Document:

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                                                                     EXHIBIT 4.6

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                           NOBLE DRILLING CORPORATION,
                                   as Issuer,

                                       and

                        NOBLE HOLDING (U.S.) CORPORATION

                                       and

                               NOBLE CORPORATION,
                                 as Guarantors,

                                       and

                              JPMORGAN CHASE BANK,
                                   as Trustee

                                   ----------

                          SECOND SUPPLEMENTAL INDENTURE

                           Dated as of April 30, 2002

                                       to

                                    INDENTURE

                      Dated as of March 1, 1999, as amended

                                   ----------

                           6.95% SENIOR NOTES DUE 2009
                           7.50% SENIOR NOTES DUE 2019

================================================================================

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         SECOND SUPPLEMENTAL INDENTURE dated as of April 30, 2002 between NOBLE
DRILLING CORPORATION, a corporation duly organized and existing under the laws
of the State of Delaware (the "Company"), NOBLE HOLDING (U.S.) CORPORATION, a
corporation duly organized and existing under the laws of the State of Delaware
("Holding"), and NOBLE CORPORATION, a Cayman Islands exempted company limited by
shares ("Noble-Cayman") (collectively with Holding, the "Guarantors"), and
JPMORGAN CHASE BANK, a New York corporation, successor by merger to Chase Bank
of Texas, N.A., as trustee (the "Trustee").

                                    RECITALS:

         WHEREAS, the Company has executed and delivered to the Trustee an
Indenture dated as of March 1, 1999 (the "Original Indenture", as supplemented
by the First Supplemental Indenture thereto dated as of March 16, 1999, the
"Supplemented Indenture", and as further supplemented by this Second
Supplemental Indenture the "Indenture"), providing for the issuance by the
Company from time to time of its unsecured senior debt securities (the
"Securities"), issuable in one or more series;

         WHEREAS, the Company has issued, and the Trustee has authenticated and
delivered, two series of Securities designated "6.95% Senior Notes due 2009" and
"7.50% Senior Notes due 2019" (collectively, the "Notes");

         WHEREAS, the Company is the obligor with respect to the Notes;

         WHEREAS, the Guarantors desire to provide for the unconditional and
irrevocable guarantee by the Guarantors of the due and punctual payment of the
principal of, premium, if any, interest on, and all other amounts due under, the
Notes;

         WHEREAS, Section 901(a) of the Indenture provides, that, without the
consent of any Holders, the Company, when authorized by a Board Resolution, and
the Trustee at any time and from time to time may enter into one or more
indentures supplemental to the Indenture to make any other provisions with
respect to matters or questions arising under the Indenture, provided such other
provisions as may be made shall not adversely affect the interests of the
Holders of Securities of any series in any material respect;

         WHEREAS, the Company, pursuant to the foregoing authority, proposes to
amend and supplement the Supplemented Indenture in certain respects to provide
for the Guarantee (as defined herein); and

         WHEREAS, all things necessary to make this Second Supplemental
Indenture a valid and legally binding supplemental indenture to the Supplemented
Indenture in accordance with the terms thereof have been done and the execution
and delivery of this Second Supplemental Indenture has been duly authorized in
all respects;

<PAGE>

         NOW, THEREFORE, for consideration, the adequacy and sufficiency of
which is hereby acknowledged by the parties hereto, each party agrees as
follows, for the benefit of the other parties and for the equal and
proportionate benefit of all Holders of the Notes, as follows:

                                   SECTION 1.

                                  THE GUARANTEE

         Section 1.1 The Guarantee. Each Guarantor hereby jointly and severally
and unconditionally guarantees to the Holders from time to time of the Notes (a)
the full and prompt payment of the principal of and any premium on any Note when
and as the same shall become due, whether at the Stated Maturity thereof, by
acceleration, redemption or otherwise, and (b) the full and prompt payment of
any interest on and any Additional Amounts with respect to any Note when and as
the same shall become due, subject in each case to any applicable grace period
or notice requirement or both (the "Guarantee"). Each Guarantor also hereby
unconditionally guarantees to the Trustee the full and prompt payment of all
amounts due it from the Company under the Indenture. The Guarantee hereunder
constitutes a guarantee of payment and not of collection.

