Key Energy Services, Inc. operates as an onshore rig-based well servicing contractor. It operates through U.S. Rig Services, Fluid Management Services, Coiled Tubing Services, Fishing and Rental Services, and International segments. The U.S. Rig Services segment is involved in the completion of newly drilled wells; workover and recompletion of existing oil and natural gas wells; well maintenance; and plugging and abandonment of wells at the end of their lives, as well as provision of specialty drilling services to oil and natural gas producers. The Fluid Management Services segment offers transportation and well-site storage services for fluids utilized in drilling, completions, workover, and maintenance activities; and disposal services for fluids produced subsequent to well completion. It also operates a fleet of hot oilers used to clear soluble restrictions in a wellbore. The Coiled Tubing Services segment offers services for wellbore clean-outs, nitrogen jet lifts, through-tubing fishing, and formation stimulations; mills temporary isolation plugs that separate frac zones; and other pre- and post-hydraulic fracturing well preparation services. The Fishing and Rental Services segment provides fishing services, such as recovering lost or stuck equipment in the wellbore utilizing fishing tools, as well as well testing services; and rents drill pipes, tubulars, handling tools, pressure-control equipment, pumps, power swivels, reversing units, foam air units, and frac stack equipment used to support hydraulic fracturing operations and the associated flowback of frac fluids, proppants, oil, and natural gas. The International segment develops hardware and software related to oilfield service equipment controls, data acquisition, and digital information flow. The company was formerly known as Key Energy Group, Inc. and changed its name to Key Energy Services, Inc. in December 1998. Key Energy Services, Inc. was founded in 1977 and is headquartered in Houston, Texas.