<PAGE>   1


EXHIBIT 24.1

                                POWER OF ATTORNEY



                  WHEREAS, HYDRIL COMPANY, a Delaware corporation (the
"Company"), intends to file with the Securities and Exchange Commission (the
"Commission") under the Securities Exchange Act of 1934, as amended (the "Act"),
an Annual Report on Form 10-K for the fiscal year ended December 31, 2000, as
prescribed by the Commission pursuant to the Act and the rules and regulations
of the Commission promulgated thereunder, with such amendments, supplements or
appendices thereto as may be necessary or appropriate, together with any and all
exhibits and other documents having relation to said Annual Report;

                  NOW, THEREFORE, the undersigned in his capacity as a director
or officer, or both, as the case may be, of the Company, does hereby appoint
CHRISTOPHER T. SEAVER and MICHAEL C. KEARNEY, and each of them severally, as his
true and lawful attorney or attorneys with power to act with or without the
other, and with full power of substitution and resubstitution, to execute in his
name, place and stead, in his capacity as a director or officer, or both, as the
case may be, of the Company, said Annual Report and any and all amendments,
supplements or appendices thereto and all instruments necessary or incidental in
connection therewith as said attorneys or either of them shall deem necessary or
incidental in connection therewith and to file the same or cause the same to be
filed with the Commission. Each of said attorneys shall have full power and
authority to do and perform in the name and on behalf of the undersigned in any
and all capacities, every act whatsoever necessary or desirable to be done to
the premises, as fully and to all intents and purposes as the undersigned might
or could do in person, the undersigned hereby ratifying and approving the acts
of said attorneys and each of them.

                  IN WITNESS WHEREOF, the undersigned has executed this
instrument on this 20th day of March, 2001.


                                           /s/ Kenneth S. McCormick
                                           ------------------------------
                                           Kenneth S. McCormick


<PAGE>   2


                                POWER OF ATTORNEY



                  WHEREAS, HYDRIL COMPANY, a Delaware corporation (the
"Company"), intends to file with the Securities and Exchange Commission (the
"Commission") under the Securities Exchange Act of 1934, as amended (the "Act"),
an Annual Report on Form 10-K for the fiscal year ended December 31, 2000, as
prescribed by the Commission pursuant to the Act and the rules and regulations
of the Commission promulgated thereunder, with such amendments, supplements or
appendices thereto as may be necessary or appropriate, together with any and all
exhibits and other documents having relation to said Annual Report;

                  NOW, THEREFORE, the undersigned in his capacity as a director
or officer, or both, as the case may be, of the Company, does hereby appoint
CHRISTOPHER T. SEAVER and MICHAEL C. KEARNEY, and each of them severally, as his
true and lawful attorney or attorneys with power to act with or without the
other, and with full power of substitution and resubstitution, to execute in his
name, place and stead, in his capacity as a director or officer, or both, as the
case may be, of the Company, said Annual Report and any and all amendments,
supplements or appendices thereto and all instruments necessary or incidental in
connection therewith as said attorneys or either of them shall deem necessary or
incidental in connection therewith and to file the same or cause the same to be
filed with the Commission. Each of said attorneys shall have full power and
authority to do and perform in the name and on behalf of the undersigned in any
and all capacities, every act whatsoever necessary or desirable to be done to
the premises, as fully and to all intents and purposes as the undersigned might
or could do in person, the undersigned hereby ratifying and approving the acts
of said attorneys and each of them.

                  IN WITNESS WHEREOF, the undersigned has executed this
instrument on this 20th day of March, 2001.



                                                /s/ Richard C. Seaver
                                                -------------------------
                                                Richard C. Seaver




<PAGE>   3


                                POWER OF ATTORNEY



                  WHEREAS, HYDRIL COMPANY, a Delaware corporation (the
"Company"), intends to file with the Securities and Exchange Commission (the
"Commission") under the Securities Exchange Act of 1934, as amended (the "Act"),
an Annual Report on Form 10-K for the fiscal year ended December 31, 2000, as
prescribed by the Commission pursuant to the Act and the rules and regulations
of the Commission promulgated thereunder, with such amendments, supplements or
appendices thereto as may be necessary or appropriate, together with any and all
exhibits and other documents having relation to said Annual Report;

