Document:

exv10w1

EXHIBIT 10.1

May 9, 2008

Loren K. Carroll

RE: Letter Agreement on Non-Competition

Dear Loren:

I am writing to you to set out decisions we have reached regarding the need to replace the
non-competition restriction set out in paragraph 14 of the Employment Agreement between you and
Smith International, Inc. (“Smith”) that was effective April 30, 2006 (the “Employment Agreement”).
We have agreed that, now that you are no longer a Smith Employee, a one-year period of
non-competition is insufficient to protect Smith’s interests, including its trade secrets and other
confidential information, given current market conditions. Thus, this letter (this “Agreement”)
sets out the following agreements that shall supersede paragraph 14 of the Employment Agreement:

1. Non-Competition Payment: In consideration for your agreement to the terms of the
Protective Covenants set forth herein, you will receive the sum of $1,887,197.00 (the
“Non-Competition Payment”). Smith will pay the Non-Competition Payment in two equal installments
with the first payable on December 15, 2008, and the second payable on December 15, 2009. The
Non-Competition Payment is separate from any severance or other separation benefits to which you
may otherwise be entitled under any other agreement with, or plan or program maintained by, Smith
and will not be considered compensation under any compensation or benefit plan maintained,
sponsored, or provided by Smith. You will not perform any services for Smith in return for the
Non-Competition Payment as it is solely paid to you as consideration for agreeing to the
non-competition covenant set out below. Smith will issue you an IRS Form 1099 for each payment and
any taxes which may become due as a result of any payment or transaction contemplated by this
Agreement are your sole responsibility, and you agree to hold Smith harmless on account thereof.

2. Protective Covenants: You agree that Smith has given you access to Confidential
Information related to Smith’s business. You agree that a simple agreement not to disclose or use
such Confidential Information is inadequate, standing alone, to protect Smith’s legitimate business
interests because some activities by a former executive, like you, will by their very nature,
compromise Smith’s Confidential Information. You also recognize and agree that, to the extent your
position with Smith has involved contact with customers or employees of Smith, your duties have
included developing goodwill for Smith’s benefit with these persons and businesses and not for
purposes of personal gain independent from Smith. You, therefore, agree that the following
covenants are reasonable and necessary agreements for the protection of the business interests
covered in the fully enforceable, ancillary agreements under which you were employed by Smith. You
recognize that violations of covenants such as these, whether intentional or not, are frequently
undetectable by Smith until it is too late and will cause irreparable injury to Smith. To prevent
this kind of irreparable harm, you agree that for a period of two (2) years following the first
date set out above (the “Non-Competition Period”), you will abide by the following “Protective
Covenants”:

(a) You will not provide services to a Competitor in any role or position (as an employee,
consultant, or otherwise) that would involve Conflicting Business Activities;

(b) You will not (in person or through material assistance to others) knowingly participate in
soliciting or communicating with the customers of Smith that you had business-related contact with
or were provided Confidential Information about in the last two years of your employment with Smith
for the purpose of pursuing a Competing Line of Business; and

(c) You will not (in person or through assistance to others) knowingly participate in soliciting or
communicating with any Smith Employee that you worked with or were provided Confidential
Information about in the last two years of your employment with Smith for the purpose of persuading
or helping any Smith Employee to end or reduce his or her employment relationship with Smith.

 

 

For purposes of this Agreement, “Competitor” means a person, entity, or separately operated
business unit of an entity, that engages in a Competing Line of Business. “Competing Line of
Business” means a business that involves a product or service offered by anyone other than Smith
that would replace or compete with any product or service offered or to be offered by Smith that
you had material involvement with while employed by Smith unless Smith is no longer engaged in or
planning to engage in that line of business at the relevant time of enforcement. “Conflicting
Business Activities” means business-related activities and/or job duties in the United States, and
any other country where you did business on behalf of Smith, that are the same as or similar to the
job duties and/or business-related activities you participated in or were provided Confidential
Information about in the last two years of your employment with Smith, or the supervision of such
duties and/or activities. “Smith Employee” means an individual employed by or, for purposes of
this Agreement only, retained as a consultant to Smith.