         The obligations of each of the Guarantors hereunder with respect to a
series of Notes shall be absolute and unconditional and shall remain in full
force and effect until the entire principal of, premium (if any) and interest on
and any Additional Amounts with respect to the Notes of such series shall have
been paid or provided for in accordance with the provisions of such series and
of the Indenture, irrespective of the validity, regularity or enforceability of
any Note of such series or the Indenture, any change or amendment thereto, the
absence of any action to enforce the same, any waiver or consent by the Trustee
or the Holder of any Note of such series with respect to any provision of such
Note or the Indenture, the recovery of any judgment against the Company or any
action to enforce the same, or any other circumstances that may otherwise
constitute a legal or equitable discharge or defense of a Guarantor. Each
Guarantor hereby waives presentment or demand of payment or notice to such
Guarantor with respect to the Notes and the obligations evidenced thereby or
hereby. Each Guarantor further waives any right of set-off or counterclaim it
may have against any Holder of a Note arising from any other obligations any
such Holder may have to the Company or any Guarantor.

         The obligations of each Guarantor to make any payment hereunder may be
satisfied by causing the Company to make such payment.

         Section 1.2 Subrogation. Each Guarantor shall be subrogated to all
rights against the Company of any Holder of Notes of a series in respect of any
amounts paid by such Guarantor pursuant to the provisions of the Guarantee;
provided, however, that each Guarantor shall be entitled to enforce, or to
receive any payments arising out of or based upon, such right of subrogation
only after the principal of, premium (if any) and interest on and any Additional
Amounts with respect to all Notes of such series and all amounts owing to the
Trustee have been paid in full.

                                       2
<PAGE>

         Section 1.3 Guarantee for Benefit of Holders. The Guarantee contained
in this Second Supplemental Indenture is entered into by each Guarantor for the
benefit of the Trustee and the Holders from time to time of the Notes. Such
provisions shall not be deemed to create any right in, or to be in whole or in
part for the benefit of, any Person other than, the Trustee, each Guarantor, the
Holders from time to time of the Notes and their permitted successors and
assigns.

         Section 1.4 No Recourse Against Others. A director, officer, employee,
stockholder, partner or other owner of a Guarantor, as such, shall not have any
liability for any obligations of such Guarantor under the Guarantee or the
Indenture or for any claim based on, in respect of or by reason of such
obligations or their creation.

                                   SECTION 2.

                                  MISCELLANEOUS

         Section 2.1 SEC Reports; Financial Statements. Each Guarantor shall
file with the Trustee, within 15 days after it files the same with the United
States Securities and Exchange Commission (the "SEC"), copies of the annual
reports and the information, documents and other reports (or copies of such
portions of any of the foregoing as the SEC may by rules and regulations
prescribe) that such Guarantor is required to file with the SEC pursuant to
Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, and any
successor statute. Each Guarantor shall also comply with the provisions of
Section 314(a) of the Trust Indenture Act. Delivery of such reports, information
and documents to the Trustee is for informational purposes only and the
Trustee's receipt thereof shall not constitute constructive notice of any
information contained therein or determinable from information contained
therein, including the Company's compliance with any of its covenants under the
Indenture (as to which the Trustee is entitled to rely exclusively on Officers'
Certificates).

         Section 2.2 Trust Indenture Act Controls. If any provision of this
Second Supplemental Indenture limits, qualifies or conflicts with any provision
of the Trust Indenture Act that is required under such Act to be part of and
govern the Indenture, the latter provision shall control. If any provision
hereof modifies or excludes any provision of the Trust Indenture Act that may be
so modified or excluded, the latter provision shall be deemed to apply to this
Second Supplemental Indenture, as so modified or excluded, as the case may be.

         Section 2.3 Notices. Any notice or communication provided for herein
shall be duly given if in writing and delivered in person or mailed by mail
(registered, return receipt requested, first-class postage prepaid), facsimile
or overnight air courier guaranteeing next day delivery, as follows:

                                       3
<PAGE>

                  (a)      If to the Company:

                           Noble Drilling Corporation
                           13135 South Dairy Ashford, Suite 800
                           Sugar Land, Texas 77478
                           Attn: President
                           Telephone: (281) 276-6100
                           Facsimile: (281) 491-2092

                  (b)      If to the Trustee, to the address set forth in the
                           Original Indenture;

                  (b)      If to a Guarantor:

                           Noble Holding (U.S.) Corporation
                           13135 South Dairy Ashford, Suite 800
                           Sugar Land, Texas 77478
                           Attn: President
                           Telephone: (281) 276-6100
                           Facsimile: (281) 491-2092

                           Noble Corporation
                           13135 South Dairy Ashford, Suite 800
                           Sugar Land, Texas 77478
                           Attn: President
                           Telephone: (281) 276-6100
                           Facsimile: (281) 491-2092

                  The Company, the Guarantors or the Trustee by notice to the
others may designate additional or different addresses for subsequent notices or
communications.