                  NOW, THEREFORE, the undersigned in his capacity as a director
or officer, or both, as the case may be, of the Company, does hereby appoint
CHRISTOPHER T. SEAVER and MICHAEL C. KEARNEY, and each of them severally, as his
true and lawful attorney or attorneys with power to act with or without the
other, and with full power of substitution and resubstitution, to execute in his
name, place and stead, in his capacity as a director or officer, or both, as the
case may be, of the Company, said Annual Report and any and all amendments,
supplements or appendices thereto and all instruments necessary or incidental in
connection therewith as said attorneys or either of them shall deem necessary or
incidental in connection therewith and to file the same or cause the same to be
filed with the Commission. Each of said attorneys shall have full power and
authority to do and perform in the name and on behalf of the undersigned in any
and all capacities, every act whatsoever necessary or desirable to be done to
the premises, as fully and to all intents and purposes as the undersigned might
or could do in person, the undersigned hereby ratifying and approving the acts
of said attorneys and each of them.

                  IN WITNESS WHEREOF, the undersigned has executed this
instrument on this 20th day of March, 2001.



                                               /s/ Richard A. Archer
                                               ----------------------------
                                               Richard A. Archer




<PAGE>   4


                                POWER OF ATTORNEY



                  WHEREAS, HYDRIL COMPANY, a Delaware corporation (the
"Company"), intends to file with the Securities and Exchange Commission (the
"Commission") under the Securities Exchange Act of 1934, as amended (the "Act"),
an Annual Report on Form 10-K for the fiscal year ended December 31, 2000, as
prescribed by the Commission pursuant to the Act and the rules and regulations
of the Commission promulgated thereunder, with such amendments, supplements or
appendices thereto as may be necessary or appropriate, together with any and all
exhibits and other documents having relation to said Annual Report;

                  NOW, THEREFORE, the undersigned in his capacity as a director
or officer, or both, as the case may be, of the Company, does hereby appoint
CHRISTOPHER T. SEAVER and MICHAEL C. KEARNEY, and each of them severally, as his
true and lawful attorney or attorneys with power to act with or without the
other, and with full power of substitution and resubstitution, to execute in his
name, place and stead, in his capacity as a director or officer, or both, as the
case may be, of the Company, said Annual Report and any and all amendments,
supplements or appendices thereto and all instruments necessary or incidental in
connection therewith as said attorneys or either of them shall deem necessary or
incidental in connection therewith and to file the same or cause the same to be
filed with the Commission. Each of said attorneys shall have full power and
authority to do and perform in the name and on behalf of the undersigned in any
and all capacities, every act whatsoever necessary or desirable to be done to
the premises, as fully and to all intents and purposes as the undersigned might
or could do in person, the undersigned hereby ratifying and approving the acts
of said attorneys and each of them.

                  IN WITNESS WHEREOF, the undersigned has executed this
instrument on this 20th day of March, 2001.



                                                 /s/ Jerry S. Cox
                                                 -------------------------
                                                 Jerry S. Cox




<PAGE>   5


                                POWER OF ATTORNEY



                  WHEREAS, HYDRIL COMPANY, a Delaware corporation (the
"Company"), intends to file with the Securities and Exchange Commission (the
"Commission") under the Securities Exchange Act of 1934, as amended (the "Act"),
an Annual Report on Form 10-K for the fiscal year ended December 31, 2000, as
prescribed by the Commission pursuant to the Act and the rules and regulations
of the Commission promulgated thereunder, with such amendments, supplements or
appendices thereto as may be necessary or appropriate, together with any and all
exhibits and other documents having relation to said Annual Report;

                  NOW, THEREFORE, the undersigned in his capacity as a director
or officer, or both, as the case may be, of the Company, does hereby appoint
CHRISTOPHER T. SEAVER and MICHAEL C. KEARNEY, and each of them severally, as his
true and lawful attorney or attorneys with power to act with or without the
other, and with full power of substitution and resubstitution, to execute in his
name, place and stead, in his capacity as a director or officer, or both, as the
case may be, of the Company, said Annual Report and any and all amendments,
supplements or appendices thereto and all instruments necessary or incidental in
connection therewith as said attorneys or either of them shall deem necessary or
incidental in connection therewith and to file the same or cause the same to be
filed with the Commission. Each of said attorneys shall have full power and
authority to do and perform in the name and on behalf of the undersigned in any
and all capacities, every act whatsoever necessary or desirable to be done to
the premises, as fully and to all intents and purposes as the undersigned might
or could do in person, the undersigned hereby ratifying and approving the acts
of said attorneys and each of them.

