Baker Hughes Inc.
- Services, tools and software for drilling and formation evaluation, well completion, production management and seismic data collection and interpretation.
- http://www.bakerhughesdirect.com/

International Business Development Co LLC
- Engineering design of oil and gas facilities, procurement, construction, operation and maintenance, well engineering. Located in Oman.
- http://www.ibdoman.com/

Darztech Engineering
- Provides engineering design, feasibility studies and planning as well as construction management, facilities and maintenance programs.
- http://www.darztech.net

Parker Drilling Co.
- Worldwide company which provides offshore and onshore contract drilling and drilling-related services. (NYSE: PKD)
- http://www.parkerdrilling.com/

PetroSkills
- Petroleum training offering practical short courses focusing on application and hands-on utility. Includes course descriptions, instructors and online registration.
- http://www.petroskills.com/

HTK Consultants, Inc.
- Offers petroleum engineering and wellsite supervision. Designs and fabricates specialty drilling and completion products for the subsea environment.
- http://www.htkconsultants.com/

Helix Energy Solutions Group
- Provides subsea construction, inspection, maintenance, repair and salvage services to offshore natural gas and oil industry.
- http://www.helixesg.com/

Puyang Zhongyuan Sanli Industry Co., Ltd.
- Manufacturer of oil drilling auxiliaries in China, offering a diverse range of well drilling, well cementing, and oil extraction chemicals. Also produces glycine.
- http://www.sanli-group.com

Midstates Fuel Services
- Specializes in cleaning contaminated fuels and light oils.
- http://mysite.verizon.net/res1nhlq/midstates/

Fuelcare Ltd.
- Provides solutions to prevent and remediate water and microbial contamination in fuel storage systems. Based in the UK.
- http://www.fuelcare.com/

PanTerra Geoconsultants B.V.
- Geoscience consultancy group providing services to the international oil and gas industry specializing in integrated reservoir studies and consultancy. Based in the Netherlands.
- http://www.panterra.nl/

Schlumberger
- Global oilfield and information services company with a major focus on energy
- http://www.slb.com/

WaveTrak Electronics Ltd.
- Manufactures pipeline pigging equipment for observation and tracking of pipeline conditions.
- http://www.wavetrak.ca/

Bateman BV Engineering
- Providers of engineering, procurement, construction, maintenance, and business services globally.
- http://www.batemanbv.com/

Diamond Energy Services Inc.
- Oilfield service of gas and oil wells in Saskatchewan and Alberta.
- http://www.diamondenergy.ca/

GFI-Petromark
- Provider of marking, detection, analysis and control systems for the oil industry. Site contains information about the company and molecular fuel marker technology.
- http://www.gfi-petromark.com/

Everbrook Systems Ltd
- Process design and EPC contractor for water, waste water and oily wastewater treatment to the petrochemical and municipal markets.
- http://www.everbrook.com

Gastec Technology Products and Services
- Providing gas supplies, advanced consumer and commercial technology utilizing gas, and consulting on most efficient utilization of gas.
- http://www.gastectechnology.com

SMS Group
- Provides management, design and logistical services. Also custom manufactures blow out preventers and other hydraulic equipment.
- http://www.smsgrp.com

LiquiFile Services
- An electronic tax service for federal and state tax reporting.
- http://www.liquifileservices.com

Blair Nelson Enterprises Ltd
- Pipeline and facility construction in central and northern Alberta, Canada.
- http://www.bnelsonent.com

DTN Dimond Control Systems, Inc.
- Terminal automation using the Internet as the centralized point of access.
- http://www.dtndiamondcontrol.com

Tembi Energy Industries
- Providing engineering, procurement and management for oil and gas projects. Based in Iran.
- http://www.tembi-energy.com/

IROilRigs
- Holding company for a group of companies which lease or sell drilling equipment, do contract drilling, and build small-scale refineries. Operating mainly in Indonesia, China, Uzbekistan, and Kazakhstan.
- http://www.iroilrigs.com/html/home.html?/

SDV Oilfield
- Worldwide logistical support and management.
- http://www.sdvoilfield.com

PT WIJAYA PURA
- Indonesian company providing complete project services including engineering, project management, construction, and procurement of supplies.
- http://www.wijayapura.com

Island Operating Company, Inc.
- Offshore property management in the Gulf of Mexico.
- http://www.islandoperating.com/

Oilfields Supply Center
- Dubai-based company providing onshore facilities, logistical support, and engineering to Persian Gulf area and south Asia.
- http://www.oscdubai.com/

Petraglobal
- Expertise in hydraulics, pneumatics and instrumentation. Engineer and supply gas and oil systems on a "turn-key" basis. Spare parts for Petrogas brand systems.
- http://www.petraglobal.nl/

ISN
- IT and telecommunications consultants specialising in the oil and gas industry, offshore development and remote office locations.
- http://www.isnsolutions.com/

Axens
- Serving the refining and processing industry. Products include processes, catalysts, adsorbents and equipment, and a complete set of services optimizing performance.
- http://www.axens.net/

Lanmark Engineering Inc.
- Engineering, procurement, construction and management services for western Canada.
- http://www.lanmark.net/

Flow Petroleum Services Inc.
- Contract management of operations, human resources, reporting requirements, logistics and procurement. Providing contract personnel.
- http://flowps.com/

Fluor Corporation
- Providing engineering, procurement, construction, maintenance, and business services worldwide.
- http://www.fluor.com

Chemical Tracers Inc.
- Inject chemical tracers into a single well and then produce fluids from the well to determine residual oil saturation, connate water saturation and fractional flow.
- http://www.chemtracers.com

DJI & Associates, Inc.
- Engineering design and drafting services for the natural gas pipelines.
- http://www.djiinc.com

Halliburton Company
- A major services and construction company, including well logging, well completion, and reservoir engineering.
- http://halliburton.com/

PetroAcct, L.P.
- Operational accounting, land administration and production accounting outsourcing services.
- http://www.petroacct.com/