Schlumberger Announces Subsea Control Reliability Milestone

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Accelerated Life Testing Demonstrates Long-Term System Survivability
PARIS, November 20, 2009 – Schlumberger announced today that its subsea electronic control module has passed the historical milestone of more than a quarter million operational hours in the field with 100% reliability.

More than 30 modules have been deployed successfully for the control and monitoring of flow boosting pumps and subsea well production. As a power and networking module, its expanded applications include intelligent well control and operation.

Schlumberger subsea control and monitoring technology is an enabler for surveillance in the subsurface and subsea domain delivering an unprecedented level of reliability that is critical to the subsea industry with its high intervention costs.

“Subsea control systems must have reliability as a primary function due to costs involved in remediation following a failure. The reliability of the Schlumberger solution is embedded in subsea applications commercially available today, as well as those under development,” said Andy Hendricks, vice president, Schlumberger Subsea. “Our subsea light vessel intervention control system also uses this technology as part of its safety system to control subsea trees and the intervention package.”

This high-bandwidth communication subsea control module has been developed using design and engineering processes created specifically for the subsea environment. Long-term accelerated life-testing has demonstrated system survivability for more than 50 years and under conditions far beyond normal operating environments. The module will be used with upcoming subsea technology deployments around the world.

For more information on Schlumberger subsea, visit www.slb.com/subsea.

About Schlumberger
Schlumberger is the world’s leading supplier of technology, integrated project management and information solutions to customers working in the oil and gas industry worldwide. Employing approximately 77,000 people representing over 140 nationalities and working in more than 80 countries, Schlumberger provides the industry’s widest range of products and services from exploration through production.

Schlumberger Limited has principal offices in Paris, Houston and The Hague and reported revenues of $27.16 billion in 2008. For more information, visit www.SLB.com.

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For further information, contact:

Susan Ganz
Media Relations Manager
Schlumberger
+1 713 513 2480
sganz1@slb.com