                  All such notices and communications shall be in writing and
shall be deemed to have been duly given: at the time delivered by hand, if
personally delivered; 10 Business Days after being deposited in the mail,
postage prepaid, if mailed; when receipt acknowledged, if by facsimile; and the
next Business Day after timely delivery to the courier, if sent by overnight air
courier guaranteeing next day delivery. If, by reason of the suspension of
regular mail service or by reason of any other cause, it shall be impracticable
to give such notice or communication by mail, then such notice or communication
as shall be made with the approval of the Trustee shall constitute a sufficient
notification or communication for every purpose hereunder.

         Section 2.4 Date and Time of Effectiveness. This Second Supplemental
Indenture shall become a legally effective and binding instrument at and as of
the date hereof.

         Section 2.5 Supplemental Indenture Incorporated into Indenture. The
terms and conditions of this Second Supplemental Indenture shall be deemed to be
part of the Indenture for all purposes relating to the Notes. All amendments to
the Indenture made hereby shall have effect only with respect to the Notes. The
Supplemented Indenture is hereby incorporated by

                                       4
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reference herein and, as further supplemented by this Second Supplemental
Indenture, is in all respects adopted, ratified and confirmed.

         Section 2.6 Notes Deemed Conformed. As of the date hereof, the
provisions of the Notes shall be deemed to be conformed, without the necessity
for any reissuance or exchange of such Note or any other action on the part of
the Holders of Notes, the Company or the Trustee, so as to reflect this Second
Supplemental Indenture.

         Section 2.7 Successors. All agreements of the Company, the Guarantors
and the Trustee in this Second Supplemental Indenture and in the Indenture shall
bind their respective successors and assigns, whether or not so expressed.

         Section 2.8 Benefits of Second Supplemental Indenture. Nothing in this
Second Supplemental Indenture, express or implied, shall give to any Person,
other than the parties hereto and their successors hereunder and the Holders of
Notes, any benefit or any legal or equitable right, remedy or claim under this
Second Supplemental Indenture or the Indenture.

         Section 2.9 Separability. In case any provision in this Second
Supplemental Indenture, or in the Indenture, shall be invalid, illegal or
unenforceable, the validity, legality and enforceability of the remaining
provisions shall not in any way be affected or impaired thereby, it being
intended that all of the provisions hereof shall be enforceable to the full
extent permitted by law.

         Section 2.10 Headings. The section headings of this Second Supplemental
Indenture have been inserted for convenience of reference only, are not to be
considered a part of this Second Supplemental Indenture and shall in no way
modify or restrict any of the terms or provisions hereof.

         Section 2.11 Definitions. Each capitalized term used but not defined in
this Second Supplemental Indenture shall have the meaning assigned to such term
in the Original Indenture.

         Section 2.12 GOVERNING LAW. THIS SECOND SUPPLEMENTAL INDENTURE SHALL BE
GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK,
BUT WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE
EXTENT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED
THEREBY.

         Section 2.13 Counterparts. This Second Supplemental Indenture may be
executed in two or more counterparts, each of which shall constitute an
original, but all of which when taken together shall constitute the same
instrument.

         Section 2.14 Trustee Not Responsible for Recitals. The recitals herein
contained are made by the Company and the Guarantors, and not by the Trustee,
and the Trustee assumes no responsibility for the correctness thereof. The
Trustee makes no representations as to the validity or sufficiency of this
Second Supplemental Indenture.

                                       5
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         IN WITNESS WHEREOF, the parties hereto have caused this Second
Supplemental Indenture to be duly executed, all as of the date first above
written.

                                             NOBLE DRILLING CORPORATION
                                             (the "Company")

                                             By: /s/ ROBERT D. CAMPBELL
                                                 -------------------------------
                                                 Robert D. Campbell
                                                 President

Attest:   [AUTHORIZED SIGNATOR]
       ----------------------------
       Title:

                                             NOBLE HOLDING (U.S.) CORPORATION
                                             ("HOLDING")

                                             By: /s/ ROBERT D. CAMPBELL
                                                 -------------------------------
                                                 Robert D. Campbell
                                                 President
Attest:   [AUTHORIZED SIGNATOR]
       ----------------------------
       Title:

                                             NOBLE CORPORATION
                                             ("NOBLE-CAYMAN")

