David S. King

Enventure Global Technology LLC provides solid expandable tubular solutions for the energy industry. It offers drilling, completions, and intervention services. The company was founded in 1998 and is headquartered in Houston, TX.

Seventy Seven Energy, Inc. engages in the provision of upstream services, including drilling, pressure pumping, trucking, oilfield rental tools, rig relocation, and water transport and disposal. It operates through the following segments: Drilling, Hydraulic Fracturing, and Oilfield Rentals. The Drilling segment, through the Nomac Drilling, L.L.C., provides land drilling services for oil and natural gas exploration and production activities. The Hydraulic Fracturing segment, through the Performance Technologies, L.L.C., offers high-pressure hydraulic fracturing services and other well stimulation services. The Oilfield Rentals segment, through the Great Plains Oilfield Rental, L.L.C., supplies premium rental tools and specialized services for land-based oil and natural gas drilling, completion, and work over activities. The company was founded on September 9, 2011 and is headquartered in Oklahoma City, OK.

Archer Corp. provides interior construction services. It offers carpentry contracting services. The firm provides services for corporate, retails, institutional, healthcare, and residential projects. The company was founded in 1970 and is headquartered in Malden, MA.

Preferred Sands, Inc. provides sand-based proppant solutions. It operates through the sand and coated technology segments. The sand segment focuses on mining, processing, and distributing frac sand sold under supply agreements to oil and natural gas customers in connection with hydraulic fracturing of oil and natural gas wells. The company was founded by Michael O’Neill in 1992 and is headquartered in Radnor, PA.

Preferred Proppants LLC engages in the provision of innovative solutions to the oil and gas industry. The company was founded by Michael O'Neill in 1992 and is headquartered in Radnor, PA.

Sheridan Production Co. LLC operates as an oil and gas production company. The company was founded in 2006 and is headquartered in Houston, TX.