National Oilwell Varco

Kestone's spiral-welding process is a breakthrough in tower manufacturing, allowing for the support of larger next-generation turbines. The company can significantly reduce the cost of onshore and offshore towers while also allowing turbines to reach higher into stronger winds for more energy absorption.

Fjords Processing is a global leader in the provision of processing technology, systems and services to the upstream oil and gas industry. Fjords Processing has a long and rich history of developing and providing innovative technologies related to separation, water treatment, and oil and gas processing solutions.

Robbins & Myers, Inc. is a leading supplier of engineered, application-critical equipment and systems in global energy, chemical and other industrial markets.

Fiberspar is the industry leader in high-strength, fiber-reinforced tubular products for the oil and gas industry. Their innovative spoolable LinePipeâ„¢ products are the new everyday choice of the industry's top producers, providing dramatic cost and performance improvements over conventional steel and stick fiberglass.

Wilson International is a privately held company that distributes pipes, valve and valve automation, fittings, mill and tool supplies.

Enerflow Industries is a fabricator and manufacturer of pressure pumping, blending, cementing, and other service equipment.

NKT Flexibles I/S designs and manufactures flexible pipe products and systems for the offshore oil and gas industry.

STSA is a company that was acquired by National Oilwell Varco in 2011.

Ameron International is a privately held manufacturer of highly-engineered products and materials for the chemical and industrial markets.

Advanced Production and Loading (APL) is a market leader in the development, fabrication and sale of advanced systems for the offshore production, specialising in storage and transport of oil and gas by ships.APL was listed on the Oslo Stock Exchange in March 2005.

South Seas Inspection is a privately held company that provides a wide array of oilfield services including rig and derrick construction.

Offers development of drill stem technology, and manufacture, sale, and service of drill pipes, drill bit technology, and specialty tools.

Welch Sales and Service is a privately held company that is into renting and leasing heavy construction equipment.

NQL Energy Services is a provider of downhole tools, technology and services used primarily in drilling applications in the oil and gas.

Iri nternational manufacturers of land-based drilling and well-servicing rigs and rig component parts for use in the global oil and gas industry and is principally engaged in the design, manufacture, service, sale and rental of onshore and offshore oilfield equipment for the domestic and international markets. Through its IRI and Cardwell operations, the Company designs and produces rigs to meet the special requirements of its global clientele for service in remote areas and harsh climatic conditions. Through its Bowen Tools Division, the Company is a leading manufacturer of downhole fishing and drilling tools and offers a complete line of oilfield power equipment, including top drives, power swivels, wireline pressure control equipment and coiled tubing systems, which complement the Company's drilling and well- servicing rigs. The Company also manufactures and maintains a significant inventory of replacement parts for rigs produced by the Company and by others, enabling it to meet the needs of its customers on a timely basis. As a result of its diverse product lines and the availability, on a sale or rental basis, of the products of the Bowen Tools Division, the Company is able to satisfy a wide range of its customers' special requirements. Through its Specialty Steel Division, the Company produces premium alloy steel for commercial and military use and for use in manufacturing oilfield equipment products.