilities, obligations, covenants and duties, together with all
         interest, fees and other charges thereon, owing, arising, due or
         payable from Borrower to Lender of any kind or nature, present or
         future, whether or not evidenced by any note, guaranty or other
         instrument, whether arising under the Agreement or any of the other
         Loan Documents or otherwise, and whether direct or indirect (including
         those acquired by assignment), absolute or contingent, primary or
         secondary, due or to become due, now existing or hereafter arising and
         however acquired.

                 Original Term - as defined in Section 4.1 of the Agreement.

                 Original Loan Agreement - that certain Loan and Security
         Agreement dated as of May 1, 1997 between Trend, Borrower and Lender.

                 Original Loan Documents - the Loan Documents as defined in the
         Original Loan Agreement.

                 Other Agreements - any and all agreements, instruments and
         documents (other than the Agreement and the Security Documents),
         heretofore, now or hereafter executed by Borrower, any Subsidiary of
         Borrower or any other third party and delivered to Lender in respect
         of the transactions contemplated by the Agreement.

                 Out-of-Formula Condition - at any date of determination
         thereof, a condition such that the outstanding principal amount of
         Revolving Credit Loans plus the LC Amount on such date exceeds the
         Borrowing Base on such date.

                 Participant - each Person who shall be granted the right by
         Lender to participate in any of the Loans described in the Agreement
         and who shall have entered into a participation agreement in form and
         substance satisfactory to Lender.

                 Permitted Indebtedness - shall have the meaning ascribed
         thereto in the Indenture.

                 Permitted Lien - a Lien of a kind specified in Section 8.2.5
         of the Agreement.

                 Person - an individual, partnership, corporation, limited
         liability company, joint stock company, land trust, business trust, or
         unincorporated organization, or a government or agency or political
         subdivision thereof.

                 Plan - an employee benefit plan now or hereafter maintained
         for employees of Borrower that is covered by Title IV of ERISA.





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                 Projected Debt Service - means the sum of the current portion
         of Borrower's and each Subsidiaries' long term debt and capitalized
         lease obligations coming due in the following four quarters, including
         any maturities of the Loans associated with this Agreement.  Projected
         Debt Service shall exclude the Projected Debt Service attributable to
         any Unrestricted Subsidiary.

                 Properly Contested - in the case of any Indebtedness of a Loan
         Party (including any Taxes) that is not paid as and when due or
         payable by reason of such Loan Party's bona fide dispute concerning
         its liability to pay same or concerning the amount thereof, that (i)
         such Indebtedness and any Liens securing same are being properly
         contested in good faith by appropriate proceedings promptly instituted
         and diligently conducted, (ii) such Loan Party has established
         appropriate reserves as shall be required in conformity with GAAP,
         (iii) the non-payment of such Indebtedness will not have a Material
         Adverse Effect and will not result in a forfeiture of any assets of
         such Loan Party; (iv) no Lien is imposed upon any of such Loan Party's
         assets with respect to such Indebtedness unless such Lien is at all
         times junior and subordinate in priority to the Liens in favor of
         Lender (except only with respect to property taxes that have priority
         as a matter of applicable state law); (v) if the Indebtedness results
         from the entry, rendition or issuance against a Loan Party or any of
         its assets of a judgment, writ, order or decree, such judgment, writ,
         order or decree is stayed or bonded pending a timely appeal or other
         judicial review; and (vi) if such contest is abandoned, settled or
         determined adversely to such Loan Party, such Loan Party forthwith
         pays such Indebtedness and all penalties and interest in connection
         therewith.

                 Property - any interest in any kind of property or asset,
         whether real, personal or mixed, or tangible or intangible.

                 Rentals - as defined in Section 8.2.13 of the Agreement.

                 Reportable Event - any of the events set forth in Section
         4043(b) of ERISA.

                 Revolving Credit Loan - a Loan made by Lender as provided in
         Section 1.1 of the Agreement.

                 Schedule of Accounts - as defined in Section 6.2.1 of the
         Agreement.

                 Security - shall have the same meaning as in Section 2(1) of
         the Securities Act of 1933, as amended.

                 Security Agreements - collectively, the Security Agreements
         executed by each of Drilling LLP, Drilling LLC, Trend and Bonray.





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                 Security Documents - the Guaranty Agreements, Security
         Agreements, and all other instruments and agreements now or at any
         time hereafter securing the whole or any part of the Obligations.

                 Senior Debt - means all Money Borrowed, excluding Subordinated
         Debt.

                 Solvent - as to any Person, such Person (i) owns Property
         whose fair salable value is greater than the amount required to pay
         all of such Person's Indebtedness (including contingent debts), (ii)
         is able to pay all of its Indebtedness as such Indebtedness matures
         and (iii) has capital sufficient to carry on its business and
         transactions and all business and transactions in which it is about to
         engage.