                                             By: /s/ ROBERT D. CAMPBELL
                                                 -------------------------------
                                                 Robert D. Campbell
                                                 President
Attest:   [AUTHORIZED SIGNATOR]
       ----------------------------
       Title:

                                             JPMORGAN CHASE BANK, as Trustee

                                             By:    [AUTHORIZED SIGNATOR]
                                                 -------------------------------
                                                 Name:
                                                 Title:

Attest:   [AUTHORIZED SIGNATOR]
       ----------------------------
       Title:<PAGE>
                                                                    EXHIBIT 10.1

                               INDEMNITY AGREEMENT

         THIS INDEMNITY AGREEMENT (this "Agreement"), made and entered into as
of this ___ day of May, 2002, by and between NOBLE CORPORATION, a Cayman Islands
exempted company limited by shares (the "Company"), and ______________
("Indemnitee"), who is currently serving the Company in the capacity of a
director and/or officer thereof;

                                   WITNESSETH:

         WHEREAS, Noble Drilling Corporation, a Delaware corporation and an
indirect, wholly owned subsidiary of the Company ("Noble-Delaware"), and
Indemnitee have previously entered into an Indemnity Agreement dated as of
______________ (the "Original Indemnity Agreement"); and

         WHEREAS, pursuant to the Agreement and Plan of Merger, dated as of
March 11, 2002 (the "Merger Agreement"), among the Company, Noble-Delaware,
Noble Holding (U.S.) Corporation, a Delaware corporation, and Noble Cayman
Acquisition Corporation, a Delaware corporation ("Merger Sub"), Noble-Delaware
became an indirect, wholly owned subsidiary of the Company by way of the merger
of Merger Sub with and into Noble-Delaware, and the exchange of all of the
outstanding capital stock of Noble-Delaware for capital stock of the Company
(the "Merger"); and

         WHEREAS, in accordance with the Merger Agreement, at the Effective Time
of the Merger, the officers and directors of Noble-Delaware, including
Indemnitee, became the officers and directors of the Company; and

         WHEREAS, the parties desire to enter into this Agreement in order to
provide Indemnitee the same protections and indemnification provided to
Indemnitee under the Original Indemnity Agreement; and

         WHEREAS, the Company and Indemnitee recognize that the interpretation
of ambiguous statutes, regulations and court opinions, and of the Memorandum of
Association and Articles of Association of the Company, and the vagaries of
public policy, are too uncertain to provide the directors and officers of the
Company with adequate or reliable advance knowledge or guidance with respect to
the legal risks and potential liabilities to which they may become personally
exposed as a result of performing their duties in good faith for the Company;
and

         WHEREAS, the Company and Indemnitee are aware that highly experienced
and capable persons are often reluctant to serve as directors or officers of a
company unless they are protected to the fullest extent permitted by law by
comprehensive insurance or indemnification, especially since the legal risks and
potential liabilities, and the very threat thereof, associated with lawsuits
filed against the officers and directors of a company, and the resultant
substantial time, expense, harassment, ridicule, abuse and anxiety spent and
endured in defending against such lawsuits, whether or not meritorious, bear no
reasonable or logical relationship to the amount of compensation received by the
directors or officers from the company; and

         WHEREAS, Articles 112 through 121 of the Articles of Association of the
Company (the "Indemnification Articles") set forth certain provisions relating
to the mandatory and permissive

<PAGE>

indemnification of, and advancement of expenses to, officers and directors
(among others) of the Company by the Company; and

         WHEREAS, Article 117 of the Articles of Association of the Company
provides that the Indemnification Articles are specifically not exclusive of
other rights to which those indemnified under the Indemnification Articles may
be entitled under any agreement, vote of Members or disinterested directors or
otherwise, and, thus, does not limit the extent to which the Company may
indemnify persons serving as its officers and directors (among others); and

         WHEREAS, after due consideration and investigation of the terms and
provisions of this Agreement and the various other options available to the
Company and Indemnitee in lieu thereof, the board of directors of the Company
has determined that this Agreement is not only reasonable and prudent but
necessary to promote and ensure the best interests of the Company and its
Members; and

         WHEREAS, the Company desires to have Indemnitee serve or continue to
serve as an officer and/or director of the Company, free from undue concern for
unpredictable, inappropriate or unreasonable legal risks and personal
liabilities by reason of his acting in good faith in the performance of his duty
to the Company; and Indemnitee desires to serve, or to continue to serve
(provided that he is furnished the indemnity provided for hereinafter), in
either or both of such capacities;

         NOW, THEREFORE, in consideration of the premises and the mutual
agreements herein set forth and for other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the Company and
Indemnitee, intending to be legally bound, do hereby agree as follows:

         1. AGREEMENT TO SERVE. Indemnitee agrees to serve or continue to serve
as a director and/or officer of the Company, at the will of the Company or under
separate contract, if such exists, for so long as Indemnitee is duly elected or
appointed and qualified in accordance with the provisions of the Articles of
Association of the Company or until such time as Indemnitee tenders his
resignation in writing.

