2012: Top US-based Oilfield Service & Supply Companies

Ranked by total gross revenue. Drilling contractors ranked separately.

Schlumberger Ltd. (NYSE: SLB)

Principal offices: Houston, Paris, The Hague
Top executives: Paal Kibsgaard, CEO; Robert Drummond, president, North America
Primary focus: Supplier of technology, information solutions, and integrated project management to optimize reservoir performance.
Total gross revenue: $39.5 billion (2011) – up 44% from 2010

Halliburton (NYSE: HAL)

Headquarters: Houston and Dubai
Top executive: Dave Lesar, chairman, president, CEO
Primary focus: Production enhancement, drilling systems, drill bits, logging and perforating, completion tools, cementing, fluid services, and integrated exploration and software services.
Total gross revenue: $24.8 billion (2011) – up 38% from 2010

Baker Hughes Inc. (NYSE: BHI)

Headquarters: Houston
Top executive: Martin Craighead, president, CEO (succeeded Chad Deaton in Jan. 2012. Deaton remains chairman of the board of directors.)
Primary focus: Supplier of oilfield services, products, technology and systems to worldwide oil and natural gas industry. Provides industrial and other products and services to the downstream refining, process, and pipeline industries.
Total gross revenue: $19.8 billion (2011) – up 38% from 2010

National Oilwell Varco Inc. (NYSE: NOV)

Headquarters: Houston
Top executive: Pete Miller, chairman, president, CEO
Primary focus: Designs, manufactures, and sells equipment and components used in oil and gas drilling and production operations. Provides oilfield services and supply-chain integration services to the upstream oil and gas industry.
Total gross revenue: $12.2 billion (2010) – 2011 results not available

Cameron (NYSE: CAM)

Headquarters: Houston
Top executive: Jack B. Moore, chairman, CEO
Primary focus: Provides flow equipment products, systems, and services to worldwide oil, gas, and process industries.
Total gross revenue: $6.1 billion (2010) – 2011 results not available

FMC Technologies Inc. (NYSE: FTI)

Headquarters: Houston
Top executive: John Gremp, chairman, president, CEO
Primary focus: Designs, manufactures, and services technologically sophisticated systems and products such as subsea production and processing systems, surface wellhead systems, high-pressure fluid control equipment, measurement solutions, and marine loading systems for the oil and gas industry.
Total gross revenue: $4.1 billion (2010) – 2011 results not available

Oil States International Inc. (NYSE: OIS)

Headquarters: Houston
Top executive: Cindy B. Taylor, president, CEO
Primary focus: Oil States provides remote site accommodations with prominent market positions in the Canadian oil sands and the Australian mining regions. Oil States also manufactures products for deepwater production facilities and subsea pipelines, and provides completion-related rental tools, oil country tubular goods distribution, and land drilling services to the oil and gas industry.
Total gross revenue: $2.4 billion (2010) – 2011 results not available

Oceaneering International Inc. (NYSE: OII)

Headquarters: Houston
Top executive: M. Kevin McEvoy, president, CEO
Primary focus: Provides engineered services and products, primarily to the offshore oil and gas industry, with a focus on deepwater applications. Oceaneering also serves the defense and aerospace industries.
Total gross revenue: $1.9 billion (2010) – 2011 results not available

RPC Inc. (NYSE: RES)

Headquarters: Atlanta, Ga.
Top executive: Richard A. Hubbell, president and CEO
Primary focus: Provides oilfield services and equipment to independent and major oilfield companies in exploration, production, and development of oil and gas properties, domestically and in selected international markets. RPC offers a wide range of oil and gas services required throughout the life cycle of a well.
Total gross revenue: $1.8 billion (2011) – up 65.1% from 2010

Superior Energy Services Inc. (NYSE: SPN)

Headquarters: New Orleans
Top executives: Terence Hall, chairman of the board; David Dunlap, president, CEO
Primary focus: Serves drilling and production companies through its rental tools and its integrated well intervention services and tools, supported by an engineering staff who plan and design solutions for customers. Offshore projects are delivered by the company's fleet of marine assets.
Total gross revenue: $1.7 billion (2010) – 2011 results not available

Helix Energy Solutions (NYSE: HLX)

Headquarters: Houston
Top executive: Owen Kratz, president, CEO
Primary focus: International offshore energy company that provides development solutions and other life-of-field services to the energy market as well as to its own oil and gas business unit.
Total gross revenue: $1.2 billion (2010) – 2011 results not available

Key Energy Services Inc. (NYSE: KEG)

