Document:

<PAGE>

                                  ADDENDUM II
                                      TO
                        SPRINT PCS MANAGEMENT AGREEMENT

Manager:         Texas Unwired, a Louisiana general partnership

Service Area:    Beaumont-Port Arthur, TX BTA
                 Lufkin - Nacogdoches, TX, BTA

     This Addendum II dated as of October 12, 2000, contains certain additional
and supplemental terms and provisions to that certain Sprint PCS Management
Agreement entered into as of January 7, 2000, by the same parties as this
Addendum, which Management Agreement was further amended by that certain
Addendum I entered into as of January 7, 2000 (the Management Agreement, as
amended by Addendum I, being the "MANAGEMENT AGREEMENT"). The terms and
provisions of this Addendum control, supersede and amend any conflicting terms
and provisions contained in the Management Agreement.  Except for express
modifications made in this Addendum, the Agreement continues in full force and
effect.

     Capitalized terms used and not otherwise defined in this Addendum have the
meanings ascribed to them in the Management Agreement.  Section and Exhibit
references are to Sections of, and Exhibits to, the Management Agreement, unless
otherwise noted.

     The Management Agreement is modified as follows:

     1.  DELETION OF SECTIONS FROM ADDENDUM I. Sections 19, 20 and 21 of
Addendum I are deleted in their entirety and of no effect from the date of this
Addendum.

     2.  LONG-DISTANCE PRICING.  (a) The first sentence of Section 3.4 is
deleted in its entirety and replaced with the following language:

               Prior to May 1, 2002, Manager may purchase from Cameron
          Communications Corporation long-distance telephony services used in
          the provision of Sprint PCS Products and Services in the Service Area
          served by the Manager's two existing switches located in Shreveport,
          Louisiana. If, during the period from the date of this addendum until
          May 1, 2002, Manager does not purchase or retain long-distance
          telephony services from Cameron Communications Corporation used in the
          provision of Sprint PCS Products and Services in the Service Area,
          Manager must purchase long-distance telephony services from Sprint or
          Sprint PCS, at Sprint PCS' discretion.

               On and after May 1, 2002, Manager must purchase, exclusively,
          from Sprint or Sprint PCS, at Sprint PCS' discretion, all long-
          distance telephony services used in the provision of Sprint PCS
          Products and Services in the entire Service Area.  This includes
          replacing any existing

                                      -1-
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          long distance service used in the provision of Sprint PCS Products and
          Services in the Service Area.

               Sprint PCS will bill Manager for the services used by Manager.
          Manager will be charged the same price for such long-distance service
          as Sprint PCS is charged by Sprint plus an additional administrative
          fee to cover Sprint PCS' processing costs.

               Manager may not resell the long-distance telephony services
          acquired from Sprint under this Section 3.4.

; and the last three sentences in Section 3.4 are deleted in their entirety.

     (b) Section 3.7 is modified by adding the following language: "(other than
backhaul services relating to national platform and IT application connections,
which Manager must purchase from Sprint if Manager is a Type I or Type II
affiliate as described on Exhibit 2.1.1)" both between (A) "Service Area
Network" and "if Manager decides to use" in the first sentence of the first
paragraph and (B) "for these services" and "and the agreement was not made" in
the first sentence of the second paragraph.

     (c) "Long-distance telephony services used in the provision of Sprint PCS
Products and Services" means services needed to provide long-distance telephony
service to users of the Sprint PCS Network, but not services to connect the
Service Area Network with the national platforms used by Sprint PCS to provide
services to Manager under the agreement and/or the Services Agreement.

     (d) If, after May 1, 2002, Manager delivers to Sprint PCS a copy of a
competitive bid from a long-distance telephony service provider who meets
Sprint's network reliability and voice quality standards in force at the time
Sprint receives the bid proposal (certified by the chief executive officer of
Manager as an accurate and complete description of such bid) to provide long-
distance services to Manager, and such bid is for a period not less than two
years and includes transport charges that are at least 10% less than the
transport charges and administrative fee charged by Sprint, Manager may purchase
long-distance services until the underlying contract resulting from the
certified bid terminates, at which time the language in (a) above governs.

     3.   INTER AREA SERVICE FEE.  Section 9 of Addendum I is deleted in its
entirety and replaced with the following language:

     INTER AREA SERVICE FEE.   Inter area service fees will apply in accordance
with the Management Agreement, except that, until December 31, 2002, a
"CONFIDENTIAL INFORMATION OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND
EXCHANGE COMMISSION" cent per minute inter area service fee under Section 10.1.3
will apply in the following instances:

(a)  Sprint PCS subscribers  traveling to the Beaumont-Port Arthur, TX BTA and
     the Lufkin-Nacogdoches, TX BTA; and

(b)  Manager's subscribers with NPA-NXXs in the Beaumont-Port Arthur, TX and
     Lufkin-Nacogdoches, TX BTAs traveling to the Houston, TX BTA.

                                      -2-
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The current inter area service fee of "CONFIDENTIAL INFORMATION OMITTED AND
FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION"  cents will not
decrease for transactions between Sprint PCS and Manager (e.g., does not apply
to transactions between Manager and Other Managers) until December 31, 2002.

     4.   CONVERSION TO TYPE II AFFILIATE. Manager will complete the conversion
of the Service Area Network from "Type III" (i.e., where Manager designates
Option #3 on Exhibit 2.1.2 to the Services Agreement) to "Type II" (i.e., where
Manager designates Option #2 on Exhibit 2.1.2 to the Services Agreement) no
later than June 30, 2001.  Sprint PCS will use good faith efforts to assist
Manager with its conversion, which assistance will include meeting deadlines
critical to completing conversion by June 30, 2001. If Manager is unable to meet
the June 30, 2001 conversion date because of non-performance by Sprint PCS,
Sprint PCS will extend the conversion date.

