Schlumberger 2010 Annual Report - page 24

Information about acquisitions made by Schlumberger appears in Note 4 of the
Consolidated Financial Statements
While Schlumberger seeks and holds numerous patents covering various products and processes, no particular patent
or group of patents is considered material to Schlumberger’s business.
Although weather and natural phenomena can temporarily affect delivery of oilfield services, the widespread
geographic location of such services precludes the overall business from being characterized as seasonal.
Customers and Backlog of Orders
For the year ended December 31, 2010, no single customer exceeded 10% of consolidated revenue. Other than
WesternGeco, we have no significant backlog due to the nature of our businesses. The WesternGeco backlog, which is
based on signed contracts with customers, was $0.9 billion at December 31, 2010 ($1.0 billion at December 31, 2009).
As of December 31, 2010, Schlumberger had approximately 108,000 employees.
Financial Information
Financial information by business segment for the years ended December 31, 2010, 2009 and 2008 is provided in
Note 17 of the
Consolidated Financial Statements
Available Information
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Secretary, Schlumberger Limited, 5599 San Felipe, 17th Floor, Houston, Texas 77056, USA.
Schlumberger has filed the required certifications under Section 302 of the Sarbanes-Oxley Act of 2002 as
Exhibits 31.1 and 31.2 to this Form 10-K.
The information on our website or any other website is not incorporated by reference in this Report and should not be
considered part of this Report or any other filing Schlumberger makes with the SEC.
Part I, Item 1
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