POWER OF ATTORNEY
					(For Executing Forms 3, 4, and 5)

	KNOW ALL
MEN BY THESE PRESENTS that the undersigned hereby constitutes and appoints
each of Steven R. Mackey, Cathy C. Olaniyan,  Jonathan M. Cinocca, and Judy
E. Kidd signing singly, his true and lawful attorney-in-fact to:


	(1)	execute for and on behalf of the undersigned Forms 3, 4, and 5 in
accordance with Section 16(a) of the Securities Exchange Act of 1934 and
the rules thereunder;

	(2)	do and perform any and all acts for and on
behalf of the undersigned which may be necessary or desirable to complete
the execution of any such Form 3, 4, or 5 and the timely filing of such
Form with the United States Securities and Exchange Commission and any
other authority; and

	(3)	take any other action of any type whatsoever
in connection with the foregoing which, in the opinion of such
attorney-in-fact, may be of benefit to, in the best interest of, or legally
required by the undersigned, it being understood that the documents
executed by such attorney-in-fact on behalf of the undersigned pursuant to
this Power of Attorney shall be in such form and shall contain such terms
and conditions as such attorney-in-fact may approve in his/her discretion.


	The undersigned hereby grants to each such attorney-in-fact full
power and authority to do and perform each and every act and thing
whatsoever requisite, necessary, and proper to be done in the exercise of
any of the rights and powers herein granted, as fully to all intents and
purposes as the undersigned might or could do if personally present, with
full power of substitution or revocation, hereby ratifying and confirming
all that such attorney-in-fact or his substitute or substitutes shall
lawfully do or cause to be done by virtue of this Power of Attorney and the
rights and powers herein granted.  The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such capacity at the request of
the undersigned, are not assuming any of the undersigned's responsibilities
to comply with Section 16 of the Securities Exchange Act of 1934.

	IN
WITNESS WHEREOF, the undersigned has caused this Power of attorney to be
executed as of this 4th day of December, 2002.



						Signature
									   /s/ Paula Marshall-Chapman
						Paula
Marshall-Chapman
						Print Name

CERTIFICATION

	The
undersigned hereby certifies that he/she has read and understands, and
agrees to comply with, the Company's insider trading policy, a copy of
which was distributed with this Certification form.

Dated: December 4,
2002
						Signature
									   /s/ Paula Marshall-Chapman

						Paula Marshall-Chapman
						Print Name