     If it is determined, after commercially reasonable efforts by Sprint PCS
and Manager, that the post-pay subscribers supported on Manager's systems can
only be converted to Type II services by June 30, 2001 by changing their phone
numbers (the NPA-NXX-XXXXs assigned to subscribers in the Manager's Service
Area), Sprint PCS will allow Manager to continue to support such subscribers on
Manager's systems after conversion, but the parties agree that they will
continue to use commercially reasonable efforts to convert all post-pay
customers to Type II services as soon as possible. In no event will Sprint PCS
require Manager to terminate the service of such post-pay subscribers.

     Sprint PCS will pay for the actual costs it incurs to input Manager's
customer information into plans then supported by Sprint PCS' billing and other
systems.  Manager will pay for the actual costs it incurs to migrate customer
information from its billing system to Sprint PCS' billing system. Manager is
responsible for establishing and maintaining a Type II Affiliation in a manner
consistent with the way Other Managers establish and maintain Type II
Affiliations in the Sprint PCS Affiliations Program.

     Furthermore, Sprint PCS Products and Services offered by the Manager that
are not supported by Sprint PCS billing and other systems will not be added into
Sprint PCS' billing or other systems without Sprint PCS' approval, at its sole
discretion.  If Sprint PCS approves the addition of a Sprint PCS product or
service offered by the Manager that is not supported by Sprint PCS billing and
other systems at the point in time when the Manager requests addition of such
product and service, Manager will pay all costs associated with the development
and implementation of the modifications to Sprint PCS' billing and other systems
that are required to add such plan, product or service.

     5.   REVISED DESIGNATION OF SELECTED SERVICES.  Exhibit 2.1.2 attached to
this addendum supersedes and replaces in its entirety Exhibit 2.1.2 previously
agreed to.

     6.   BILLING SERVICE FEE. From the date Manager's conversion to a Type II
is complete until the earlier to occur of (i) December 31, 2002 or (ii) the date
on which Sprint PCS no longer uses the billing platform currently in use by it,
Sprint PCS will charge Manager for billing pre-pay customers the lesser of (x)
the same service fee it charges Manager for post-pay customers or (y) the fees
charged to Other Managers for prepaid billing services based on standard
services provided to such Other Managers under the Services Agreement.

                                      -3-
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     7.  CHATPAK. (a) Upon the later to occur of (i) completion of Manager's
Type II conversion or (ii) Sprint PCS offers a prepaid product (the "PREPAID
CHANGE DATE"), Manager will cease to promote and sell all prepaid products and
services that utilize Manager's billing platform, but Manager will continue to
support such prepaid products and services for customers who are on its
Manager's prepaid platform as of the Prepaid Change Date and were acquired on or
before the Prepaid Change Date.

     (b) The terms and provisions in this paragraph 7 govern any conflicting
terms and provisions in paragraph 4.

     8.  RESOLUTION OF COMPLIANCE ISSUES.  Manager will resolve all material
compliance issues by the respective deadlines set forth on Exhibit B to this
Addendum.

     9.  MANAGER ACQUISITIONS.  If Manager acquires control of an Other Manager
with a Type III system configuration or its Operating Assets, Manager will work
with Sprint PCS to convert such acquired system to a Type II configuration
within 6 months of the close of the transaction subject to Sprint PCS'
cooperation and assistance.

                                      -4-
<PAGE>

     IN WITNESS WHEREOF, the parties hereto have caused this Addendum II to be
executed as of the date first above written.

                              SPRINT SPECTRUM L.P.

                              By:
                                 ---------------------------------
                              Thomas E. Mateer,
                              Vice President - Affiliations

                              SPRINTCOM, INC.

                              By:
                                 ---------------------------------
                              Thomas E. Mateer,
                              Vice President - Affiliations

                              SPRINT COMMUNICATIONS
                              COMPANY L.P.

                              By:
                                 ---------------------------------
                                 Name:
                                      ----------------------------
                                 Title:
                                       ---------------------------

                              TEXAS UNWIRED

                              By:
                                 ---------------------------------
                                 Name:
                                      ----------------------------
                                 Title:
                                       ---------------------------

                                      -5-<PAGE>

                                                                   EXHIBIT 10.22
[Cooper Cameron Corporation Letterhead]

July 12, 2000

Mr. Michael C. Jennings
Vice President & Treasurer
Corporate
Houston, Texas

Dear Mike:

     Cooper Cameron Corporation (the "Company") considers the establishment and
maintenance of a sound and vital management to be essential for the protection
and enhancement of the best interests of the Company and its shareholders.  The
Company recognizes that, as is the case with many publicly-held corporations,
the possibility of a "Change of Control" (as defined herein) may arise and that
such possibility, and the uncertainty and questions which it may raise among
management, may result in the departure or distraction of management personnel
to the detriment of the Company and its shareholders.  Accordingly, the board of
directors of the Company (the "Board") has determined that appropriate steps
should be taken to assure the Company of the continuation of your service and to
reinforce and encourage the attention and dedication of members of the Company's
management to their assigned duties without distraction in circumstances arising
from the possibility of a Change of Control of the Company. In particular the
Board believes it important, should the Company or its shareholders receive a
proposal for or notice of transfer of control of the Company, or consider one
itself, that you be able to assess and advise the  Company whether such transfer
would be or is in the best interests of the Company and its shareholders, and to
take such other action regarding such transfer as the Board might determine to
be appropriate without being influenced by the uncertainties of your own
situation.

