EXHIBIT 32.1

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 on Form 10-K of Nabors Industries Ltd. (the “Company”) for the year ended December 31, 2011 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Anthony G. Petrello, Deputy Chairman, President and Chief Executive Officer of the Company, and I, R. Clark Wood , Principal Accounting and Financial Officer of the Company, each certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(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 results of operations of the Company.

/s/ Anthony G. Petrello

Anthony G. Petrello

Deputy Chairman, President and

Chief Executive Officer

Date:

/s/ R. Clark Wood

R. Clark Wood

Principal Accounting and

Financial Officer

Date: February 29, 2012