Headquarters: Houston
Top executive: Dick Alario, chairman, president, CEO
Primary focus: Key provides a wide range of well intervention services and has operations in all major onshore oil and gas producing regions of the continental US and internationally in Mexico, Colombia, the Middle East, Russia, and Argentina.
Total gross revenue: $1.2 billion (2010) – 2011 results not available

Core Laboratories (NYSE: CLB)

Headquarters: Houston and Amsterdam
Top executive: David Demshur, CEO
Primary focus: Provides proprietary and patented reservoir description, production enhancement, and reservoir management services to optimize petroleum reservoir performance. The company has over 70 offices in more than 50 countries.
Total gross revenue: $830 million (estimate for 2011)

Robbins & Myers Inc. (NYSE: RNB)

Headquarters: Dayton, Ohio
Top executive: Peter C. Wallace, president, CEO
Primary focus: Supplies engineered equipment and systems for critical applications in global energy, industrial, chemical, and pharmaceutical markets.
Total gross revenue: $821 million (FY2011 ending Aug. 31, 2011)

Basic Energy Services Inc. (NYSE: BAS)

Headquarters: Midland, Texas
Top executive: Ken Huseman, president, CEO
Primary focus: Provides a wide range of services to oil and gas producers in Texas, Louisiana, Oklahoma, New Mexico, Arkansas, Kansas, and the Rocky Mountain and Appalachian regions.
Total gross revenue: $728.2 million (2010) – 2011 results not available

DXP Enterprises Inc. (NASDAQ: DXPE)

Headquarters: Houston
Top executive: David Little, chairman, CEO
Primary focus: Provides maintenance, repair, operating, and production products and services, including pumping solutions. DXP operates over 90 service centers and more than 70 supply-chain service locations. Also has 3 regional distribution centers and 5 fabrication centers.
Total gross revenue: $656.2 million (2010) – 2011 results not available

CARBO Ceramics Inc. (NYSE: CRR)

Headquarters: Houston
Top executive: Gary Kolstad, president, CEO
Primary focus: Major supplier of ceramic proppant. Provides fracture simulation software and fracture design and consulting services. Also provides a broad range of technologies for spill prevention, containment, and countermeasures, along with geotechnical monitoring.
Total gross revenue: $625.7 million (2011) – up 32% over 2010

Dril-Quip Inc. (NYSE: DRQ)

Headquarters: Houston
Top executives: John V. Lovoi, chairman of the board; Blake T. DeBerry, president , CEO
Primary focus: Manufactures highly engineered offshore drilling and production equipment, which is well suited for use in deepwater, harsh environment, and severe service applications.
Total gross revenue: $566.3 million (2010) – 2011 results not available

Geokinetics Inc. (NYSE AMEX: GOK)

Headquarters: Houston
Top executive: Richard F. Miles, president, CEO
Primary focus: Provides seismic data acquisition, seismic data processing services, and multi-client seismic data to the oil and gas industry worldwide.
Total gross revenue: $558.1 million (2010) – 2011 results not available

Dawson Geophysical Co. (NASDAQ: DWSN)

Headquarters: Midland, Texas
Top executive: Stephen Jumper, president, CEO
Primary focus: Provides US onshore seismic data acquisition services as measured by the number of active data acquisition crews. Founded in 1952, Dawson acquires and processes 2-D, 3-D, and multi-component seismic data solely for its clients, ranging from major oil and gas companies to independent oil and gas operators, as well as providers of multi-client data libraries.
Total gross revenue: $333.3 million (FY 2011 ended Sept. 30, 2011) – up 62% from FY2010

Global Geophysical Services Inc. (NYSE: GGS)

Headquarters: Houston
Top executive: Richard Degner, president, CEO
Primary focus: Provides an integrated suite of geosciences solutions to the global oil and gas industry, including high-resolution RG-3D seismic data acquisition, multi-client data library products, microseismic monitoring, seismic data processing, data analysis, and interpretation services.
Total gross revenue: $254.7 million (2010) – 2011 results not available

Exterran Partners LP (NASDAQ: EXLP)

Headquarters: Houston
Top executive: D. Bradley Childers, chairman, president, CEO
Primary focus: Provides natural gas contract operations services to customers throughout the US. Exterran Holdings Inc. indirectly holds a majority interest in Exterran Partners.
Total gross revenue: $237.6 million (2010) – 2011 results not available

OYO Geospace (NASDAQ: OYOG)

Headquarters: Houston
Top executive: Gary D. Owens, chairman, president, CEO
Primary focus: Designs and manufactures instruments and equipment used by the oil and gas industry in the acquisition and processing of seismic data as well as in reservoir characterization and monitoring activities.
Total gross revenue: $173 million (FY2011 ended Sept. 30, 2011)