         2. DEFINITIONS. As used in this Agreement:

                  (a) The term "Proceeding" shall mean any action, suit or
proceeding, whether civil, criminal, administrative, arbitrative or
investigative, any appeal in such an action, suit or proceeding, and any inquiry
or investigation that could lead to such an action, suit or proceeding, except
one initiated by Indemnitee to enforce his rights under this Agreement.

                  (b) The term "Expenses" includes, without limitation, all
reasonable attorneys' fees, retainers, court costs, transcript costs, fees of
experts, witness fees, travel expenses, duplicating costs, printing and binding
costs, telephone charges, postage, delivery service fees and all other
disbursements or expenses of the types customarily incurred in connection with
prosecuting, defending, preparing to prosecute or defend, investigating, or
being or preparing to be a witness in a Proceeding.

                                       2
<PAGE>

                  (c) References to "other enterprise" shall include employee
benefit plans; references to "fines" shall include any (i) excise taxes assessed
with respect to any employee benefit plan and (ii) penalties; references to
"serving at the request of the Company" shall include any service as a director,
officer, employee or agent of the Company which imposes duties on, or involves
services by, such director, officer, employee or agent with respect to an
employee benefit plan, its participants or beneficiaries; and a person who acts
in good faith and in a manner he reasonably believes to be in the interest of
the participants and beneficiaries of an employee benefit plan shall be deemed
to have acted in a manner "not opposed to the best interests of the Company" as
referred to in this Agreement.

         3. INDEMNITY IN THIRD PARTY PROCEEDINGS. The Company shall indemnify
Indemnitee in accordance with the provisions of this Section 3 if Indemnitee is
a party to or is threatened to be made a party to or otherwise involved in any
threatened, pending or completed Proceeding (other than a Proceeding by or in
the right of the Company to procure a judgment in its favor) by reason of the
fact that Indemnitee is or was a director and/or officer of the Company, or is
or was serving at the request of the Company as a director, officer, employee or
agent of another corporation, partnership, joint venture, trust or other
enterprise, against all Expenses, judgments, fines and amounts paid in
settlement actually and reasonably incurred by Indemnitee in connection with
such Proceeding, provided it is determined pursuant to Section 7 of this
Agreement or by the court having jurisdiction in the matter, that Indemnitee
acted in good faith and in a manner that he reasonably believed to be in or not
opposed to the best interests of the Company, and, with respect to any criminal
Proceeding, had no reasonable cause to believe his conduct was unlawful. The
termination of any Proceeding by judgment, order, settlement or conviction, or
upon a plea of nolo contendere or its equivalent, shall not, of itself, create a
presumption that Indemnitee did not act in good faith and in a manner that he
reasonably believed to be in or not opposed to the best interests of the
Company, and, with respect to any criminal Proceeding, had reasonable cause to
believe that his conduct was unlawful.

         4. INDEMNITY IN PROCEEDINGS BY OR IN THE RIGHT OF THE COMPANY. The
Company shall indemnify Indemnitee in accordance with the provisions of this
Section 4 if Indemnitee is a party to or is threatened to be made a party to or
otherwise involved in any threatened, pending or completed Proceeding by or in
the right of the Company to procure a judgment in its favor by reason of the
fact that Indemnitee is or was a director and/or officer of the Company, or is
or was serving at the request of the Company as a director, officer, employee or
agent of another corporation, partnership, joint venture, trust or other
enterprise, against all Expenses actually and reasonably incurred by Indemnitee
in connection with the defense, settlement or other disposition of such
Proceeding, but only if he acted in good faith and in a manner that he
reasonably believed to be in or not opposed to the best interests of the
Company, except that no indemnification shall be made under this Section 4 in
respect of any claim, issue or matter as to which Indemnitee shall have been
adjudged to be liable to the Company unless and only to the extent that the
court in which such Proceeding was brought shall determine upon application
that, despite the adjudication of liability but in view of all the circumstances
of the case, Indemnitee is fairly and reasonably entitled to indemnity for such
Expenses as such court shall deem proper.

