Schlumberger Ltd. engages in the provision of energy technology. The company is headquartered in Houston, Texas and currently employs 110,000 full-time employees. The company operates in four segments: Digital & Integration, Reservoir Performance, Well Construction, and Production Systems. The Digital & Integration segment combines its digital solutions and data products with its integrated offering of Asset Performance Solutions (APS). The Reservoir Performance segment consists of reservoir-centric technologies and services that are critical to optimizing reservoir productivity and performance. The Well Construction segment combines the full portfolio of products and services to optimize well placement and performance, maximize drilling efficiency, and improve wellbore assurance. The segment provides operators and drilling rig manufacturers with services and products related to designing and constructing a well. The Production Systems segment develops technologies and provides knowledge that enhances production and recovery from subsurface reservoirs to the surface, into pipelines, and to refineries.