                  IN WITNESS WHEREOF, the undersigned has executed this
instrument on this 20th day of March, 2001.



                                                  /s/ Gordon B. Crary, Jr.
                                                  ------------------------
                                                  Gordon B. Crary, Jr.




<PAGE>   6


                                POWER OF ATTORNEY



                  WHEREAS, HYDRIL COMPANY, a Delaware corporation (the
"Company"), intends to file with the Securities and Exchange Commission (the
"Commission") under the Securities Exchange Act of 1934, as amended (the "Act"),
an Annual Report on Form 10-K for the fiscal year ended December 31, 2000, as
prescribed by the Commission pursuant to the Act and the rules and regulations
of the Commission promulgated thereunder, with such amendments, supplements or
appendices thereto as may be necessary or appropriate, together with any and all
exhibits and other documents having relation to said Annual Report;

                  NOW, THEREFORE, the undersigned in his capacity as a director
or officer, or both, as the case may be, of the Company, does hereby appoint
CHRISTOPHER T. SEAVER and MICHAEL C. KEARNEY, and each of them severally, as his
true and lawful attorney or attorneys with power to act with or without the
other, and with full power of substitution and resubstitution, to execute in his
name, place and stead, in his capacity as a director or officer, or both, as the
case may be, of the Company, said Annual Report and any and all amendments,
supplements or appendices thereto and all instruments necessary or incidental in
connection therewith as said attorneys or either of them shall deem necessary or
incidental in connection therewith and to file the same or cause the same to be
filed with the Commission. Each of said attorneys shall have full power and
authority to do and perform in the name and on behalf of the undersigned in any
and all capacities, every act whatsoever necessary or desirable to be done to
the premises, as fully and to all intents and purposes as the undersigned might
or could do in person, the undersigned hereby ratifying and approving the acts
of said attorneys and each of them.

                  IN WITNESS WHEREOF, the undersigned has executed this
instrument on this 20th day of March, 2001.



                                                   /s/ Patrick T. Seaver
                                                   ------------------------
                                                   Patrick T. Seaver




<PAGE>   7


                                POWER OF ATTORNEY



                  WHEREAS, HYDRIL COMPANY, a Delaware corporation (the
"Company"), intends to file with the Securities and Exchange Commission (the
"Commission") under the Securities Exchange Act of 1934, as amended (the "Act"),
an Annual Report on Form 10-K for the fiscal year ended December 31, 2000, as
prescribed by the Commission pursuant to the Act and the rules and regulations
of the Commission promulgated thereunder, with such amendments, supplements or
appendices thereto as may be necessary or appropriate, together with any and all
exhibits and other documents having relation to said Annual Report;

                  NOW, THEREFORE, the undersigned in his capacity as a director
or officer, or both, as the case may be, of the Company, does hereby appoint
CHRISTOPHER T. SEAVER and MICHAEL C. KEARNEY, and each of them severally, as his
true and lawful attorney or attorneys with power to act with or without the
other, and with full power of substitution and resubstitution, to execute in his
name, place and stead, in his capacity as a director or officer, or both, as the
case may be, of the Company, said Annual Report and any and all amendments,
supplements or appendices thereto and all instruments necessary or incidental in
connection therewith as said attorneys or either of them shall deem necessary or
incidental in connection therewith and to file the same or cause the same to be
filed with the Commission. Each of said attorneys shall have full power and
authority to do and perform in the name and on behalf of the undersigned in any
and all capacities, every act whatsoever necessary or desirable to be done to
the premises, as fully and to all intents and purposes as the undersigned might
or could do in person, the undersigned hereby ratifying and approving the acts
of said attorneys and each of them.

                  IN WITNESS WHEREOF, the undersigned has executed this
instrument on this 20th day of March, 2001.



                                                 /s/ T. Don Stacy
                                                 ---------------------------
                                                 T. Don Stacy




<PAGE>   8


                                POWER OF ATTORNEY



                  WHEREAS, HYDRIL COMPANY, a Delaware corporation (the
"Company"), intends to file with the Securities and Exchange Commission (the
"Commission") under the Securities Exchange Act of 1934, as amended (the "Act"),
an Annual Report on Form 10-K for the fiscal year ended December 31, 2000, as
prescribed by the Commission pursuant to the Act and the rules and regulations
of the Commission promulgated thereunder, with such amendments, supplements or
appendices thereto as may be necessary or appropriate, together with any and all
exhibits and other documents having relation to said Annual Report;