     In order to induce you to remain in the employ of the Company, this letter
agreement (the "Agreement"), prepared pursuant to authority granted by the
Board, sets forth the compensation and severance benefits which the Company
agrees will be provided to you should your employment with the Company be
terminated in connection with a Change of Control under the circumstances
described below as well as certain other benefits which will be made available
to you should you be employed by the Company on the Effective Date of a Change
of Control.

     Reference is made to Annex I hereto for definitions of certain terms used
in this Agreement, and such definitions are incorporated herein by such
reference with the same effect as if set forth herein.
<PAGE>

Page 2

     1.  Termination in Connection with a Change of Control.

         (a) If there is a termination of your employment with the Company
either by the Company without Cause or  by you for Good Reason during the period
between the Effective Date of a Change of Control and 2 years following the
Change of Control (the "Effective Period"), and if such Effective Date occurs
during the life of this Agreement, you shall be entitled to the following
benefits , whether or not this Agreement has been cancelled prior to the time of
your termination:

         (i)  all benefits conferred upon you by the Severance Package, and

         (ii) in addition, all benefits payable under the provisions either of
the Company's employee and executive Plans in which you are a participant
immediately prior to the Effective Date, or of those plans in existence at the
time of your Termination Date, whichever are more favorable to you, in
accordance with the terms and conditions of such Plans or plans, such benefits
to be paid under such Plans or plans and not under this Agreement.

         (b)  Notwithstanding the above, you shall not be entitled to any such
benefits if your termination results from your death, disability or retirement,
unless your death, disability or retirement occurs (i) during the Effective
Period and (ii), with respect to the benefits conferred by the Severance Package
only, after either it has been decided that you will be terminated without Cause
during the Effective Period, or you have given notice of termination for Good
Reason during the Effective Period.

         (c)  You shall not be required to mitigate the amount of any payment
              provided for in this Agreement by seeking other employment, nor
              shall the amount of any payment provided for in this Agreement be
              reduced by any compensation earned by you as the result of
              employment by another employer after any Termination Date.

     2.  Procedures for Termination.

         (a)  If it is intended that your employment be terminated by you for
Good Reason you shall transmit to the Company written notice setting forth the
particulars upon which you base your determination that Good Reason exists and,
only if the stated basis therefore is capable of being cured, requesting a cure
within 10 days. Failing such a cure, a "final separation" shall then occur, and
if such stated basis is not capable of cure by the Company, "final separation"
shall occur co-extensive with delivery of the notice.  For purposes of this
Agreement, a "Termination Date" shall be deemed to have occurred upon the date
of such "final separation".

         (b) If it is intended that your employment be terminated by the
Company without Cause, a "Termination Date" shall be deemed to have occurred
upon the 30th day following the date of receipt of any notice so stating, or
upon the date specified in the notice, whichever is later.  If it is intended
that your employment be terminated by the Company for Cause, if you contest such
termination pursuant to any proceeding initiated pursuant to Section 7  hereof
within 15 days of receipt of such notice, and it is ultimately determined that
cause did not
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Page 3

exist, then (anything else in the Agreement to the contrary notwithstanding) a
"Termination Date" shall be deemed to have occurred upon the final resolution of
such proceeding .

     3.  LTIP Benefit Acceleration. Immediately upon any Change of Control, all
contingent compensation rights issued to you under the LTIP Plan which are then
outstanding shall become vested, exercisable, distributable and unrestricted
(any contrary provision in the LTIP Plan notwithstanding) whether or not you
continue to be employed by the Company. You shall have the right immediately
upon any written request by you to the Company, to (i) exercise all or any
portion of all your options covered (including, at your sole election, any
associated Tandem SAR) by the LTIP Plan and to have the underlying Shares issued
to you, (ii) have issued to you on a non-forfeitable basis any or all Shares
covered by Restricted Stock Awards held by you under the LTIP Plan, (iii) have
issued to you any or all Performance Shares and/or Performance Units held by you
in the LTIP Plan, (iv) exercise all or any portion of any LTIP Plan Freestanding
SAR held by you, and (v) obtain the full benefit of any other contingent
compensation rights to which you may be entitled under the LTIP Plan, in each
case as though all applicable Performance Targets had been met or achieved at
maximum levels for all Performance Periods (including those extending beyond the
Effective Date) and any and all other LTIP Plan contingencies had been satisfied
in full at the date of the Change of Control and the maximum possible benefits
thereunder had been earned at the date of the Change of Control.

     4.  Conditional Share Purchase Obligation.

         (a) If a Change of Control occurs as a consequence of a tender offer
or exchange offer (the "Tender Offer"), the Company shall, if requested by you,
purchase from you (whether a Termination Date has occurred following the Change
of Control) for cash on any business day selected by you upon not less than ten
days' notice to the Company, which day shall not be less than ten days following
consummation of the Tender Offer nor more than three years after the Effective
Date, up to that number of Shares which shall be equal to the product of (x) the
number of Shares acquired by you upon exercise or distribution of any benefit
under the Bonus Plan or LTIP Plan prior to consummation of the Tender Offer,
multiplied by (y) the decimal equivalent of (I) the number of Shares accepted
for purchase or exchange in the Tender Offer, divided by (II) the number of
Shares timely and validly tendered pursuant to the Tender Offer. In the event
the above obligation to purchase Shares occurs by reason of a cash tender offer
or a combination cash tender offer and exchange offer, the cash price per share
to be paid to you hereunder shall be equal to the highest price paid in cash
pursuant to the Tender Offer. In the event such obligation occurs by reason of
an exchange offer, the cash price per share to be paid to you hereunder shall be
equal to the closing price, if traded on a stock exchange, or the average bid
and asked prices, if traded in the over-the-counter market, of the security of
the person so exchanged for the Shares (the "Exchange Security") on the first
day on which the Exchange Security could have been sold by you on such exchange
or in the over-the-counter market, as the case may be, in a regular broker's
transaction had your Shares been tendered and accepted, multiplied by the number
of Exchange Securities (or fraction thereof) issued in the Tender Offer for each
Company Share; and
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Page 4

