Calgren Renewable Fuels

Halliburton Energy Services is a subsidiary of Halliburton, which was founded in 1919 and is one of the world's largest providers of products and services to the energy industry. With more than 55,000 employees in over 70 countries, the company serves the oil and gas industry. It assists with locating hydrocarbons, managing geological data, drilling and well construction. The company s completion and production segment provides pressure pumping, sand control and well intervention services. Halliburton Energy Services also offers several tools used in the drilling of oil and gas wells. The company provides open-hole wire line services that provide information on resistivity, porosity, density, rock mechanics and fluid sampling. It offers project management solutions to independent, integrated and national oil companies. Halliburton operates a subsidiary, WellDynamics, which is one of the world's leading providers of intelligent completion technologies.

Established in 1977, Aera Energy is one of largest oil and gas producers in San Joaquin Valley in California. The company produces more than160,000 barrels of oil and over 50 million cubic feet natural gas per day. It has a staff of nearly 1,100 people and is jointly owned by Shell and ExxonMobil.