Double T Industries Inc

Established in 1944, Palmer Mfg. & Tank Inc. is one of the leading manufactures of fiberglass tanks and steel tanks in the United States. Based in Garden City, Kan., the company specializes in manufacturing containment tanks, double-walled tanks, elevated-bottom tanks, heated tanks, insulated tanks, mixing tanks, oilfield tanks and underground tanks. It also offers a wide selection of resins, optional lining reinforcements and three different manufacturing processes. Its specialty items for fiberglass and steel tanks are used for anchoring, appurtenances, level indication, baffles, mixer support, insulation and heating.

Founded in 1919, Halliburton is one of the world's largest providers of products and services to the energy industry. The company serves the upstream oil and natural gas industry throughout the lifecycle of the reservoir. It consists of two divisions, including drilling/evaluation and completion/production. The firm's capabilities include project management, real time services, reservoir testing/analysis, formation evaluation and hole enlargement, among others. Halliburton represents several brands, such as Easywell, Landmark, Pinnacle, Sperry Drilling and WellDynamics.

DCP Midstream is one of the largest natural gas gatherers and processors in United States. The company is involved in the marketing and production of natural gas liquids (NGL). Its customers range from large multinational petrochemical and refining companies to retail propane distributors. Based in Liberal, Kan., DCP Midstream operates in 18 states in the United States. The company's primary business segments include natural gas service, wholesale propane and natural gas liquids logistics. Additionally, its gathering systems and processing plants have connections with multiple interstate and intrastate natural gas pipelines.