         (b) If a Change of Control occurs pursuant to a Tender Offer and (i) a
merger, consolidation, reorganization, sale, spin-off, or purchase of assets
under which all remaining outstanding Shares will be converted into or become
exchangeable for cash, or for securities ("Merger Security") issued or to be
issued by the Person who made the Tender Offer (or a subsidiary or affiliate of
such Person), is thereafter proposed to the Company or its shareholders, and
(ii) such merger, consolidation, reorganization or purchase of assets occurs
less than three years after the Effective Date, and (iii) the amounts of cash
into which each Share would be converted if the transaction is effected wholly
for cash, or the Merger Security Value (as defined below) if such transaction is
effected wholly for Merger Securities, or the sum of the cash and the Merger
Security Value if the Transaction is effected partly for cash and partly for
Merger Securities, as the case may be, is less than 95% of the per share price
that would have been paid by the Company for such portion of your Shares had you
exercised your option to require the Company to purchase such Shares under
Section 4(a) above, the Company shall pay you (whether or not a Termination Date
has occurred following a Change of Control), an amount in cash equal to the
difference between the aggregate price you would have received from the number
of Shares the Company would have been required to purchase from you had you
exercised such option under Section 4(a) and the amount of cash and/or the
Merger Security Value received for the same number of Shares in such merger,
consolidation, reorganization or purchase of assets. Such cash payment shall be
made to you on a business day selected by you upon no less than ten-calendar
days' notice to the Company or its Successor (as hereinafter defined). For
purposes of this Section 4(b), "Merger Security Value" shall mean the closing
price, if traded on a stock exchange, or the average bid and asked prices if
traded in the over-the-counter market, of the Merger Security on the first day
on which the Merger Security could have been sold by you on such exchange or in
the over-the-counter market, as the case may be, in a regular broker's
transaction, multiplied by the number of Merger Securities (or fraction thereof)
for which each Share was exchangeable or into which each Share was convertible.
If no public market develops for the Merger Security within 30 days from the
date of its issue, however, "Merger Security Value" shall mean the fair market
value of such Merger Security (on a per unit basis in the written opinion of a
nationally recognized investment banking firm acceptable to you) on the
effective date of the merger, consolidation, reorganization or purchase of
assets, as the case may be, multiplied by the number of Merger Securities (or
fraction thereof) for which each Share was exchangeable or into which each Share
was convertible.

     5.  Certain Rights with Respect to Options.

         (a) In addition to any other rights or privileges held by a holder
with respect to an option covered by the LTIP Plan ("LTIP Option") (including
the provisions of Section 3 and Section 4), upon a Change of Control of the
Company, the holder shall have the right to exchange such option for a new
option ("New Option"), that shall be issued according to the following:

         (i) the New Option shall be immediately exercisable;

         (ii) the New Option shall have a term equal to the remaining term of
the LTIP Option it replaces (and shall be exercisable through such term);
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Page 5

         (iii)  the New Option will give the holder the right to acquire shares
of the publicly traded common equity of the Company or any successor or direct
or indirect parent of either ("Replacement Common Stock") (in the event of two
or more classes of common equity, the common equity used shall be determined by
the Compensation Committee of the Board of Directors of the Company existing
prior to a Change of Control);

         (iv) the exercise price used for the New Option ("New Exercise Price")
for acquiring a share of Replacement Common Stock shall be determined at the
time of the Change of Control by taking (x) the higher of (1) the aggregate
value (as of the date of the Change of Control) equal to the merger or
acquisition consideration paid or payable in the Change of Control, on a per
share basis, or (2) the highest price paid for a share of Company common stock
over the New York Stock Exchange (or other primary exchange) during the 12
months prior to the Change of Control, and (y) dividing such amount into the per
share exercise price of the LTIP Option; with the result multiplied by the
Replacement Common Stock closing price on its principal stock exchange on the
day of the Change in  Control, or if traded in the over-the-counter market and
not on an exchange, the last bid price in such market;

         (v) the number of shares of Replacement Common Stock subject to the
New Option shall be the number necessary, using the New Exercise Price, to
provide an aggregate value (as of the date of the Change of Control) equal to
the higher of (x) the merger or acquisition consideration paid or payable in the
Change of Control on a per share basis, or (y) the highest price paid for a
share of Company common stock over the New York Stock Exchange (or other primary
exchange) during the 12 months prior to the Change of Control;

         (vi) if there is no publicly traded common equity of the Company,
or any successor or any direct or indirect parent of either, then the New Option
shall be with respect to shares of the direct or indirect parent of the Company,
and if no such parent then the Company, and if the Company no longer exists,
then the successor to the Company;

         (b) In addition to any other rights or privileges held by a holder
with respect to an option covered by the LTIP Plan (including the provisions of
Section 3 and Section 4), if a Change of Control occurs, you shall have the
right, but not the obligation, to tender, within 30 days of such a Change of
Control, any option to the Company (or any successor to the Company) and receive
in exchange therefor a lump sum cash amount equal to the Black-Scholes value of
the option, without discount for risk of forfeiture and nontransferability
determined by using the highest Black-Scholes valuation during the one-year
period prior to the Change of Control.  Any Black-Scholes valuation shall be
performed on a basis consistent with the methodology set forth on Exhibit A to
this Agreement.

