Baker Hughes 10-K 2008 FY Annual report

Exhibit 23.1

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement Nos. 333-05987, 333-59941, 033-62887, 333-69306, 333-123232 on Forms S-8 of our reports dated March 9, 2009, relating to the financial statements (which report expresses an unqualified opinion and includes an explanatory paragraph relating to the adoption of Financial Accounting Standards Board Interpretation No. 48,Accounting for Uncertainty in Income Taxes — an Interpretation of FASB Statement No. 109in 2007) and financial statement schedule of Michael Baker Corporation, and the effectiveness of internal control over financial reporting, appearing in this Annual Report on Form 10-K of the Company for the year ended December 31, 2008.

/s/ Deloitte & Touche LLP  

Pittsburgh, Pennsylvania
March 9, 2009