Exhibit 23
Consent of Independent Registered Public Accounting Firm
We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-36364;
333-67330; 333-115277; 333-124534; and 333-151920), and on Form S-4 (Nos. 333-97899 and 333-166326, as amended by
post-effective amendment on Form S-8) of Schlumberger Limited of our report dated February 4, 2011 relating to the
consolidated financial statements and the effectiveness of internal control over financial reporting, which appears in
this Form 10-K.
/s/ P
RICEWATERHOUSE
C
OOPERS
LLP
PricewaterhouseCoopers LLP
Houston, Texas
February 4, 2011
