POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that I, the undersigned, do hereby
constitute and appoint Susan S. Keith, Margaret E. Carriere and Bruce A.
Metzinger, or any of them acting alone, my true and lawful attorneys-in-fact and
agents, with full power of substitution and resubstitution, to prepare and sign
for me, and in my name, place and stead, in any and all capacities, any and all
reports as may from time to time be required under Section 16(a) of the
Securities Exchange Act of 1934, as amended, and the rules, regulations and
requirements of the Securities and Exchange Commission in respect thereof, and
to file the same with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done (with full power to each
of them to act alone), as fully and to all intents and purposes as I might or
could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents or any of them, or their substitutes, may lawfully
do or cause to be done by virtue hereof.
This Power of Attorney shall remain in full force and effect until revoked
by me in writing.
IN WITNESS WHEREOF, I hereto set my hand this 21st day of May, 2002.
/s/ Robert L. Crandall
----------------------
Robert L. Crandall
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that I, the undersigned, do hereby
constitute and appoint Susan S. Keith, Margaret E. Carriere and Bruce A.
Metzinger, or any of them acting alone, my true and lawful attorneys-in-fact and
agents, with full power of substitution and resubstitution, to prepare and sign
for me, and in my name, place and stead, in any and all capacities, any and all
reports as may from time to time be required under Section 16(a) of the
Securities Exchange Act of 1934, as amended, and the rules, regulations and
requirements of the Securities and Exchange Commission in respect thereof, and
to file the same with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done (with full power to each
of them to act alone), as fully and to all intents and purposes as I might or
could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents or any of them, or their substitutes, may lawfully
do or cause to be done by virtue hereof.
This Power of Attorney shall remain in full force and effect until revoked
by me in writing.
IN WITNESS WHEREOF, I hereto set my hand this 24th day of May, 2002.
/s/ Kenneth T. Derr
-------------------
Kenneth T. Derr
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that I, the undersigned, do hereby
constitute and appoint Susan S. Keith, Margaret E. Carriere and Bruce A.
Metzinger, or any of them acting alone, my true and lawful attorneys-in-fact and
agents, with full power of substitution and resubstitution, to prepare and sign
for me, and in my name, place and stead, in any and all capacities, any and all
reports as may from time to time be required under Section 16(a) of the
Securities Exchange Act of 1934, as amended, and the rules, regulations and
requirements of the Securities and Exchange Commission in respect thereof, and
to file the same with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done (with full power to each
of them to act alone), as fully and to all intents and purposes as I might or
could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents or any of them, or their substitutes, may lawfully
do or cause to be done by virtue hereof.
This Power of Attorney shall remain in full force and effect until revoked
by me in writing.
IN WITNESS WHEREOF, I hereto set my hand this 24th day of May, 2002.
/s/ Charles J. DiBona
---------------------
Charles J. DiBona
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that I, the undersigned, do hereby
constitute and appoint Susan S. Keith, Margaret E. Carriere and Bruce A.
Metzinger, or any of them acting alone, my true and lawful attorneys-in-fact and
agents, with full power of substitution and resubstitution, to prepare and sign
for me, and in my name, place and stead, in any and all capacities, any and all
reports as may from time to time be required under Section 16(a) of the
Securities Exchange Act of 1934, as amended, and the rules, regulations and
requirements of the Securities and Exchange Commission in respect thereof, and
to file the same with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done (with full power to each
of them to act alone), as fully and to all intents and purposes as I might or
could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents or any of them, or their substitutes, may lawfully
do or cause to be done by virtue hereof.
This Power of Attorney shall remain in full force and effect until revoked
by me in writing.
IN WITNESS WHEREOF, I hereto set my hand this 2nd day of May, 2002.
/s/ Lawrence S. Eagleburger
---------------------------
Lawrence S. Eagleburger
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that I, the undersigned, do hereby
constitute and appoint Susan S. Keith, Margaret E. Carriere and Bruce A.
Metzinger, or any of them acting alone, my true and lawful attorneys-in-fact and
agents, with full power of substitution and resubstitution, to prepare and sign
for me, and in my name, place and stead, in any and all capacities, any and all
reports as may from time to time be required under Section 16(a) of the
Securities Exchange Act of 1934, as amended, and the rules, regulations and
requirements of the Securities and Exchange Commission in respect thereof, and
to file the same with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done (with full power to each
of them to act alone), as fully and to all intents and purposes as I might or
could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents or any of them, or their substitutes, may lawfully
do or cause to be done by virtue hereof.
This Power of Attorney shall remain in full force and effect until revoked
by me in writing.
IN WITNESS WHEREOF, I hereto set my hand this 23rd day of May, 2002.
/s/ W. R. Howell
----------------
W. R. Howell
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that I, the undersigned, do hereby
constitute and appoint Susan S. Keith, Margaret E. Carriere and Bruce A.
Metzinger, or any of them acting alone, my true and lawful attorneys-in-fact and
agents, with full power of substitution and resubstitution, to prepare and sign
for me, and in my name, place and stead, in any and all capacities, any and all
reports as may from time to time be required under Section 16(a) of the
Securities Exchange Act of 1934, as amended, and the rules, regulations and
requirements of the Securities and Exchange Commission in respect thereof, and
to file the same with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done (with full power to each
of them to act alone), as fully and to all intents and purposes as I might or
could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents or any of them, or their substitutes, may lawfully
do or cause to be done by virtue hereof.
This Power of Attorney shall remain in full force and effect until revoked
by me in writing.
IN WITNESS WHEREOF, I hereto set my hand this 28th day of May, 2002.
