Schlumberger Announces Second-Quarter 2007 Results Conference Call

Schlumberger Limited (NYSE:SLB) will hold a conference call on July 20, 2007 at 8:00am Central Time, 9:00am Eastern Time to discuss the results for the second quarter ending on June 30, 2007. The results are expected to be released at 5:00am Central Time, 6:00am Eastern Time that same morning.

To access the conference call, attendees should contact the Conference Call Operator at + 1-800-288-8961 within North America or +1-612-288-0337 outside of North America approximately 10 minutes prior to the call’s start time. Ask the operator for the “Schlumberger Earnings Conference Call.”

A replay of the conference call will be available until August 18, 2007, and can be accessed by dialing +1-800-475-6701 within North America or +1-320-365-3844 outside of North America, and giving the access code 875949.

A live webcast of the conference call will be broadcast simultaneously at www.SLB.com/irwebcast on a listen-only basis. Attendees should log in 15 minutes prior to the start of the call to test their browsers and register for the webcast. Following the event a replay will be available at the same URL.