In 2000, National Oilwell merged with IRI International Corp. (founded as a merger of Ingersoll Rand Oilfield Products Co. and IDECO Inc. (International Derrick and Equipment Company)),[3] founded and managed by Hushang Ansary, which manufactures and sells drilling rigs and specialty steel products.

[7] At the time, Grant Prideco held 60% of the global drill pipe market and operated 25 manufacturing sites worldwide.

GustoMSC, originally the engineering office of Gusto Shipyard, became part of NOV's Rig Technologies segment.

[8] In late 2019, NOV bought Bellingham, Washington-based Ershigs, a fabricator of custom pipes and tanks.

[14] After overseeing NOV’s spinoff of its distribution business, Pete Miller became the Executive Chairman and Chairman of the Board of DNOW (NYSE:DNOW), formerly known as DistributionNOW and NOW Inc.[15] He held these roles until his retirement on October 1, 2017[16] Rig Technologies engineers and manufactures drilling rigs, drilling equipment packages, and related capital equipment (including top drives, iron roughnecks, drawworks, blowout preventers, mud pumps, risers, pipe handling, power and control systems) necessary to drill oil and gas wells, as well as marine construction equipment such as heavy-lift cranes, mooring machinery, jacking systems, pipelay and cablelay systems, and marine riser tensioners.

The segment produces intervention and stimulation equipment for pressure pumping, coiled tubing, and wireline operations; composite piping systems, pressure vessels, and structures; integrated processing, production, and pumping equipment (including artificial lift) for upstream, midstream, and industrial operations; hydrate inhibition and gas processing technologies; subsea and floating production systems, including flexible pipe and subsea water injection technologies; integral and weld-on connectors for conductor strings, surface casing, and liners; and completion tools—including those involved in multistage hydraulic fracturing—liner hanger systems, and subsurface safety valves.