     6.  Excise Tax.

         (a) Any other provision of this Agreement to the contrary
notwithstanding, if the present value (as defined herein) of the total amount of
payments and benefits to be paid or provided to you under this Agreement which
are considered to be "parachute payments" within the meaning of Section 280G(b)
of the Internal Revenue Code of 1986, as amended (the "Code"), when added to any
other such "parachute payments" received by you from the
<PAGE>

Page 6

Company upon or after a Change of Control, whether or not under this Agreement,
is in excess of the amount you can receive without causing you to be subject to
an excise tax with respect to such amount on account of Code Section 4999, the
Company shall pay to you an additional amount (hereinafter referred to as the
"Excise Tax Premium"). The Excise Tax Premium shall be equal to the excise tax
determined under Code Sections 280G and 4999 attributable to the total amount of
payments and benefits to be paid or provided to you under this Agreement and any
other "parachute payments" received by you upon or after a Change of Control.
The Excise Tax Premium shall also include any amount attributable to excise tax
on the Excise Tax Premium. The Company shall also pay to you an additional
amount (the "Additional Amount") such that the net amount received by you, after
paying any applicable Excise Tax Premium and any federal or state income, excise
or other tax on such additional amount, shall be equal to the amount that you
would have received if such Excise Tax Premium were not applicable. You shall be
deemed to pay income taxes on the date of termination of your employment at the
highest marginal rate of income taxation in effect in your taxing jurisdiction.
The Additional Amount shall include any amount attributable to income, excise or
other tax on the Additional Amount.

         (b) Not later than 30 days following your Termination Date as provided
herein, the independent public accountants acting as auditors for the Company on
the date of the Change of Control (or another accounting firm designated by you)
shall determine whether the sum of the present value of any "parachute payments"
payable under this Agreement and the present value of any other "parachute
payments" received by you from the Company upon or after a Change of Control is
in excess of the amount you can receive without causing you to be subject to an
excise tax with respect to such amount on account of Code Section 4999, and
shall determine the amount of any Excise Tax Premium and Additional Amount
payable to you.  The Excise Tax Premium and Additional Amount shall be paid to
you as soon as practicable but in no event later than 35 days following your
Termination Date, and shall be net of any amounts required to be withheld for
taxes.

         (c) For purposes of this Section 6C, "present value" means the value
determined in accordance with the principles of Section 1274 (b) (2) of the Code
under the rules provided in Treasury Regulations under Section 280G of the Code.

          (d) References to Code Section 280G herein are specific references to
Section 280G as added to the Code by the Tax Reform Act of 1984 and as amended
by the Tax Reform Act of 1986.  To the extent Code Section 280G is again amended
prior to the termination of this Agreement, or is replaced by a successor
statute, the provisions of this Section 6 shall be deemed modified without
further action of the parties in a manner consistent with such amendments or
successor statutes, as the case may be.  In the event that Code Section 280G or
any successor statute is repealed, this Section 6 shall cease to be effective on
the effective date of such repeal.  The parties recognize that Treasury
Regulations under Code Sections 280G and 4999 may affect the amount that may be
paid hereunder and agree that, upon the issuance of any such regulations, this
Agreement may be modified as in good faith may be deemed necessary in light of
the provisions of such regulations to achieve the purposes hereof, and that
consent to such modifications shall not be unreasonably withheld.
<PAGE>

Page 7

     7.  Dispute Resolution.

         (a) This Agreement shall be governed in all respects, including as to
validity, interpretation and effect, by the internal laws of the State of Texas
without regard to choice of law principles.

         (b) It is irrevocably agreed that if any dispute arises between us
under this Agreement: (i) exclusive jurisdiction shall be in the lowest Texas
state court of general jurisdiction sitting in Harris County, Texas, (ii) we are
each at the time present in Texas for the purpose of conferring personal
jurisdiction; (iii) any such action may be brought in such court, and any
objection that the Company or you may now or hereafter have to the venue of such
action or proceeding in any such court or that such action or proceeding was
brought in an inconvenient court is waived, and we each agree not to plead or
claim the same, (iv) service of process in any such proceeding or action may be
effected by mailing a copy thereof by registered or certified mail, return
receipt requested (or any substantially similar form of mail), postage prepaid,
to such party at the address provided in Section 11 hereof, and (v) prior to any
trial on the merits, we will submit to court supervised, non-binding mediation.

         (c) Notwithstanding any contrary provision of Texas law, the Company
shall have the burden of proof with respect to any of the following: (i) that
Cause existed at the time any notice was given to you under Section 2 (ii) that
Good Reason did not exist at the time notice was given to the Company under
Section 2; and (iii) that a Change of Control has not occurred.

     8.  Successors; Binding Agreement.

         (a) In the event any Successor (as defined below) does not assume this
Agreement by operation of law the Company will seek to have any Successor, by
agreement in form and substance satisfactory to you, expressly assume and agree
to perform this Agreement in the same manner and to the same extent that the
Company would be required to perform it. If there has been a Change of Control
prior to, or a Change of Control will result from, any such succession, then
failure of the Company to obtain at your request such agreement prior to or upon
the effectiveness of any such succession (unless assumption occurs as a matter
of law) shall constitute Good Reason for termination by you of your employment
and, upon delivery of a notice of termination by you to the Company, you shall
be entitled to the benefits provided for herein.  "Successor" shall mean any
Person that succeeds to, or has the ability to control, the Company's business
as a whole, directly by merger, consolidation, spin-off or similar transaction,
or indirectly by purchase of the Company's Voting Securities or acquisition of
all or substantially all of the assets of the Company.