For purposes of this Agreement, the term “Confidential Information” includes any single piece of
information or compilations of information, in any form, tangible or intangible, related to Smith’s
business that Smith has not made public or authorized public disclosure of and that is not
generally known to the public or to other persons who might obtain value or competitive advantage
from its disclosure or use. Confidential Information includes trade secrets, but an item of
Confidential Information need not qualify as a trade secret to be protected by this Agreement.
Confidential Information includes both information belonging to Smith and confidential information
belonging to third parties, such as customers, prospective customers, suppliers, and vendors, to
which you had access by virtue of your role with Smith. Further, Smith’s controlled disclosure of
Confidential Information to customers and other third party business associates for legitimate
business purposes does not remove such information from protected status as Confidential
Information under this Agreement. Confidential Information that is intentionally made available to
the general public by Smith or with Smith’s express authorization will not be considered
Confidential Information under this Agreement.

You acknowledge that you have received Confidential Information and/or developed business goodwill
with customers through, or in the course of, past association with Smith. The nature and scope of
restrictions necessary to protect the parties’ interests related to these past events is
unresolved. In exchange for the payments and other good and valuable consideration provided to you
through this Agreement, you agree to fully settle and resolve any and all disputes you have with
Smith regarding the exact nature of the restrictions on your future conduct that are reasonable and
necessary to protect Smith’s Confidential Information or other legitimate business interests. You
agree that this Agreement benefits both Smith and you because, among other things, it provides
finality and predictability for both Smith and you regarding enforceable boundaries on future
conduct. Accordingly, you agree that this Agreement and the restrictions in it should be enforced
under the common law rules favoring the enforcement of settlement agreements. For these reasons,
you agree that you will not sue or pursue a legal action to set aside or avoid application of the
Protective Covenants. You also understand and agree that should you sue or pursue a legal action
to set aside or avoid the application of the Protective Covenants, you must repay the entire amount
of Non-Competition Payment to Smith within ten (10) business days of initiating such an action. If
you accept a position with a Competitor within the Non-Competition Period, you agree that you will
promptly give written notice to Smith’s General Counsel and will provide Smith with the information
it needs about your new position to determine whether such position would likely lead to a
violation of this Agreement.

You also understand and agree that if you violate this Agreement (and particularly the Protective
Covenants), Smith will be entitled to (a) injunctive relief by temporary restraining order,
temporary injunction, and/or permanent injunction, (b) recovery of the attorney’s fees and costs
incurred by Smith in obtaining such relief where allowed by law, (c) damages, and (d) any other
legal and equitable relief to which it may be entitled. Injunctive relief will not exclude other
remedies that might apply. Further, if you a violate a restriction in the Protective Covenants,
the time period for that restriction will be extended by one day for each day you are found to have
violated it, up to a maximum extension equal to the original length of time prescribed for the
restriction.

3. Entire Agreement: You agree that this Agreement sets forth the entire agreement between
you and Smith concerning the subject matter addressed herein. You further agree that you have not
relied on any representations or statements not set forth in this Agreement with regard to the
subject matter, basis or effect of this Agreement. This Agreement may be amended only in writing,
signed by you and Smith’s Senior Vice President, Human Resources. Nothing in this Agreement is
intended to or creates a contract of employment for a specific term and your employment with Smith
terminated before you entered this Agreement.

 

 

4. Severability and Reformation: If any provision contained in this Agreement is
determined to be void, illegal or unenforceable, in whole or in part, then the other provisions
contained herein will remain in full force and effect as if the provision so determined had not
been contained herein. If the restrictions provided in this Agreement are deemed unenforceable as
written, the parties expressly authorize the adjudicating authority to revise, delete, or add to
such restrictions to the extent necessary to enforce the intent of the parties and to provide
Smith’s goodwill, confidential information, and other business interests with effective protection.

5. Governing Law and Venue: This Agreement is made and entered into, and is to be governed
by and construed in accordance with, the laws of the State of Texas without regard to its laws on
conflicts of law. However, the rule of construction against the drafter shall not be employed.
The parties agree that the exclusive venue for any dispute arising under or relating to this
Agreement shall be the State of Texas. You stipulate and consent to a Texas court’s personal
jurisdiction over you, and waive any right to objection to such jurisdiction.

Loren, please sign and date below to evidence your agreement with the terms set forth herein and
return the executed original me within five (5) days. If you do not do so, this letter agreement
will become null and void.

	 	 	 	 	 
	 

	 	Sincerely,	 	 
	 
	 	 	 	 
	 

	 	/s/ Malcolm W. Anderson
 

Malcolm W. Anderson
	 	 
	 

	 	Senior Vice President,	 	 
	 

	 	Human Resources	 	 

I, Loren K. Carroll, have read, understand, and fully agree to the terms and conditions set forth
above and, by my signature below, hereby voluntarily accept and agree to those terms and
conditions.

