EXHIBIT 99.4




                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Nabors Industries Ltd. (the "Company")
on Form 10-K for the period ending December 31, 2002 as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), I,
Eugene M. Isenberg, Chairman and Chief Executive Officer of the Company,
certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section
906 of the Sarbanes-Oxley Act of 2002, that:

         (1) The Report fully complies with the requirements of section 13(a) or
15(d) of the Securities Exchange Act of 1934; and

         (2) The information contained in the Report fairly presents, in all
material respects, the financial condition and result of operations of the
Company.

Dated:  March 31, 2003


/s/ Eugene M. Isenberg
- ------------------------------------
Eugene M. Isenberg
Chairman and Chief Executive Officer


A signed original of this written statement required by Section 906 of the
Sarbanes-Oxley act of 2002 has been provided to Nabors Industries Ltd. and will
be retained by Nabors Industries Ltd. and will be furnished to the Securities
and Exchange Commission or its staff upon request.