         (b) This Agreement shall inure to the benefit of and be enforceable by
your personal and legal representatives, executors, administrators, successors,
heirs, distributees, devisees and legatees.
<PAGE>

Page 8

     9.  Fees and Expenses. The Company shall pay all legal fees and
expenses incurred by you as a result of (i) your termination following a Change
of Control (including all such fees and expenses, if any, incurred in contesting
or disputing any such termination) as well as (ii) your seeking to interpret,
obtain, assert or enforce any right or benefit conferred upon you by this
Agreement.

     10. Notices.  Any and all notices required or permitted to be given
hereunder shall be in writing and shall be deemed to have been given when
delivered in person to the persons specified below or deposited in the United
States mail, certified or registered mail, postage prepaid and addressed as
follows:

          If to the Company:  Cooper Cameron Corporation
                              515 Post Oak Boulevard, Suite 1200
                              Houston, Texas 77027
                              Attention: Chief Executive Officer

          If to you:          Michael C. Jennings
                              4028 Riley
                              Houston, Texas 77005

     Either party may change, by the giving of notice in accordance with
this Section 10, the address to which notices are thereafter to be sent.

     11. Validity.  The invalidity or unenforceability of any provision of
this Agreement shall not affect the validity or enforceability of any other
provision of this Agreement, which shall remain in full force and effect.

     12. Survival.  All obligations undertaken and benefits conferred
pursuant to this Agreement, shall survive any termination of your employment and
continue  until performed in full.

     13. Miscellaneous.  No provision of this Agreement may be modified,
waived or discharged unless such modification, waiver or discharge is agreed to
in writing signed by you and the Company. No waiver by either party hereto at
any time of any breach by the other party hereto of, or of compliance with, any
condition or provision of this Agreement to be performed by such other party
shall be deemed a waiver of similar or dissimilar provisions or conditions at
the same or at any prior or subsequent time. No agreements or representations,
oral or otherwise, express or implied, with respect to the subject matter hereof
have been made by either party which are not expressly set forth in this
Agreement. The internal laws of the State of Texas shall govern the validity,
interpretation, construction and performance of this Agreement.

     14. Duplicate Originals.  This Agreement has been executed in
duplicate originals, with one to be held by each of the parties hereto.
<PAGE>

Page 9

     If this letter correctly sets forth our understanding with respect to
the subject matter hereof, please sign and return one copy of this letter to the
Company.

                                       Sincerely,

                                       COOPER CAMERON CORPORATION

                                          /s/ Sheldon R. Erikson
                                       BY:_______________________
                                          Sheldon R. Erikson
                                          Chairman, President and
                                          Chief Executive Officer

Agreed to as of the 14th
day of July, 2000

/s/ Michael C. Jennings
-----------------------
Michael C. Jennings
<PAGE>

                    ANNEX I TO AGREEMENT DATED JULY 12, 2000
                                    BETWEEN
                           COOPER CAMERON CORPORATION
                                      AND
                              MICHAEL C. JENNINGS

                                 Definition of
                                 Certain Terms

          "BONUS PLAN" means for each year, the Company's Management Incentive
Compensation Plan or any other Plan adopted by the Board which provides for the
payment of additional compensation on an annual basis to senior executive
officers contingent upon the Company's results of operations for that specific
year, in either case as such Plan shall be amended or modified to, but not on or
after, any Effective Date.

          "BYLAWS" means the bylaws of the Company as in effect at the date
hereof and as the same shall be amended or otherwise modified to, but not on or
after, any Effective Date.

          "CAUSE" means (i) your conviction by a court of competent
jurisdiction, from which conviction no further appeal can be taken, of a felony-
grade crime involving moral turpitude, or (ii) your willful failure to perform
substantially your duties with the Company (other than a failure due to physical
or mental illness) which is materially and demonstrably injurious to the
Company.   No act or failure to act on your part shall be considered "willful"
unless done, or omitted to be done, by you in bad faith and without reasonable
belief that your action or omission was in, or not opposed to, the best
interests of the Company.

          "CHANGE OF CONTROL" means the earliest date at which:

          (i) any Person is or becomes the "beneficial owner" (as defined in
Rule 13d-3 under the Exchange Act), directly or indirectly, of securities of the
Company representing 20% or more of the combined voting power of the Company's
outstanding Voting Securities, other than through the purchase of Voting
Securities directly from the Company through a private placement; or

          (ii) individuals who constitute the Board on the date hereof (the
"Incumbent Board") cease for any reason to constitute at least a majority
thereof, provided that any person becoming a director subsequent to the date
hereof whose election, or nomination for election by the Company's shareholders,
was approved by a vote of at least two-thirds of the directors comprising the
Incumbent Board shall from and after such election be deemed to be a member of
the Incumbent Board; or

          (iii)  the Company is merged or consolidated with another corporation
or entity and as a result of such merger or consolidation less than 60% of the
outstanding Voting Securities of the surviving or resulting corporation or
entity shall then be owned by the former stockholders of the Company; or

                                      A-1
<PAGE>

          (iv) a tender offer or exchange offer is made and consummated by a
Person other than the Company for the ownership of 20% or more of the Voting
Securities of the Company then outstanding; or

          (v) all or substantially all of the assets of the Company are sold or
transferred to a Person as to which (A) the Incumbent Board does not have
authority (whether by law or contract) to directly control the use or further
disposition of such assets and (B) the financial results of the Company and such
Person are not consolidated for financial reporting purposes.

