Let say what Yahoo!Finance said about the company and the competitors.
Schlumberger Limited operates as an oilfield services company in the United States and internationally. The company operates in two segments, Oilfield Services and WesternGeco. The Oilfield Services segment provides technology, project management, and information solutions to the petroleum industry. Its technologies primarily include open-hole and cased-hole services; drilling and measurements; well testing and well services; completion services, including intelligent well completions; production optimization services using electrical submersible pumps and other artificial lift mechanisms; data and consulting services; and consulting, software, information management, and IT infrastructure services that support oil and gas industry core operational processes. This segment offers exploration and production services required during the life of an oil and gas reservoir. The WesternGeco segment provides reservoir imaging, monitoring, and development services, as well as operates seismic crews and data processing centers and multi-client seismic library. This segment's services range from 3D and time-lapse (4D) seismic surveys to multi-component surveys for delineating prospects and reservoir management. The company was founded in 1926 and is based in Houston, Texas.