         5. INDEMNIFICATION FOR EXPENSES OF SUCCESSFUL PARTY. Notwithstanding
any other provision of this Agreement to the contrary, to the extent that
Indemnitee has been successful on the merits or otherwise in defense of any
Proceeding referred

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<PAGE>

to in Sections 3 and/or 4 of this Agreement, or in defense of any claim, issue
or matter therein, including dismissal without prejudice, Indemnitee shall be
indemnified against all Expenses actually and reasonably incurred by Indemnitee
in connection therewith.

         6. ADVANCES OF EXPENSES. The Expenses incurred by Indemnitee pursuant
to Sections 3 and/or 4 of this Agreement in connection with any Proceeding
shall, at the written request of Indemnitee, be paid by the Company in advance
of the final disposition of such Proceeding upon receipt by the Company of an
undertaking by or on behalf of Indemnitee ("Indemnitee's Undertaking") to repay
such amount to the extent that it is ultimately determined that Indemnitee is
not entitled to be indemnified by the Company. The request for advancement of
Expenses by Indemnitee and the undertaking to repay of Indemnitee, which need
not be secured, shall be substantially in the form of EXHIBIT A to this
Agreement.

         7. RIGHT OF INDEMNITEE TO INDEMNIFICATION OR ADVANCEMENT OF EXPENSES
UPON APPLICATION; PROCEDURE UPON APPLICATION.

                  (a) Any indemnification under Sections 3 and/or 4 of this
Agreement shall be made no later than 45 days after receipt by the Company of
the written request of Indemnitee, unless a determination is made within said
45-day period by (i) a majority vote of the directors of the Company who are not
parties to the involved Proceeding, even though less than a quorum, or (ii)
independent legal counsel in a written opinion (which counsel shall be appointed
if there are no such directors or if such directors so direct), that Indemnitee
has not met the applicable standards for indemnification set forth in Section 3
or 4, as the case may be.

                  (b) Any advancement of Expenses under Section 6 of this
Agreement shall be made no later than 10 days after receipt by the Company of
Indemnitee's Undertaking.

                  (c) In any action to establish or enforce the right of
indemnification or to receive advancement of Expenses as provided in this
Agreement, the burden of proving that indemnification or advancement of Expenses
is not appropriate shall be on the Company. Neither the failure of the Company
(including its board of directors or independent legal counsel) to have made a
determination prior to the commencement of such action that indemnification or
advancement of Expenses is proper in the circumstances because Indemnitee has
met the applicable standard of conduct, nor an actual determination by the
Company (including its board of directors or independent legal counsel) that
Indemnitee has not met such applicable standard of conduct, shall be a defense
to the action or create a presumption that Indemnitee has not met the applicable
standard of conduct. Expenses incurred by Indemnitee in connection with
successfully establishing or enforcing his right of indemnification or to
receive advancement of Expenses, in whole or in part, under this Agreement shall
also be indemnified by the Company.

         8. INDEMNIFICATION AND ADVANCEMENT OF EXPENSES UNDER THIS AGREEMENT NOT
EXCLUSIVE. The rights of indemnification and to receive advancement of Expenses
as provided by this Agreement shall not be deemed exclusive of any other rights
to which Indemnitee may be entitled under the Articles of Association of the
Company, any other agreement, any vote of Members or disinterested directors of
the Company, the Cayman Islands Companies Law (2001 Second Revision), or
otherwise, both as to action in his official capacity and as to action in
another capacity while holding such office.

                                       4
<PAGE>

         9. PARTIAL INDEMNIFICATION. If Indemnitee is entitled under any
provision of this Agreement to indemnification or to receive advancement by the
Company for some or a portion of the Expenses, judgments, fines or amounts paid
in settlement actually and reasonably incurred by Indemnitee in the
investigation, defense, appeal, settlement or other disposition of any
Proceeding, but not, however, for the total amount thereof, the Company shall
nevertheless indemnify Indemnitee for the portion thereof to which Indemnitee is
entitled.

         10. RIGHTS CONTINUED. The rights of indemnification and to receive
advancement of Expenses as provided by this Agreement shall continue as to
Indemnitee even though Indemnitee may have ceased to be a director or officer of
the Company and shall inure to the benefit of Indemnitee's personal or legal
representatives, executors, administrators, successors, heirs, distributees,
devisees and legatees.

