Duane Zimmerman

Lime Rock Management LP (Lime Rock Management) is Private Equity firm founded in 1998 by Jonathan Clark Farber and John T. Reynolds. The firm is headquartered in Westport with additional office in London.

Lime Rock Partners LLC provides investment services in the exploration and production, energy service, and oil service technology sectors. The company was founded by Jonathan Clark Farber and John T. Reynolds in 1998 and is headquartered in Westport, CT.

EnerMech Ltd. engages in provision of mechanical engineering products and services. It offers industrial, process, pipeline, training, electrical and instrumentation, valve supply and manufacture, cranes and lifting, subsea umbilicals and cables, equipment rental and valve integrity management services. The firm serves the petrochemicals, LNG, offshore and onshore oil and gas, midstream, power, defence, renewables, infrastructure and mining markets. The company was founded by Doug Duguid on March 1, 2008 and is headquartered in Aberdeen, the United Kingdom.

TEC Well Service LLC provides workover and well servicing services. The firm operates through the following divisions: Ark-La-Tex, Permian, North Texas, and Niobrara. Its services include workover rigs, swabbing/braided line rigs, tank and vacuum trucks, and pressure pumping/kill truck. The company was founded by Ronald Shore in 1978 and is headquartered in Longview, TX.

Revelation Energy LLC provides coal mining services. The company was founded by Jeffery A. Hoops on February 11, 2009 and is headquartered in Milton, WV.

Expert Petroleum SRL engages in the exploration and production of oil and gas. It designs and finances field rehabilitation work programs to increase the field production and reserves. The company was founded by David Martinon and Michel Louboutin in 2005 and is headquartered in Bucharest, Romania.

OiLSERV Co. provides oilfield services. It offers wireline logging, cementing and stimulation, coiled tubing, surface and downhole testing, slickline, fluids solutions, and drilling services. The company was founded by Amjad Barzandji in 2006 and is headquartered in Erbil, Iraq.

Capstone Natural Resources II LLC provides oil and gas production services. Its primary interest is in the acquisition and enhancement of mature oil producing properties in the Permian Basin of West Texas and Eastern New Mexico through development drilling, down spacing and enhanced recovery. The company was founded on November 2, 2014 and is headquartered in Tulsa, OK.

SDI Gas LLC provides oilfield services. It operates through the following divisions: MEC and HDD. The MEC offers engineering, construction, and repair of natural gas compression stations. The HDD provides directional drilling of gas pipelines under obstructions. The company was founded in 2015 and is headquartered in Mt. Morris, PA.

Wayfinder Resources LLC provides oil and gas exploration and production services. The company was founded in 2017 and is headquartered in Houston, TX.

San Jacinto Minerals II LLC is an American company that engages in oil and gas field operations.

Axis Energy Services LLC provides energy services. Its services include completion, pressure, pumping, nitrogen, and chemical services. The company was founded in 2018 and is headquartered in Longview, TX.

The Children's Museum of Houston is an innovative learning center that focuses on child-centered education to inspire a lifelong passion for learning. The private company is based in Houston, TX. The museum offers 90,000 square feet of interactive and fun exhibits for children to explore.

Prairie Energy distributes electricity.