Schlumberger Limite is the world's largest oilfield services corporation operating in approximately 80 countries, with about 80,000 people of 140 nationalities. Schlumberger supplies a wide range of products and services from seismic acquisition and processing; formation evaluation; well testing and directional drilling to well cementing and stimulation; artificial lift and well completions; and consulting, software and information management. Schlumberger also provides similar products and services for the groundwater industry.