          Anything else in this definition to the contrary notwithstanding, no
Change of Control shall be deemed to have occurred by virtue of any transaction
which results in you, or a group of Persons which includes you, acquiring more
than 20% of either the combined voting power of the Company's outstanding Voting
Securities or the Voting Securities of any other corporation or entity which
acquires all or substantially all of the assets of the Company, whether by way
of merger, consolidation, sale of such assets or otherwise.

          "DEFINED BENEFIT PLAN" means the Company's Retirement Plan and
Supplemental Excess Defined Benefit Plan, as the same shall be amended or
modified to, but not on or after, any Effective Date.

          "DEFINED CONTRIBUTION PLAN" means the Company's Retirement Savings
Plan and Supplemental Excess Defined Contribution Plan, as the same shall be
amended or modified to, but not on or after, any Effective Date.

          "DISABILITY" means your continuing full-time absence from your duties
with the Company for 180 DAYS OR LONGER AS A RESULT OF PHYSICAL OR MENTAL
INCAPACITY.

          "EFFECTIVE DATE" means the earliest date upon which (i) any of the
events set forth under the definition of Change of Control shall have occurred,
(ii) the receipt by the Company of a Schedule 13D stating the intention of any
Person to take actions which, if accomplished, would constitute a Change of
Control, (iii) the public announcement by any Person of its intention to take
any such action, in each case without regard for any contingency or condition
which has not been satisfied on such date, (iv) the agreement by the Company to
enter into a transaction which, if consummated, would result in a Change of
Control, or (v) consideration by the Board of a transaction which, if
consummated, would result in a Change of Control.

          If, however, an Effective Date occurs but the proposed transaction to
which it relates ceases to be actively considered or it is not consummated
within 12 months of such Effective Date, the Effective Period will be deemed not
to have commenced for purposes of this Agreement.  If an Effective Date occurs
with respect to a proposed transaction which ceases to be actively considered
but for which active consideration is revived, the Effective Date with respect
to the Change of Control that ultimately occurs shall be that date when
consideration was revived and carried through to consummation.

                                      A-2
<PAGE>

          "EXCHANGE ACT" means the Securities Exchange Act of 1934, as amended,
and the rules and regulations promulgated thereunder.

          "GOOD REASON" means any of the following:

                (i) except as a result of your death or Retirement, or following
          the receipt by you of a Notice of Termination for Cause or due to
          Disability, a change in your status, title(s) or position(s) with the
          Company, including as an officer of the Company, which, in your
          reasonable judgment, does not represent a promotion, with commensurate
          adjustment of compensation, from your status, title(s) and position(s)
          immediately prior to the Effective Date; or the assignment to you of
          any duties or responsibilities which, in your reasonable judgment, are
          inconsistent with such status, title(s) or position(s); or the
          withdrawal from you of any duties or responsibilities which in your
          reasonable opinion are consistent with such status, title(s) or
          position(s); or any removal of you from or any failure to reappoint or
          reelect you to such position(s); or

                (ii) a reduction by the Company in your base salary in effect
          immediately prior to the Effective Date: or

                (iii)  the failure by the Company to continue in effect any Plan
          in which you were participating immediately prior to the Effective
          Date other than as a result of the normal expiration or amendment of
          any such Plan in accordance with its terms, or the taking of any
          action, or the failure to act, by the Company which would adversely
          affect your continued participation in any such Plan on at least as
          favorable a basis to you as is the case immediately prior to the
          Effective Date or which would materially reduce your benefits under
          any of such Plans or deprive you of any material benefit enjoyed by
          you immediately prior to the Effective Date, except as proposed by you
          to the Company; or

                (iv) the relocation of the principal place of your employment to
          a location 25 miles further from your principal residence without your
          express written consent; or

                (v) the failure by the Company upon a Change of Control to
          obtain the assumption of this Agreement by any Successor (other than
          by operation of law); or

                (vi) any refusal by the Company to continue to allow you to
          attend to matters or engage in activities not directly related to the
          business of the Company which you attended to or were engaged in
          immediately prior to the Effective Date and which do not otherwise
          violate your obligations hereunder; or

                (vii) any continuing material default by the Company in the
          performance of its obligations under this Agreement, whether before or
          after a Change of Control.

          "LTIP PLAN" means the Company's Long-Term Incentive Plan adopted as it
may be amended, modified, or replaced, up to, but not on or after, an Effective
Date.

                                      A-3
<PAGE>

          "OTHER PLANS" means any thrift; bonus or incentive; stock option or
stock accumulation; pension; medical, disability, accident or life insurance
plan, program or policy of the Company which is intended to benefit employees of
the Company that are similarly situated to you (other than the Bonus Plan,
Defined Benefit Plan, Defined Contribution Plan, LTIP Plan or Purchase Plan).

          "PERSON" means any individual, corporation, partnership, group,
association or other "person," as such term is used in Sections 13(d) and 14(d)
of the Exchange Act, other than the Company or any Plans sponsored by the
Company.

          "PERQUISITES" means individual perquisites benefits received by you
immediately prior to the Effective Date, including, but not limited to, club
membership dues.

          "PLANS" means the Bonus Plan, Defined Benefit Plan, Defined
Contribution Plan, LTIP Plan, Purchase Plan, Compensation Deferral Plan and
Other Plans.

          "PURCHASE PLAN" means the Company's Employee Stock Purchase Plan
adopted as the same shall be amended or modified to, but not on or after, any
Effective Date.

