Schlumberger Limited (NYSE:_SLB) is the world's largest oilfield services company. Schlumberger employs over 113,000 people of more than 140 nationalities working in approximately 85 countries. Its principal offices are in Houston, Paris, and the Hague. Schlumberger was founded in 1926 by French brothers Conrad and Marcel Schlumberger as the Societe de prospection electrique (French: Electric Prospecting Company). The company recorded the first-ever electrical resistivity well log in Merkwiller-Pechelbronn, France in 1927. Today Schlumberger supplies the petroleum industry with services such as seismic acquisition and processing, formation evaluation, well testing and directional drilling, well cementing and stimulation, artificial lift, well completions and consulting, and software and information management. The company is also involved in the groundwater extraction and carbon capture and storage industries.
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