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CSI Compressco LP provides contract services for natural gas compression and treating in the United States, Latin America, Canada, Egypt, and internationally. The company offers natural gas compression services through low-, medium-, and high-horsepower compressor packages for oil and natural gas production, gathering, artificial lift, transmission, processing, and storage. It also provides treating services for natural gas producers and midstream companies, including providing equipment for lease or sale, equipment installation services, and the operation of equipment for removal of contaminants from a natural gas stream, and natural gas cooling to reduce the temperature of produced gas and liquids; well monitoring and sand separation services; and operation, maintenance, overhaul, and reconfiguration services for compression equipment. In addition, the company sells engine parts, compressor package parts, and other parts manufactured by third-party suppliers. The company was formerly known as Compressco Partners, L.P. and changed its name to CSI Compressco LP in December 2014. CSI Compressco LP was incorporated in 2008 and is headquartered in The Woodlands, Texas.

Cypress Environmental Partners, L.P. provides independent inspection, integrity, and support services in North America. The company operates in three segments: Inspection Services, Pipeline & Process Services (PPS), and Environmental Services. The Inspection Services segment offers inspection and integrity services on various infrastructure assets, including midstream pipelines, gathering systems, and distribution systems. This segment also provides various services, such as nondestructive examination, in-line inspection support, pig tracking, survey, data gathering, and supervision of third-party contractors. The PPS segment offers hydrostatic testing, chemical cleaning, water transfer and recycling, pumping, pigging, flushing, filling, dehydration, caliper runs, in-line inspection tool run support, nitrogen purging, and drying services, as well as test documentation and records retention services. The Environmental Services segment owns and operates 9 water treatment facilities with ten environmental protection agency class II injection wells in the Bakken shale region of the Williston Basin in North Dakota. This segment offers treatment, recovery, separation, and disposal of waste byproducts generated during the lifecycle of an oil and natural gas well to protect the environment and drinking water. The company serves owners and operators of pipelines and other infrastructure, public utility or local distribution, pipeline construction, oil and natural gas exploration and production, and trucking companies, as well as third-party purchasers of residual oil. Cypress Environmental Partners GP, LLC operates as the general partner of the company. The company was formerly known as Cypress Energy Partners, L.P. and changed its name to Cypress Environmental Partners, L.P. in March 2020. Cypress Environmental Partners, L.P. was founded in 2003 and is headquartered in Tulsa, Oklahoma.

NCS Multistage Holdings, Inc. provides engineered products and support services for oil and natural gas well completions and construction, and field development strategies in the United States, Canada, and internationally. It offers fracturing systems, which include casing-installed sliding sleeves, downhole frac isolation assemblies, and sand jet perforating products; enhanced recovery products, such as sliding sleeve, as well as Terrus system, an injection control device; repeat precision products comprising composite frac plugs and bridge plugs, single-use disposable setting tools, express systems, and related products; chemical and radioactive tracer diagnostics services; and well construction products, including AirLock casing buoyancy system, Vecturon and Vectraset liner hanger systems, and Toe initiation sleeves. It offers its products and services primarily to exploration and production companies for use in onshore wells through technically-trained sales force, and operating partners or sales representatives. The company was formerly known as Pioneer Super Holdings, Inc. and changed its name to NCS Multistage Holdings, Inc. in December 2016. NCS Multistage Holdings, Inc. was founded in 2006 and is headquartered in Houston, Texas.

Natural Gas Services Group, Inc. provides natural gas compression equipment and services to the energy industry in the United States. It engineers and fabricates, operates, rents, and maintains natural gas compressors for oil and natural gas production and plant facilities. It also designs, fabricates, and assembles compressor units for rental or sale; and designs, manufactures, and sells a line of reciprocating natural gas compressor frames, cylinders, and parts. In addition, the company offers flare stacks and related ignition and control devices for the onshore and offshore incineration of gas compounds, such as hydrogen sulfide, carbon dioxide, natural gas, and liquefied petroleum gases. Further, it provides aftermarket services for its compressor and flare sales business; and exchange and rebuild program for small horsepower screw compressors. It markets its products to exploration and production companies that utilize compressor units for artificial lift applications; and oil and natural gas exploration and production companies. Natural Gas Services Group, Inc. was incorporated in 1998 and is headquartered in Midland, Texas.

U.S. Well Services, Inc. operates as an oilfield service company in the United States. It provides pressure pumping services; and hydraulic fracturing services to the oil and natural gas exploration, and production companies. The company was founded in 2012 and is headquartered in Houston, Texas.