                  NOW, THEREFORE, the undersigned in his capacity as a director
or officer, or both, as the case may be, of the Company, does hereby appoint
CHRISTOPHER T. SEAVER and MICHAEL C. KEARNEY, and each of them severally, as his
true and lawful attorney or attorneys with power to act with or without the
other, and with full power of substitution and resubstitution, to execute in his
name, place and stead, in his capacity as a director or officer, or both, as the
case may be, of the Company, said Annual Report and any and all amendments,
supplements or appendices thereto and all instruments necessary or incidental in
connection therewith as said attorneys or either of them shall deem necessary or
incidental in connection therewith and to file the same or cause the same to be
filed with the Commission. Each of said attorneys shall have full power and
authority to do and perform in the name and on behalf of the undersigned in any
and all capacities, every act whatsoever necessary or desirable to be done to
the premises, as fully and to all intents and purposes as the undersigned might
or could do in person, the undersigned hereby ratifying and approving the acts
of said attorneys and each of them.

                  IN WITNESS WHEREOF, the undersigned has executed this
instrument on this 20th day of March, 2001.



                                                 /s/ Lew O. Ward
                                                 ------------------------
                                                 Lew O. Ward


<PAGE>   9


                                POWER OF ATTORNEY



                  WHEREAS, HYDRIL COMPANY, a Delaware corporation (the
"Company"), intends to file with the Securities and Exchange Commission (the
"Commission") under the Securities Exchange Act of 1934, as amended (the "Act"),
an Annual Report on Form 10-K for the fiscal year ended December 31, 2000, as
prescribed by the Commission pursuant to the Act and the rules and regulations
of the Commission promulgated thereunder, with such amendments, supplements or
appendices thereto as may be necessary or appropriate, together with any and all
exhibits and other documents having relation to said Annual Report;

                  NOW, THEREFORE, the undersigned, in his capacity as an officer
of the Company, does hereby appoint CHRISTOPHER T. SEAVER as his true and lawful
attorney, with full power of substitution and resubstitution, to execute in his
name, place and stead, in his capacity as an officer of the Company, said Annual
Report and any and all amendments, supplements or appendices thereto and all
instruments necessary or incidental in connection therewith as said attorney
shall deem necessary or incidental in connection therewith and to file the same
or cause the same to be filed with the Commission. Said attorney shall have full
power and authority to do and perform in the name and on behalf of the
undersigned in any and all capacities, every act whatsoever necessary or
desirable to be done to the premises, as fully and to all intents and purposes
as the undersigned might or could do in person, the undersigned hereby ratifying
and approving the acts of said attorney.

                  IN WITNESS WHEREOF, the undersigned has executed this
instrument on this 20th day of March, 2001.



                                             /s/ Michael C. Kearney
                                             -----------------------------
                                             Michael C. Kearney


<PAGE>   10


                                POWER OF ATTORNEY



                  WHEREAS, HYDRIL COMPANY, a Delaware corporation (the
"Company"), intends to file with the Securities and Exchange Commission (the
"Commission") under the Securities Exchange Act of 1934, as amended (the "Act"),
an Annual Report on Form 10-K for the fiscal year ended December 31, 2000, as
prescribed by the Commission pursuant to the Act and the rules and regulations
of the Commission promulgated thereunder, with such amendments, supplements or
appendices thereto as may be necessary or appropriate, together with any and all
exhibits and other documents having relation to said Annual Report;

                  NOW, THEREFORE, the undersigned in his capacity as a director
and officer of the Company, does hereby appoint MICHAEL C. KEARNEY as his true
and lawful attorney, with full power of substitution and resubstitution, to
execute in his name, place and stead, in his capacity as a director and officer
of the Company, said Annual Report and any and all amendments, supplements or
appendices thereto and all instruments necessary or incidental in connection
therewith as said attorney shall deem necessary or incidental in connection
therewith and to file the same or cause the same to be filed with the
Commission. Said attorney shall have full power and authority to do and perform
in the name and on behalf of the undersigned in any and all capacities, every
act whatsoever necessary or desirable to be done to the premises, as fully and
to all intents and purposes as the undersigned might or could do in person, the
undersigned hereby ratifying and approving the acts of said attorney.

                  IN WITNESS WHEREOF, the undersigned has executed this
instrument on this 20th day of March, 2001.



                                             /s/ Christopher T. Seaver
                                             --------------------------
                                             Christopher T. Seaver