2R Drilling, Inc.
USA, contract driller

Abandonrite Environmental Services Inc.
USA; Well Abandonment; Pipeline Abandonment; Reclamation and Remediation

ABB Vetco Gray
USA; oil and gas drilling and production systems and equipment for both onshore and offshore applications

Abbot Group plc
UK, drilling and facilities engineering contractor

ABC Liovin Drilling
USA, drilling contractor

Advanced Coiled Tubing
USA; coiled tubing

Advanced Extraction Technologies, Inc.
technology licensing company, engineering services company and an applied research company

Advanced Production and Loading AS
Norway, STL (Submerged Turret Loading), STP (Submerged Turret Production)

Advanced Production Systems DA
Norway, oil/gas topside Production Plants

Aggreko plc
UK, supply of temporary power, temperature control and oil-free compressed air services

Air Logistics
USA, helicopter transportation, maintenance and other support services

Aker Maritime
Norway, deepwater and floating production solutions to the offshore industry

AKITA Drilling Ltd.
Canada, oil and gas drilling contractor

Al Bawardi Enterprises
United Arab Emirates, Rock bits, horizontal drilling services, wellhead equipment, etc.

Alexander Steel Sales, Inc.
USA, downhole casing

Alfa Laval AB
Sweden, high-performance separation systems, heat exchangers, fluid handling equipment