Schlumberger Technology BV, a subsidiary of Schlumberger NV, is a Dutch company located in The Hague. The firm provides gas and oil exploration services.

CARBO Ceramics Inc. is the supplier of ceramic proppant and the resin-coated sand. The Company is the provider of the fracture simulation software, and a provider of fracture design and consulting services, and a range of technologies for spill prevention, containment and countermeasures. The Company sells its products and services to operators of oil and natural gas wells, and to oilfield service companies. The Company's products and services are primarily used in the hydraulic fracturing of natural gas and oil wells. The Company primarily manufactures five ceramic proppants. CARBOHSP and CARBOPROP are proppants designed primarily for use in deep oil and gas wells. It also sells fracture simulation software and provides fracture design, engineering and consulting services to oil and natural gas companies worldwide through its wholly owned subsidiary, StrataGen, Inc. The Company, during the year ended December 31, 2012, wound up its business in Applied Geomechanics, Inc.

Part of Schlumberger NV, Schlumberger Technologies, Inc. is a company headquartered in Moorestown, NJ, that provides oilfield services such as distributing oil and gas information technologies and providing consulting services.

Services Petroliers Schlumberger SA provides engineering services. The company was founded on September 30, 1954 and is headquartered in Paris, France.

Expansion Energy They are a developer and licensor of breakthrough technologies designed to substantially improve the way the Energy industry and related industries operate—leading to more efficient and more profitable companies as well as a substantially cleaner and more productive world. A number of Their patented and patent-pending technologies have the potential to dramatically accelerate the rise of whole new segments of the Energy industry and to greatly enhance existing segments. Each of Expansion Energy’s innovations is a truly “game-changing” technology that is substantially different from other technologies in the marketplace.

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.

Part of Exxon Mobil Corp., Exxonmobil Upstream Research Co. is a company headquartered in Houston, TX, that engages in exploration of oil and gas.

Minera����o Curimbaba Ltda. is a private company headquartered in Brazil, with subsidiaries in Brazil. The firm conducts mining services.

Spectrum is a downhole chemical and radioactive (“RA”) tracer technology company specializing in well completion diagnostics and reservoir characterization. Spectrum’s fracture fluid identifier tracers (“FFITM”), oil-soluble tracers (“OSTTM”) and Natural Gas Tracers (“NTTM”), enable efficient, cost-effective downhole diagnostics, providing oil and gas operators with critical data to efficiently optimize reservoir development and production. Spectrum provides its services throughout North America.

Kemira Oyj engages in the provision of water quality and quantity management solutions, which improves energy, water, and raw material efficiency. It operates through the Pulp and Paper, and Industry and Water segments. The Pulp and Paper segment develops and sells products to fulfill customer needs, ensuring the portfolio of products and services for paper wet-end, focusing on packaging and board, as well as tissue products. The Industry and Water segment supports municipalities and water intensive industries in the efficient and sustainable utilization of resources. The company was founded in 1920 and is headquartered in Helsinki, Finland.

Dresser Industries, Inc. was a supplier of products and services to industries involved in oil and gas production and transmission, petroleum refining and marketing and power generation. The petroleum products and services segment used to provide services and project management for oil and gas exploration, drilling, completion, production and transmission activities. In 1998, the company merged with its main rival, Halliburton, and is now known as Halliburton Co. On 10th April, 2001 the Dresser division (excluding the former Kellogg division) entered an agreement to separate itself once again from Halliburton by management purchasing its equity, the new company to be called Dresser, Inc. The company is headquartered in Dallas, TX.

Schlumberger Canada Ltd. provides oilfield services. It supplies technology, project management and information solutions that optimize performance for customers working in the international oil and gas industry. The company is headquartered in Calgary, Canada.

Mobil Corp. operates primarily in the petroleum industry. The company is headquartered in The Woodlands, TX.

Baker Hughes, Inc. is a private company headquartered in Houston, TX. The firm manufactures oilfield equipment.

Changjiang Materials is a foundry material manufacturer, committed to four series of coated sand, reclaimed sand, casting auxiliary materials and fracturing proppant, including casting ceramsite, inkjet 3D printing sand, scrubbing sand, calcined sand, and phase change Sand, fracturing proppant, etc., are widely used in the casting of automobile, motorcycle, aviation, railway and other parts.

ARR-MAZ Products, headquartered in Winter Haven, Florida produces process chemicals used in fertilizer manufacture and asphalt paving industries in North America and worldwide.