         11. NO CONSTRUCTION AS AN EMPLOYMENT AGREEMENT OR ANY OTHER COMMITMENT.
Nothing contained in this Agreement shall be construed as giving Indemnitee any
right to be retained in the employ of the Company or any of its subsidiaries, if
Indemnitee currently serves as an officer of the Company, or to be renominated
as a director of the Company, if Indemnitee currently serves as a director of
the Company.

         12. LIABILITY INSURANCE. To the extent the Company maintains an
insurance policy or policies providing directors' and officers' liability
insurance, Indemnitee shall be covered by such policy or policies in accordance
with its or their terms to the maximum extent of the coverage available for any
director or officer of the Company under such policy or policies.

         13. NO DUPLICATION OF PAYMENTS. The Company shall not be liable under
this Agreement to make any payment of amounts otherwise indemnifiable under this
Agreement if, and to the extent that, Indemnitee has otherwise actually received
such payment under any contract, agreement or insurance policy, the Articles of
Association of the Company, or otherwise.

         14. SUBROGATION. In the event of payment under this Agreement, the
Company shall be subrogated to the extent of such payment to all the rights of
recovery of Indemnitee, who shall execute all papers required and shall do
everything that may be necessary to secure such rights, including without
limitation the execution of such documents as may be necessary to enable the
Company effectively to bring suit to enforce such rights.

         15. EXCEPTIONS. Notwithstanding any other provision in this Agreement,
the Company shall not be obligated pursuant to the terms of this Agreement, to
indemnify or advance Expenses to Indemnitee with respect to any Proceeding, or
any claim therein, (i) brought or made by Indemnitee against the Company, or
(ii) in which final judgment is rendered against Indemnitee for an accounting of
profits made from the purchase and sale or the sale and purchase by Indemnitee
of securities of the Company pursuant to the provisions of Section 16(b) of the
U.S. Securities Exchange Act of 1934, as amended, or similar provisions of any
national, state, provincial or local statute.

         16. NOTICES. Any notice or other communication required or permitted to
be given or made to the Company or Indemnitee pursuant to this Agreement shall
be given or made in writing by depositing the same in the Cayman Islands or
United States mail, with postage

                                       5
<PAGE>

thereon prepaid, addressed to the person to whom such notice or communication is
directed at the address of such person on the records of the Company, and such
notice or communication shall be deemed given or made at the time when the same
shall be so deposited in the Cayman Islands or United States mail. Any such
notice or communication to the Company shall be addressed to the Secretary of
the Company.

         17. CONTRACTUAL RIGHTS. The right to be indemnified or to receive
advancement of Expenses under this Agreement (i) is a contract right based upon
good and valuable consideration, pursuant to which Indemnitee may sue, (ii) is
and is intended to be retroactive and shall be available as to events occurring
prior to the date of this Agreement and (iii) shall continue after any
rescission or restrictive modification of this Agreement as to events occurring
prior thereto.

         18. SEVERABILITY. If any provision or provisions of this Agreement
shall be held to be invalid, illegal or unenforceable for any reason whatsoever,
the validity, legality and enforceability of the remaining provisions shall not
in any way be affected or impaired thereby; and, to the fullest extent possible,
the provisions of this Agreement shall be construed so as to give effect to the
intent manifested by the provisions held invalid, illegal or unenforceable.

         19. SUCCESSORS; BINDING AGREEMENT. The Company shall require any
successor to all or substantially all of the business and/or assets of the
Company (whether direct or indirect, by purchase, merger, amalgamation,
consolidation or otherwise), by agreement in form and substance reasonably
satisfactory to Indemnitee, to 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 if no such succession had taken place. As used in this
Agreement, "Company" shall mean the Company as hereinbefore defined and any
successor to its business and/or assets as aforesaid which executes and delivers
the agreement provided for in this Section 19 or which otherwise becomes bound
by the terms and provisions of this Agreement by operation of law.

         20. COUNTERPARTS, MODIFICATION, HEADINGS, GENDER.

                  (a) This Agreement may be executed in any number of
counterparts, each of which shall constitute one and the same instrument, and
either party hereto may execute this Agreement by signing any such counterpart.

                  (b) No provisions of this Agreement may be modified, waived or
discharged unless such waiver, modification or discharge is agreed to in writing
and signed by Indemnitee and an appropriate officer of the Company. No waiver by
any party at any time of any breach by any other party of, or compliance with,
any condition or provision of this Agreement to be performed by any other party
shall be deemed a waiver of similar or dissimilar provisions or conditions at
the same time or at any prior or subsequent time.