	 	 	 
	/s/ Loren K. Carroll
 

Loren K. Carroll

	 	 
	 
	 	 
	May 9, 2008
 

Dateexv10w1

Exhibit 10.1

Form of

Request for Approval of Extension of Maturity Date and Amendment

February 18, 2008

VIA INTRALINKS

THE LENDERS UNDER THE APACHE

CORPORATION 2006 U.S. CREDIT FACILITY

	 	 	 	Re: Apache Corporation 2006 U.S. $1,500,000,000 Five-Year Senior Revolving Credit
Facility

Ladies and Gentlemen:

Reference is made to that certain Amended and Restated Credit Agreement, dated as of May 9,
2006 (together with all amendments, if any, from time to time made thereto, the “Five-Year
Credit Agreement”), among Apache Corporation (the “Borrower”), the Lenders party
thereto, JPMorgan Chase Bank, N.A., as Administrative Agent (the “Administrative Agent”),
and the other agents party thereto. Terms defined in the Credit Agreement are used herein with the
same meanings.

I. Extension of the Credit Facility

In the February 18, 2008 Annual Certificate of Extension delivered to the Administrative Agent
which is attached hereto as Exhibit A, Borrower requested pursuant to Section 2.6 of the
Credit Agreement the extension of the Maturity Date, and concomitantly the total Commitments under
the Credit Agreement from May 28, 2012 to May 28, 2013. The Borrower hereby certifies that no
Event of Default has occurred and is continuing under the Credit Agreement.

This letter is to confirm that the Lenders hereby agree to the extension of the Maturity Date
under the Credit Agreements and the related Commitments of the Lenders from May 28, 2012 to May 28,
2013.

II. Amendment of the Credit Facility

The Borrower, the Administrative Agent and the Required Lenders hereby agree as follows:

A. The definition of “Restricted Subsidiary” contained in Section 1.1 of the Credit
Agreement is amended in its entirety to read as follows:

“ “Restricted Subsidiary” means any Subsidiary of Borrower that owns any
asset representing or consisting of an entitlement to production from, or other
interest in, reserves of oil, gas or other minerals in place located in the United

 

 

THE LENDERS UNDER THE APACHE

CORPORATION 2006 FIVE-YEAR CREDIT FACILITY

February 18, 2008

Page 2

States or Canada, including, without limitation, Apache Canada Ltd., a corporation
organized under the laws of the Province of Alberta, Canada.”

Please indicate your consent to (i) the extension of the Maturity Date under the Credit
Agreements and the related Commitments of the Lenders from May 28, 2012 to May 28, 2013 and (ii) to
the amendment outlined above by having an authorized signatory of your financial institution
execute this letter in the space provided below and returning the executed page by the end of
business on Tuesday, March 4, 2008, (i) via telecopy to Frank Bradley at (713) 754-6630, and (ii)
via courier to: Greenberg Traurig LLP, 1000 Louisiana, Suite 1700, Houston, Texas 77002, Attention:
Frank Bradley.

This letter may be executed in any number of counterparts and all such counterparts shall
together constitute but one and the same letter.

By execution hereof, the Administrative Agent acknowledges its agreement and consent to the
request for extension and to the amendment outlined above in its capacity as a Lender and as
Administrative Agent, respectively.

If you have any questions, please do not hesitate to contact either Lisa Kopff of the
Administrative Agent at (212) 270-6091, Pete Czerniakowski of Apache Corporation at (713) 296-6642
or Frank Bradley at Greenberg Traurig LLP at (713) 374-3630.

	 	 	 	 	 
	 	JPMORGAN CHASE BANK, N.A., as Administrative Agent
and as a Lender

 
	 	By:  	 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 

 

 

	 	 	 	 	 

THE LENDERS UNDER THE APACHE

CORPORATION 2006 FIVE-YEAR CREDIT FACILITY

February 18, 2008

Page 3

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	CITIBANK, N.A., as a Lender

 	 
	 	By:  	 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 
	 

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	BANK OF AMERICA, N.A., as a Lender

 	 
	 	By:  	 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 
	 

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
      DAY OF ___, 2008.

