Schlumberger Limited, together with its subsidiaries, engages in the supply of technology, integrated project management, and information solutions to oil and gas exploration and production industries worldwide. It operates through three groups: Reservoir Characterization, Drilling, and Production. The Reservoir Characterization group provides reservoir imaging, monitoring, and development services; wireline technology that offers open-hole and cased-hole services; exploration and production pressure and flow-rate measurement services; information solutions, such as software, consulting, information management, and IT infrastructure services that support oil and gas industry; data interpretation and integration services; consulting services; and industry petrotechnical training solutions. The Drilling group designs, manufactures, and markets roller cone and fixed cutter drill bits, and drilling fluid systems; geo services; supplies engineering support, directional-drilling, measurement-while-drilling, and logging-while-drilling services; provides bottom hole assembly drilling tools, borehole enlargement technologies, impact tools, and tubulars and tubular services; and dynamic pressure management solutions. The Production group provides well services comprising pressure pumping, well cementing, stimulation, and intervention; well completion services and equipment, such as packers, safety valves, and sand control technology; artificial lift; coiled tubing equipment and services; slickline services for downhole mechanical well intervention, reservoir monitoring, and downhole data acquisition; subsea solutions; and geological storage solutions, including storage site characterization for carbon dioxide, as well as engages in the development, management, and environmental protection of water resources. Schlumberger Limited was founded in 1926 and is based in Houston, Texas.