                  (c) Section headings are not to be considered part of this
Agreement, are solely for convenience of reference, and shall not affect the
meaning or interpretation of this Agreement or any provision set forth herein.

                                       6
<PAGE>

                  (d) Pronouns in masculine, feminine and neuter genders shall
be construed to include any other gender, and words in the singular form shall
be construed to include the plural and vice versa, unless the context otherwise
requires.

         21. ASSIGNABILITY. This Agreement shall not be assignable by either
party without the consent of the other.

         22. EXCLUSIVE JURISDICTION; GOVERNING LAW. The Company and Indemnitee
agree that all disputes in any way relating to or arising under this Agreement,
including, without limitation, any action for advancement of Expenses or
indemnification, shall be litigated, if at all, exclusively in the courts of the
Cayman Islands, and, if necessary, the corresponding appellate courts. This
Agreement shall be governed by and construed and enforced in accordance with the
laws of the Cayman Islands applicable to contracts made and to be performed in
such jurisdiction without giving effect to the principles of conflicts of laws.
The Company and Indemnitee expressly submit themselves to the personal
jurisdiction of the Cayman Islands for the purposes of resolving any dispute
relating to or arising under this Agreement.

         23. TERMINATION.

                  (a) This Agreement shall terminate upon the mutual agreement
of the parties that this Agreement shall terminate or upon the death of
Indemnitee or the resignation, retirement, removal or replacement of Indemnitee
from all of his positions as a director and/or officer of the Company and any of
its subsidiaries.

                  (b) The termination of this Agreement shall not terminate:

                           (i) the Company's liability for claims or actions
against Indemnitee arising out of or related to acts, omissions, occurrences,
facts or circumstances occurring or alleged to have occurred prior to such
termination; or

                           (ii) the applicability of the terms and conditions of
this Agreement to such claims or actions.

       [Balance of page left intentionally blank; signature page follows.]

                                       7
<PAGE>

         IN WITNESS WHEREOF, the Company and Indemnitee have executed this
Agreement as of the date and year first above written.

                                                    NOBLE CORPORATION

                                                    By:  [AUTHORIZED SIGNATOR]
                                                        ------------------------
                                                    Name:
                                                          ----------------------
                                                    Title:
                                                           ---------------------

                                                    INDEMNITEE

                                                    ----------------------------

                                       8
<PAGE>

                                                                       EXHIBIT A

                            INDEMNITEE'S UNDERTAKING

__________, 20__

Noble Corporation
13135 South Dairy Ashford, Suite 800
Sugar Land, Texas 77478

RE: INDEMNITY AGREEMENT

Gentlemen:

         Reference is made to the Indemnity Agreement dated as of May __, 2002
by and between Noble Corporation (the "Company") and the undersigned Indemnitee,
and particularly to Section 6 thereof relating to advance payment by the Company
of certain Expenses incurred by the undersigned Indemnitee. Capitalized terms
used and not otherwise defined in this Indemnitee's Undertaking shall have the
respective meanings ascribed to such terms in the Agreement.

         The undersigned Indemnitee has incurred Expenses pursuant to Section 3
and/or 4 of the Agreement in connection with a Proceeding. The types and amounts
of Expenses are itemized on Attachment I to this Indemnitee's Undertaking. The
undersigned Indemnitee hereby requests that the total amount of these Expenses
(the "Advanced Amount") be paid by the Company in advance of the final
disposition of such Proceeding in accordance with the Agreement.

         The undersigned Indemnitee hereby agrees to repay the Advanced Amount
to the Company to the extent that it is ultimately determined that the
undersigned Indemnitee is not entitled to be indemnified by the Company. This
agreement of Indemnitee to repay shall be unsecured.

                                              ----------------------------------
                                              Very truly yours,

                                              ----------------------------------
                                              Signature

                                              ----------------------------------
                                              Name of Indemnitee (Type or Print)

                                      A-1
<PAGE>

                                 ATTACHMENT I TO
                            INDEMNITEE'S UNDERTAKING

                                 ITEMIZATION OF
                          TYPES AND AMOUNTS OF EXPENSES

         Attached hereto are receipts, statements or invoices for the following
qualifying Expenses which Indemnitee represents have been incurred by Indemnitee
in connection with a Proceeding:

<Table>
<Caption>

                  TYPE                                  AMOUNT
                  ----                                  ------
<S>                                                     <C>

1.

                                                        ------
                  Total Advanced Amount
                                                        ------
</Table>

                                      A-2

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