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Blueknight Energy Partners, L.P. provides integrated terminalling services for companies engaged in the production, distribution, and handling of liquid asphalt in the United States. As of March 1, 2022, it had 54 terminals located in 26 states. Blueknight Energy Partners G.P., L.L.C. operates as a general partner of Blueknight Energy Partners, L.P. The company was formerly known as SemGroup Energy Partners, L.P. and changed its name to Blueknight Energy Partners, L.P. in December 2009. Blueknight Energy Partners, L.P. was incorporated in 2007 and is headquartered in Tulsa, Oklahoma.

Nine Energy Service, Inc. operates as an onshore completion services provider that targets unconventional oil and gas resource development in North American basins and internationally. It offers cementing services, including blending high-grade cement and water with various solid and liquid additives to create a cement slurry that is pumped between the casing and the wellbore of the well. The company also provides open hole and cemented completion tool products, such as liner hangers and accessories, fracture isolation packers, frac sleeves, stage one prep tools, casing flotation tools, specialty open hole float equipment, disk subs, composite cement retainers, and centralizers that provide pinpoint frac sleeve system technologies. In addition, it offers wireline services consisting of plug-and-perf completions, which is a multistage well completion technique for cased-hole wells that consists of deploying perforating guns and isolation tools to a specified depth; and coiled tubing services, which perform wellbore intervention operations utilizing a continuous steel pipe that is transported to the wellsite wound on a large spool. The company was formerly known as NSC-Tripoint, Inc. and changed its name to Nine Energy Service, Inc. in October 2011. Nine Energy Service, Inc. was incorporated in 2011 and is headquartered in Houston, Texas.

OPAL Fuels Inc., together with its subsidiaries, engages in the production and distribution of renewable natural gas for use as a vehicle fuel for heavy and medium-duty trucking fleets. It also designs, develops, constructs, operates, and services fueling stations for trucking fleets that use natural gas to displace diesel as transportation fuel. In addition, it offers design, development, and construction services for hydrogen fueling stations. Further, the company engages in the generation and sale of renewable power to utilities. OPAL Fuels Inc. is based in White Plains, New York.