	 	 	 	 	 
	 	BNP PARIBAS, as a Lender	 
	 	 	 
	 	By:  	
 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 
	 
	 	 	 
	 	By:  	
 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 

 

 

	 	 	 	 	 

THE LENDERS UNDER THE APACHE

CORPORATION 2006 FIVE-YEAR CREDIT FACILITY

February 18, 2008

Page 4

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	UBS LOAN FINANCE LLC, as a Lender

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

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	BMO CAPITAL MARKETS FINANCING, INC. (f/k/a

HARRIS NESBITT FINANCING, INC.), as a Lender

 
	 	By:  	 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 

 

 

	 	 	 	 	 

THE LENDERS UNDER THE APACHE

CORPORATION 2006 FIVE-YEAR CREDIT FACILITY

February 18, 2008

Page 5

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	DEUTSCHE BANK AG NEW YORK BRANCH, as a Lender

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

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	ROYAL BANK OF CANADA, as a Lender

 	 
	 	By:  	 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 

 

 

	 	 	 	 	 

THE LENDERS UNDER THE APACHE

CORPORATION 2006 FIVE-YEAR CREDIT FACILITY

February 18, 2008

Page 6

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	UNION BANK OF CALIFORNIA, N.A., as a Lender

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

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	WACHOVIA BANK, NATIONAL ASSOCIATION, as a Lender

 	 
	 	By:  	 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 

 

 

	 	 	 	 	 

THE LENDERS UNDER THE APACHE

CORPORATION 2006 FIVE-YEAR CREDIT FACILITY

February 18, 2008

Page 7

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	ABN AMRO BANK N.V., as a Lender

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

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	BAYERISCHE LANDESBANK — CAYMAN ISLANDS BRANCH, as a

Lender

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

 

 

	 	 	 	 	 

THE LENDERS UNDER THE APACHE

CORPORATION 2006 FIVE-YEAR CREDIT FACILITY

February 18, 2008

Page 8

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	CALYON NEW YORK BRANCH, as a Lender

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

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	WILLIAM STREET COMMITMENT CORPORATION, as a Lender

 	 
	 	By:  	 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 
	 

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	HSBC BANK USA, NATIONAL ASSOCIATION, as a Lender

 	 
	 	 	 
	 	 	 
	 	 	 
	 
	 	By:  	 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 

 

 

THE LENDERS UNDER THE APACHE

CORPORATION 2006 FIVE-YEAR CREDIT FACILITY

February 18, 2008

Page 9

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	MORGAN STANLEY BANK, as a Lender

 	 
	 	By:  	 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 
	 

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	THE ROYAL BANK OF SCOTLAND PLC , as a Lender
	 
	 	By:  	
 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 
	 

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	SOCIÉTÉ GÉNÉRALE, as a Lender

 	 
	 	By:  	 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 

 

 

	 	 	 	 	 

THE LENDERS UNDER THE APACHE

CORPORATION 2006 FIVE-YEAR CREDIT FACILITY

February 18, 2008

Page 10

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	SUMITOMO MITSUI BANKING CORPORATION, as a Lender

 	 
	 	By:  	 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 
	 

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	MIZUHO CORPORATE BANK, LTD., as a Lender

 	 
	 	By:  	 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 
	 

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	WELLS FARGO BANK, NA, as a Lender

 	 
	 	By:  	 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 

 

 

	 	 	 	 	 

THE LENDERS UNDER THE APACHE

CORPORATION 2006 FIVE-YEAR CREDIT FACILITY

February 18, 2008

Page 11

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	BARCLAYS BANK PLC, as a Lender

 	 
	 	By:  	 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 
	 

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	TORONTO DOMINION (TEXAS) LLC, as a Lender

 	 
	 	By:  	 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 
	 

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	AMEGY BANK NATIONAL ASSOCIATION, as a Lender

 	 
	 	By:  	 	 
	 	 	Name:  	 	 
	 	 	Title:  	 	 

 

 

	 	 	 	 	 

THE LENDERS UNDER THE APACHE

CORPORATION 2006 FIVE-YEAR CREDIT FACILITY

February 18, 2008

Page 12

THE UNDERSIGNED AGREES AND CONSENTS TO (i) THE REQUESTED EXTENSION OF THE MATURITY DATE AND
COMMITMENTS UNDER THE CREDIT AGREEMENT AND (ii) TO THE AMENDMENT OUTLINED ABOVE, EACH AS OF THIS
           DAY OF ___, 2008.

	 	 	 	 	 
	 	BANCO BILBAO VIZCAYA ARGENTARIA S.A., as a Lender

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

ACKNOWLEDGED AND AGREED:

APACHE CORPORATION, as Borrower

	 	 	 	 	 
	 	 	 
	By:  	
 	 	 
	 	Name:  	Matthew W. Dundrea 	 	 
	 	Title:  	Vice President and Treasurer 	 	 

 

 

	 	 	 	 	 

EXHIBIT A

2008 Annual Certificate of Extension

[see attached]

Exhibit A — Page 1

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