Schlumberger SLB was founded in 1926 in Paris as the Electric Prospecting Company (French: Société de prospection électrique). It was founded by two brothers Conrad and Marcel Schlumberger from Alsace. Schlumberger supplies the petroleum industry with services such as seismic data processing, formation evaluation, well testing and directional drilling. It also provides well cementing and stimulation, artificial lift, well completions, flow assurance and consulting, and software and information management. The company works in the groundwater extraction and carbon capture and storage industries. Schlumberger NV, doing business as SLB, also known as Schlumberger Limited, is an oilfield services company. As of 2022, it is both the world’s largest offshore drilling company and the world’s largest offshore drilling contractor by revenue.