/s/ Ray L. Hunt
---------------
Ray L. Hunt
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that I, the undersigned, do hereby
constitute and appoint Susan S. Keith, Margaret E. Carriere and Bruce A.
Metzinger, or any of them acting alone, my true and lawful attorneys-in-fact and
agents, with full power of substitution and resubstitution, to prepare and sign
for me, and in my name, place and stead, in any and all capacities, any and all
reports as may from time to time be required under Section 16(a) of the
Securities Exchange Act of 1934, as amended, and the rules, regulations and
requirements of the Securities and Exchange Commission in respect thereof, and
to file the same with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done (with full power to each
of them to act alone), as fully and to all intents and purposes as I might or
could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents or any of them, or their substitutes, may lawfully
do or cause to be done by virtue hereof.
This Power of Attorney shall remain in full force and effect until revoked
by me in writing.
IN WITNESS WHEREOF, I hereto set my hand this 23rd day of May, 2002.
/s/ David J. Lesar
------------------
David J. Lesar
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that I, the undersigned, do hereby
constitute and appoint Susan S. Keith, Margaret E. Carriere and Bruce A.
Metzinger, or any of them acting alone, my true and lawful attorneys-in-fact and
agents, with full power of substitution and resubstitution, to prepare and sign
for me, and in my name, place and stead, in any and all capacities, any and all
reports as may from time to time be required under Section 16(a) of the
Securities Exchange Act of 1934, as amended, and the rules, regulations and
requirements of the Securities and Exchange Commission in respect thereof, and
to file the same with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done (with full power to each
of them to act alone), as fully and to all intents and purposes as I might or
could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents or any of them, or their substitutes, may lawfully
do or cause to be done by virtue hereof.
This Power of Attorney shall remain in full force and effect until revoked
by me in writing.
IN WITNESS WHEREOF, I hereto set my hand this 20th day of May, 2002.
/s/ Aylwin B. Lewis
-------------------
Aylwin B. Lewis
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that I, the undersigned, do hereby
constitute and appoint Susan S. Keith, Margaret E. Carriere and Bruce A.
Metzinger, or any of them acting alone, my true and lawful attorneys-in-fact and
agents, with full power of substitution and resubstitution, to prepare and sign
for me, and in my name, place and stead, in any and all capacities, any and all
reports as may from time to time be required under Section 16(a) of the
Securities Exchange Act of 1934, as amended, and the rules, regulations and
requirements of the Securities and Exchange Commission in respect thereof, and
to file the same with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done (with full power to each
of them to act alone), as fully and to all intents and purposes as I might or
could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents or any of them, or their substitutes, may lawfully
do or cause to be done by virtue hereof.
This Power of Attorney shall remain in full force and effect until revoked
by me in writing.
IN WITNESS WHEREOF, I hereto set my hand this 21st day of May, 2002.
/s/ J. Landis Martin
--------------------
J. Landis Martin
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that I, the undersigned, do hereby
constitute and appoint Susan S. Keith, Margaret E. Carriere and Bruce A.
Metzinger, or any of them acting alone, my true and lawful attorneys-in-fact and
agents, with full power of substitution and resubstitution, to prepare and sign
for me, and in my name, place and stead, in any and all capacities, any and all
reports as may from time to time be required under Section 16(a) of the
Securities Exchange Act of 1934, as amended, and the rules, regulations and
requirements of the Securities and Exchange Commission in respect thereof, and
to file the same with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done (with full power to each
of them to act alone), as fully and to all intents and purposes as I might or
could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents or any of them, or their substitutes, may lawfully
do or cause to be done by virtue hereof.
This Power of Attorney shall remain in full force and effect until revoked
by me in writing.
IN WITNESS WHEREOF, I hereto set my hand this 22nd day of May, 2002.
/s/ Jay A. Precourt
-------------------
Jay A. Precourt
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that I, the undersigned, do hereby
constitute and appoint Susan S. Keith, Margaret E. Carriere and Bruce A.
Metzinger, or any of them acting alone, my true and lawful attorneys-in-fact and
agents, with full power of substitution and resubstitution, to prepare and sign
for me, and in my name, place and stead, in any and all capacities, any and all
reports as may from time to time be required under Section 16(a) of the
Securities Exchange Act of 1934, as amended, and the rules, regulations and
requirements of the Securities and Exchange Commission in respect thereof, and
to file the same with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done (with full power to each
of them to act alone), as fully and to all intents and purposes as I might or
could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents or any of them, or their substitutes, may lawfully
do or cause to be done by virtue hereof.
This Power of Attorney shall remain in full force and effect until revoked
by me in writing.
IN WITNESS WHEREOF, I hereto set my hand this 28th day of May, 2002.
/s/ Debra L. Reed
-----------------
Debra L. Reed
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that I, the undersigned, do hereby
constitute and appoint Susan S. Keith, Margaret E. Carriere and Bruce A.
Metzinger, or any of them acting alone, my true and lawful attorneys-in-fact and
agents, with full power of substitution and resubstitution, to prepare and sign
for me, and in my name, place and stead, in any and all capacities, any and all
reports as may from time to time be required under Section 16(a) of the
Securities Exchange Act of 1934, as amended, and the rules, regulations and
requirements of the Securities and Exchange Commission in respect thereof, and
to file the same with the Securities and Exchange Commission, granting unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done (with full power to each
of them to act alone), as fully and to all intents and purposes as I might or
could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents or any of them, or their substitutes, may lawfully
do or cause to be done by virtue hereof.
This Power of Attorney shall remain in full force and effect until revoked
by me in writing.
IN WITNESS WHEREOF, I hereto set my hand this 22nd day of May, 2002.
/s/ C. J. Silas
---------------
C. J. Silas