Baker Hughes is an energy technology company. The company's segments are: Oilfield Services, which provides products and services for onshore and offshore operations ranging from drilling, evaluation, completion, production, and intervention; Oilfield Equipment, which provides products and services for the subsea, offshore surface and onshore operating environments; Turbomachinery and Processing Solutions, which provides equipment and related services for mechanical-drive, compression and power-generation applications; and Digital Solutions, which includes condition monitoring, industrial controls, non-destructive technologies, measurement, sensing, and pipeline solutions.

Continental Resources is an independent crude oil and natural gas company engaged in the exploration, development, and production of crude oil and natural gas mainly in the North, South and East regions of the U.S. The North region consists of properties north of Kansas and west of the Mississippi River and includes North Dakota Bakken, Montana Bakken, and the Red River units. The South region includes all properties south of Nebraska and west of the Mississippi River including various plays in the South Central Oklahoma Oil Province and Sooner Trend Anadarko Canadian Kingfisher areas of Oklahoma. The East region is comprised of undeveloped leasehold acreage east of the Mississippi River.

Halliburton assists its customers throughout the lifecycle of the reservoir, from locating hydrocarbons and managing geological data, to drilling and formation evaluation, well construction and completion and optimizing production throughout the life of the asset. The company's segments are: Completion and Production, which delivers cementing, stimulation, intervention, pressure control, specialty chemicals, artificial lift and completion products and services; and Drilling and Evaluation, which provides field and reservoir modeling, drilling, evaluation and wellbore placement solutions that enable customers to model, measure, drill and optimize their well construction activities.

Schlumberger provides technology for reservoir characterization, drilling, production and processing to the oil and gas industry. The company has four segments: Reservoir Characterization, which consists of the principal technologies involved in finding and defining hydrocarbon resources; Drilling, which consists of the principal technologies involved in the drilling and positioning of oil and gas wells; Production, which consists of the principal technologies involved in the lifetime production of oil and gas reservoirs; and Cameron, which consists of the principal technologies involved in pressure and flow control for drilling and intervention rigs, oil and gas wells and production facilities.

Whiting Petroleum is an independent oil and gas company engaged in development, production, acquisition, and exploration activities primarily in the Rocky Mountains region of the U.S. The company's existing operations and capital programs are focused on organic drilling activities and on the development of previously acquired properties, while selectively pursuing acquisitions that complement its existing properties. The company principally sells its oil and gas production to end users, marketers and other purchasers that have access to nearby pipeline or rail takeaway. In areas with no access to gathering pipelines, oil is trucked or transported to terminals, market hubs, refineries or storage facilities.