Barry B. Ekstrand

Eco-Stim Energy Solutions, Inc. is an oilfield services company, which engages in the provision of well stimulation, coiled tubing, and field management services to the upstream oil and gas industry. The company was founded in 2003 and is headquartered in Katy, TX.

CRS Proppants LLC provides raw and partially pre-cured resin coated sand to oilfield, exploration and production companies for use in hydraulic fracturing of oil and gas wells. Its products include CRS SP 30/50 and premium CRS PP 30/50. The company provides its products through an expansive logistics network, which consists of a fleet of several hundred rail cars and destination trainloads located in prominent oil and gas drilling basins. CRS Proppants was founded in 2010 and is headquartered in Houston, TX.

Weatherford International, Inc. manufactures drill pipes and oil field equipment. Its products include cavity pumps, reciprocating rod lift systems and gas lift, electric submersible pumps, and hydraulic lift systems. The company was founded in 1972 and is headquartered in Houston, TX.

Halliburton Energy Services, Inc. provides oilfield services. It offers technical products and services for petroleum, natural gas exploration and production. The company is headquartered in Houston, TX.