                 Subordinated Debt - Indebtedness of Borrower or any Subsidiary
         that is subordinated to the Obligations in a manner satisfactory to
         Lender.

                 Subsidiary - any corporation of which a Person owns, directly
         or indirectly through one or more intermediaries, more than 50% of the
         Voting Stock at the time of determination or any association or other
         business entity of which more than fifty percent (50%) of the total
         voting power of shares of stock (or equivalent ownership or
         controlling interest) entitled (without regard to the occurrence of
         any contingency) to vote in the election of directors, managers or
         trustees thereof, or to vote in matters relating to the partnership if
         a partnership, is at the time owned or controlled, directly or
         indirectly, by that Person or one or more of the other subsidiaries of
         that Person or a combination thereof.  Notwithstanding the foregoing,
         the term Subsidiary shall include all Guarantors whether or not
         included within the foregoing and shall exclude any Unrestricted
         Subsidiary.

                 Tangible Net Worth - means, at a particular date, the sum of
         the Borrowers' capital stock (excluding treasury stock), warrants,
         surplus (including earned surplus, capital surplus and the balance of
         the current profit and loss account not transferred to surplus) and
         debt that is specifically subordinated to the Obligations on the terms
         acceptable to the Lender accounted on a consolidated basis appearing
         on a consolidated balance sheet prepared in accordance with GAAP as of
         the date of determination, and after deducting therefrom the net book
         value of all assets (after deducting any reserves applicable thereto)
         which would be treated as intangibles under GAAP (including, without
         limitation, such items as goodwill, trademarks, trade names, patents
         and licenses, franchises and operating rights) and excluding the
         amount of the Borrowers' equity investment in any Unrestricted
         Subsidiary.

                 Taxes - any present or future taxes, levies, imposts, duties,
         fees, assessments, deductions, withholdings or other charges of
         whatever nature, including, without limitation, income, receipts,
         excise, property, sales, transfer, license, payroll, withholding,
         social security and franchise taxes now or hereafter imposed or levied
         by the United States, or any state, local or foreign government or by
         any department, agency or other





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         political subdivision or taxing authority thereof or therein and all
         interest, penalties, additions to tax and similar liabilities with
         respect thereto.

                 Total Credit Facility - $10,000,000.

                 Total Liabilities - means indebtedness of the Borrower and its
         Subsidiaries on a consolidated basis which would in accordance with
         GAAP be classified as current and long term liabilities of a
         corporation conducting a business the same as or similar to the
         Borrower and its Subsidiaries, but excluding debt that is specifically
         subordinated to the Obligations on terms acceptable to the Lender and
         total liabilities of any Unrestricted Subsidiary.

                 Trend - Trend Drilling Co., and Oklahoma corporation.

                 Turnkey Accounts - Accounts arising from oil or gas drilling
         contracts between Drilling LP and owners or operators of oil or gas
         wells pursuant to which Drilling LP assumes primary control over
         drilling activity, and is responsible for subcontracting related
         services.

                 Unrestricted Subsidiary - Any Subsidiary of the Borrower that
         the Borrower has clarified as an Unrestricted Subsidiary under the
         Indenture and that has not been reclassified as a Subsidiary pursuant
         to the terms of the Indenture.

                 Voting Stock - Securities of any class or classes of a
         corporation the holders of which are ordinarily, in the absence of
         contingencies, entitled to elect a majority of the corporate directors
         (or Persons performing similar functions).

                 Ward - Ward Drilling Company.

         TERMS DEFINED IN INDENTURE.  Capitalized terms used in this Agreement
but not otherwise defined herein, or specifically referenced to the Indenture
for their meaning, shall have the meaning given them in that certain Offering
Memorandum dated June 19, 1998, pursuant to which Borrower is offering senior
notes in an aggregate principal amount not to exceed $100,000,000, without
giving any effect to any amendments or modifications thereto after the date
thereof ("Indenture"), a copy of which is attached hereto as Exhibit Q.

         OTHER TERMS.  All other terms contained in the Agreement shall have,
when the context so indicates, the meanings provided for by the Code to the
extent the same are used or defined therein.

         CERTAIN MATTERS OF CONSTRUCTION.  The terms "herein", "hereof" and
"hereunder" and other words of similar import refer to the Agreement as a whole
and not to any particular section, paragraph or subdivision.  Any pronoun used
shall be deemed to cover all genders.  In the computation of periods of time
from a specified date to a later specified date, the word "from"





                                     A-1-13
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means "from and including" and the words "to" and "until" each means "to but
excluding."  The section titles, table of contents and list of Exhibits  appear
as a matter of convenience only and shall not affect the interpretation of the
Agreement.  All references to statutes and related regulations shall include
any amendments of same and any successor statutes and regulations.  All
references to any of the Loan Documents shall include any and all modifications
thereto and any and all extensions or renewals thereof.  Wherever the phrase
"including" shall appear in the Agreement, such word shall be understood to
mean "including, without limitation."

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