Schlumberger Limited supplies technology for reservoir characterization, drilling, production, and processing to the oil and gas industry worldwide. It operates in four divisions: Digital & Integration, Reservoir Performance, Well Construction, and Production Systems. The company offers reservoir interpretation and data processing services; open and cased-hole, and slickline services; exploration and production pressure and flow-rate measurement services; tubing-conveyed perforating services; integrated production systems; software, consulting, information management, and IT infrastructure services; reservoir characterization, field development planning, and production enhancement consulting services; and petro technical data services and training solutions. It designs, manufactures, and markets roller cone and fixed cutter drill bits; supplies drilling fluid systems, fluid systems and specialty equipment, production technology solutions, and engineered managed pressure and underbalanced drilling solutions; and offers environmental services and products; provides drilling and measurement, land drilling rigs, and related support services; and supplies well planning and drilling, engineering, supervision, logistics, procurement, and contracting services, as well as drilling rig management services. In addition, the company offers well services; coiled tubing equipment; hydraulic fracturing, multistage completions, perforating, coiled tubing equipment, and services; well completion services and equipment; artificial lift production equipment and optimization services; and production management services. Further, it provides integrated subsea production systems; drilling equipment and services; onshore and offshore platform wellhead systems and processing solutions; and valve and process systems. The company was formerly known as Socie´te´ de Prospection E´lectrique. Schlumberger Limited was founded in 1926 and is based in Houston, Texas.