Itrec BV, a subsidiary of Ace Innovation Holding BV, is a Dutch company located in Schiedam that provides engineering services.

Weatherford Technology Holdings LLC engages in the provision of scientific and technological services. The company is headquartered in Houston, TX.

Deep Oil Technology, Inc. is a private company headquartered in the United States involved in crude petroleum and natural gas.

Technip France SA provides technological and engineering services. It offers supply of equipment, construction and project management solutions. The company was founded in 1958 and is headquartered in Courbevoie, France.

China National Offshore Oil Corporation, or CNOOC Group, is a major national oil company in China. It is the third-largest national oil company in the People's Republic of China, after CNPC (parent of PetroChina) and China Petrochemical Corporation (parent of Sinopec). The CNOOC Group focuses on the exploitation, exploration and development of crude oil and natural gas in offshore China. The Group is the largest producer of offshore crude oil and natural gas in China and one of the largest independent oil and gas exploration and production companies in the world. The Group mainly engages in exploration, development, production and sale of crude oil and natural gas. The Group’s core operation areas are Bohai, Western South China Sea, Eastern South China Sea and East China Sea in offshore China. Overseas, the Group has oil and gas assets in Asia, Africa, North America, South America, Oceania and Europe. As at 31 December 2015, the Group owned net proved reserves of approximately 4.32 billion BOE, and its average daily net production was 1,358,022 BOE (unless otherwise stated, all amounts of reserve and production in this report include our interests in equity method investees). The Group had total assets of approximately RMB664.4 billion.

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

AMCOL International engages in the development and application of minerals, technology products, and services to various industrial and consumer markets. The company’s performance materials segment mines, processes, and distributes bentonite and bentonite-related products, chromite, and leonardite for use in various markets, including metal casting, pet care, laundry care, and drilling industries. This segment offers blended mineral binders and organic additives. The company provides performance materials for metalcasting, household and personal care, specialty materials, and basic minerals. They also provide construction technologies such as lining, remediation, building materials, and drilling products. The Energy Services segment of the firm is creating new ways to improve cost-efficient energy production that offers a wide range of technologies, products, and services for all phases of oil and gas production throughout the world. The transportation segment is a strategic resource in supporting customers with domestic rail, trucking, and ocean transportation services around the world. AMCOL International is a U.S.-based company that was founded in 1927.

CNOOC China Ltd. produces oil and gas in China. It provides prospecting, refinement and processing, and sale of offshore oil and natural gas products. The company also offers offshore petroleum exploration, development, production, and sales. CNOOC China was founded in 1999 and is headquartered in Beijing, China.

DSME is a premium shipbuilding and offshore company. DSME's vessels are highly appreciated for their finest quality in the world's shipbuilding market where established major players in the world economy such as Europe and America compete. Started in 1973 at Okpo Bay, Geoje Island, located on the southeastern tip of the Korean Peninsula, the shipyard of DSME was completed in 1981. DSME has since grown into the world's premium shipbuilding and offshore contractor who is specialized in building various vessels, offshore platforms, drilling rigs, FPSO/FPUs, submarines, and destroyers. The shipyard which spans an area of 4.9 million meters squared encompasses the world's largest dock with a million-ton capacity and is optimized for building high-tech motor vessels using cutting-edge equipment, including a 900-ton goliath crane. DSME manufactures high-quality products based on its vast IT expertise, well-managed shipbuilding technologies, superb fixed-platform construction capacities, large-scale project management know-how, and submarine/destroyer construction technologies.

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.

Vetco Gray, Inc. provides oil and gas drilling equipment. It offers equipment and services for onshore and offshore drilling and production, single well onshore drilling projects, multiple well deep water facilities, and subsea production systems. The company was founded on February 5, 1986 and is headquartered in Dallas, TX.

Baoji Oilfield Machinery Co. Ltd. is a company headquartered in Baoji, China and ultimately controlled by the Government of China. The firm manufactures and distributes oilfield machinery and equipment.

Shell Oil Company is the United States-based wholly owned subsidiary of Royal Dutch Shell, transnational corporation "oil major" of Anglo-Dutch origins, which is amongst the largest oil companies in the world. Approximately 80,000 Shell employees are based in the U.S. The U.S. headquarters are in Houston, Texas. The current president is Bruce Culpepper, a graduate of the University of Alabama. Shell Oil Company, including its consolidated companies and its share in equity companies, is one of America's largest oil and natural gas producers, natural gas marketers, gasoline marketers and petrochemical manufacturers.

NL Industries, Inc. (NL) is a holding company. The Company operates in the component products industry through its majority-owned subsidiary, CompX International Inc. The Company operates in the chemicals industry through its non-controlling interest in Kronos Worldwide, Inc. As of December 31, 2011, it owned 87% interest in CompX International Inc and 30% interest in Kronos Worldwide, Inc. The Company also owns 100% of EWI RE, Inc., an insurance brokerage and risk management services company. CompX is a manufacturer of engineered components utilized in a variety of applications and industries. Kronos is a global producer and marketer of value-added titanium dioxide pigments. In July of 2011, CompX completed the acquisition of an ergonomic component products business

Fugro Engineers BV, a subsidiary of Fugro NV, is a company headquartered in the Netherlands that provides geo-consulting services, site investigations, interpretation and foundation engineering.