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Basic Energy Services, Inc. engages in the provision of well site services to oil and natural gas drilling and producing companies. It operates its business through the following segments: Completion and Remedial Services, Well Servicing, Water Logistics, and Corporate and Other. The Completion and Remedial Services segment utilizes coiled tubing services, air compressor packages specially configured for underbalanced drilling operations, an array of specialized rental equipment and fishing tools, thru-tubing, and snubbing units. The Well Servicing segment encompasses a full range of services performed with a mobile well servicing rig, including the installation and removal of downhole equipment and elimination of obstructions in the well bore to facilitate the flow of oil and natural gas. The Water Logistics segment focuses in the fleet of trucks and related assets, including specialized tank trucks, storage tanks, water wells, disposal facilities water treatment, and related equipment. The Corporate and Other segment comprises principally of working capital and debt financing costs. The company was founded in 1992 and is headquartered in Fort Worth, TX.

ERHC Energy Inc. engages in the exploration and exploitation of oil and gas resources in Africa. Its principal assets include the rights to working interests in exploration acreage in the Republic of Kenya; the Republic of Chad; the Joint Development Zone between the Democratic Republic of Sao Tome and Principe; the Federal Republic of Nigeria; and the economic zone of Sao Tome. The company was founded in 1986 and is based in Houston, Texas.

Key Energy Services, Inc. operates as an onshore rig-based well servicing contractor in the United States. It operates through Rig Services, Fishing and Rental Services, Coiled Tubing Services, and Fluid Management Services segments. The Rig Services segment is involved in the completion of newly drilled wells; workover and recompletion of existing oil and natural gas wells; well maintenance activities; and plugging and abandonment of wells at the end of their useful lives, as well as provision of specialty drilling services to oil and natural gas producers. The Fishing and Rental Services segment provides fishing services that involve recovering lost or stuck equipment in the wellbore utilizing fishing tools; and rents drill pipes, tubulars, handling tools, pressure-control equipment, pumps, power swivels, reversing units, and foam air units. 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 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 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 based in Houston, Texas.

Quintana Energy Services Inc. provides oilfield services to onshore oil and natural gas exploration and production companies operating in conventional and unconventional plays in the United States. The company operates through four segments: Directional Drilling, Pressure Pumping, Pressure Control, and Wireline. The Directional Drilling segment provides directional, horizontal, under balanced, and measurement-while-drilling services, as well as rental tools and support services. The Pressure Pumping segment provides hydraulic fracturing stimulation services, cementing, and acidizing services for the completion, production, and maintenance of oil and gas wells. As of December 31, 2018, this segment had a pressure pumping fleet of 267,500 hydraulic horsepower. The Pressure Control segment offers coiled tubing, rig-assisted snubbing, fluid pumping, nitrogen, well control, and other pressure control related services to support completion and workover operations. This segment had a fleet of 24 coiled tubing, 36 rig-assisted snubbing, and 24 nitrogen pumping units. The Wireline segment offers pump-down services for setting plugs between hydraulic fracturing stages, as well as the deployment of perforation equipment in connection with plug-and-perf operations. This segment also provides cased-hole production logging, injection profiling, stimulation performance evaluation, and water break-through identification services; and industrial logging services for cavern, storage, and injection wells. It owned 41 wireline units. Quintana Energy Services Inc. was founded in 2017 and is headquartered in Houston, Texas.

Recon Technology, Ltd. provides hardware, software, and on-site services to companies in the petroleum mining and extraction industry in the People's Republic of China. The company offers equipment, tools, and other components and parts related to oilfield production and other energy industries; and develops and sells industrial automation control and information solutions. It also provides equipment for oil and gas production and transportation, including heating furnaces and burner, as well as improvement techniques comprising packers of fracturing; production packers; sand prevention in oil and water wells; water locating and plugging techniques; fissure shaper; fracture acidizing techniques; and electronic broken-down services to resolve block-up and freezing problems. In addition, the company offers automation systems and services, including pumping unit controller that monitors the pumping units and collects data; RTU to monitor natural gas wells and collect gas well pressure data; wireless dynamometers and wireless pressure gauges; electric multi-way valves for oilfield metering station flow control; and natural gas flow computer systems. Further, it provides Recon SCADA oilfield monitor and data acquisition system for supervision and data collection; EPC service of pipeline SCADA system for pipeline monitoring and data acquisition; EPC service of oil and gas wells SCADA system for monitoring and data acquisition of oil wells and natural gas wells; EPC service of oilfield video surveillance and control system to control the oil and gas wellhead and measurement station areas; and technique service for digital oilfield transformation. Additionally, the company offers oilfield waste water treatment solutions and related chemicals; oily sludge disposal solutions; and gas station operation and management solution. Recon Technology, Ltd. was incorporated in 2007 and is headquartered in Beijing, the People's Republic of China.