          "RETIREMENT" means termination of your employment on the "normal
retirement date" as set forth in the Defined Benefit Plan.

          "SEVERANCE PACKAGE" means your right to receive, and the Company's
obligation to pay and/or perform on, the following:

                (a) on or within ten days following an applicable Termination
          Date, the Company shall pay to you a lump sum, cash amount equal to
          the sum of (i) three times the highest annual rate of Base Salary in
          effect during the current year or any of the three years preceding the
          Termination Date and (ii) three times the greater of (A) the maximum
          award you would have been eligible to receive under the Bonus Plan in
          respect of the current year, regardless of any limitations otherwise
          applicable to the Bonus Plan (i.e., the failure to have completed any
          vesting period or the current measurement period, or the failure to
          achieve any performance goal applicable to all or any portion of the
          measurement period) or (B) the largest award earned (whether or not
          paid) under the Bonus Plan in respect of any of the three years
          preceding the Termination Date, or (C) 60% of your Base Pay at the
          applicable Termination Date, and (iii) three times the Black-Scholes
          value at the time of grant of the most valuable one-year option grant
          (excluding any option you received at your election in lieu of salary
          or bonus award) you had received from the Company during the five
          years prior to your Termination Date with any such Black-Scholes
          valuation performed on a basis consistent with the methodology set
          forth on Exhibit A to the Agreement; and

                (b) in addition to your entitlement to the vested portion of
          your interest in the Defined Contribution Plan in accordance with the
          terms of that plan, the Company shall pay to you, on or within ten
          days following the applicable Termination Date, an amount in cash
          equal to the unvested portion of the Company's contributions to your
          account,

                                      A-4
<PAGE>

          which unvested portion shall be valued on the same basis as the Shares
          contributed by the Company in respect of the unvested portion were
          valued at the date(s) of contribution; and

                (c) in addition to any vested retirement benefits to which you
          are entitled on the Termination Date under the Defined Benefit Plan,
          the Company shall pay to you, on or within ten days following an
          applicable Termination Date, an amount in cash equal to the product of
          (i) a number equal to your years of life expectancy beyond age 65
          determined in accordance with the actuarial assumptions utilized under
          the Defined Benefit Plan immediately prior to the Termination Date,
          times (ii) an amount equal to the difference between (A) the annual
          benefit to which you would have been entitled under the "single life
          annuity" method of distribution under the Defined Benefit Plan if you
          were fully vested thereunder (without regard to (I) whether you shall
          actually have completed the period of Vesting Service required to
          qualify for benefits under the Defined Benefit Plan, (II) any
          limitation on the amount used in the calculation of the annual benefit
          thereunder, (III) any offset thereunder for severance allowances
          payable thereunder, or (IV) any amendment to the Defined Benefit Plan
          made in connection with a Change of Control and on or prior to the
          Termination Date, which amendment adversely affects in any manner the
          computation of retirement benefits under such plan) and had
          accumulated an additional three years of Vesting Service thereunder,
          and (B) the annual benefit, if any, to which you would be entitled
          under the single life annuity method of distribution under the Defined
          Benefit Plan as of the Termination Date; and

                (d) unless you give notice to the Company pursuant to the next
          sentence within 90 days following an applicable Termination Date, the
          Company shall maintain in full force and effect, at its sole expense
          for the continued benefit of you and your dependents during the period
          from the Termination Date through the earlier (i) three years from the
          Termination Date or (ii) the commencement date of equivalent benefits
          from a new employer, all insured and self-insured employee welfare
          benefit Plans and Perquisites in which you were entitled to
          participate immediately prior to the Termination Date. Alternatively,
          if you notify the Company that you so elect, the Company shall pay you
          within five days of such notification an amount in cash equal to three
          times the average annual cost incurred by the Company during the
          preceding three calendar years as a result of your participation in
          such welfare benefit Plans (or such fewer whole calendar years as you
          have so participated). If your participation in any such welfare
          benefit Plan is barred, the Company, at its sole cost and expense,
          shall arrange to have issued for the benefit of you and your
          dependents individual policies of insurance providing benefits
          substantially similar (on an after-tax basis) to those which you are
          entitled to receive under such Plans. You shall not be required to pay
          any premiums or other charges for such policies. At the end of three
          years after the Termination Date, the Company, provided you have not
          previously received or are not then receiving equivalent benefits from
          a new employer, shall arrange, at its sole cost and expense, to enable
          you to programs upon the same terms as employees of the Company may
          apply for such conversions.

                                      A-5
<PAGE>

          Anything else in this Agreement to the contrary notwithstanding, if
(i) you are terminated in connection with a merger, consolidation or a tender
offer or an exchange offer, (ii) you are entitled to the benefits provided for
under Section 1 hereof, and (iii) your Termination Date precedes or occurs on
the date of the closing thereof, then unless otherwise agreed to by both parties
in writing, all amounts to which you are or shall become entitled to under this
Agreement, which are calculable as of the closing date, shall be accelerated to,
and become immediately due and payable contemporaneously with such closing.

          "SHARES" means shares of Common Stock, $.01 par value, of the Company
at the date of this Agreement, as the same shall be subsequently amended,
modified or changed. The term "market value," when used with respect to a Share
means the closing price therefor on the New York Stock Exchange or if not listed
thereon, on such other exchange as shall at the tune constitute the principal
exchange for trading in Shares.

          "VOTING SECURITIES" means, with respect to any corporation or business
enterprise, those securities, which under ordinary circumstances are entitled to
vote for the election of directors or others charged with comparable duties
under applicable law.

                                      A-6

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