Key Energy Services, Inc. operates as an onshore rig-based well servicing contractor in the United States and internationally. The company operates in U.S. and International segments. It offers rig-based services, including the completion of newly-drilled wells; workover and recompletion of existing oil and natural gas wells; well maintenance; plugging and abandonment of wells at the end of their lives; and specialty drilling services to oil and natural gas producers. The company also provides fluid management services, such as transportation and well-site storage services for various fluids utilized in connection with drilling, completions, workover, and maintenance activities; and disposal services for fluids produced subsequent to well completion, as well as operates a fleet of hot oilers capable of pumping heated fluids used to clear soluble restrictions in a wellbore. In addition, it offers coiled tubing services for wellbore clean-outs, nitrogen jet lifts, through-tubing fishing, and formation stimulations utilizing acid and chemical treatments. Further, the company provides fishing services comprising recovering lost or stuck equipment in the wellbore utilizing various fishing tools; well testing services; and rental equipment, such as drill pipes, tubulars, handling tools, pressure-control equipment, pumps, power swivels, reversing units, and foam air units, as well as frac stack equipment to support hydraulic fracturing operations and the associated flowback of frac fluids, proppants, oil, and natural gas. Additionally, the company offers hardware and software related to oilfield service equipment controls, data acquisition, and digital information flow; and drilling, wire line and project management, consulting, and reservoir engineering services. 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.