- ABB Lummus Global
 - Provides process licenses and EPC services to the oil and gas, petroleum refining, and petrochemical process industries. - Abraxas Petroleum Corporation
- Integrated energy company that acquires producing properties, explores for and produces crude oil and natural gas.
- Abu Dhabi National Oil Company (ADNOC)
- Exploration, processing, construction, and exports in the oil and gas industry.
- Akzo Nobel Catalysts
- Supplies catalysts, technologies and related services to the oil refining and petrochemical industries.
- Albina Family of Companies
- Provider of fuels, lubricants, asphalt products, and fuel management systems.
- Alliance Engineering Inc.
- Providing engineering and project services to support energy companies in the safe and efficient development and transmission of oil and gas resources.
- American International Industries
- Investment company with holdings in industry, finance, property, media/communication, and oil & gas.
- Andorra Petroleum Co
- Providing safe, clean energy to the global markets.
- API
- Energy, oil trading, refinery, petroleum engineering, gasoline distribution.
- ARCO Gas
- Provides station locator, online application for fleet and pre-paid gas cards, and more.
- Austral Pacific Energy
- Independent oil and gas exploration and production company, operating exclusively in the Australia-Pacific region.
- Austvik Ole Gunnar Energy
- Baker Hughes
- Provider of drilling, formation evaluation, completion, and production products and services to the worldwide oil and gas industry.
- Barrows Company
- Legal reference services for aspects of international oil and gas regulations and contracts.
- BCI
- Supplier of oil and gas well drilling mud additives and fluids.
- Berry Petroleum
- Independent oil and gas production and exploration company.
 BITOR
- Produces Orimulsion a clean burn conventional fossil fuel.- BJ Services Company
- Provider of pressure pumping and other oilfield services to the petroleum industry.
- Black Bart Data Company
- Provides information on owners of oil and gas properties, including royalty, override, and working interests.
- Black Hills Corporation
- Diversified holding company with fuel production, energy marketing, and power generation operations.
- BlackRock Ventures
- Junior oil company focused on the exploration, development, and production of heavy oil in western Canada.
- Blue Dolphin Energy
- Engaged in the acquisition and development of oil and gas properties and the gathering and transportation of natural gas and condensate.
- Bongaigaon Refinery & Petrochemicals Limited (BRPL)
- Offers a range of petroleum and petrochemical products.
- BP
- Involved in the exploration and production of crude oil and natural gas and the manufacturing and marketing of petrochemicals.
- Burlington Resources
- Engaged in the exploration, development, production, and marketing of oil and gas.
- Calfrac Well Services Ltd.
- Supplies oil and gas exploration companies with acidizing, hydraulic fracturing, coiled tubing, nitrogen, and CO2 drilling and completion services.
- Callon Petroleum Company
- Exploration, development, acquisition and operation of oil and gas properties. Primary focus is the Gulf Coast region of the United States.
- Caltex
- Markets petroleum and convenience products in the Asia-Pacific region, Africa, and the Middle East.
- Canadian Natural Resources Limited
- Senior independent oil and natural gas exploration, development, and production company with operations in Western Canada, the North Sea, and offshore West Africa.
- Canadian Superior Energy
- Oil and gas exploration and production company with holdings in offshore Nova Scotia.
- CanWest Gas Supply Inc.
- A gas market aggregator offering a range of services, marketing gas to downstream markets in Canada and the United States.
- Carolina International Sales Co.
- A petrochemical firm specialising in distribution, import/export, manufacturing, reclamation and environmental management.
- Carpenter Pacific Resources
- Involved in the upstream oil and gas industry specifically aiming at production or near production opportunities and advanced exploration opportunities.
- Carroll Independent Fuel
- Providing fuel for industrial, commercial, and residential customers.
- Central Petroleum Company
- Offers a wide range of speciality oils.
- Certified Oil
- Ohio based company supplying gasoline and services in Ohio, Kentucky, and West Virginia.
- Cherne Contracting Corporation
- Heavy industrial contractor focusing in the petro-chemical and power industries. Services include civil, mechanical, and electrical engineering, and instrumentation.
- Cherrington Corporation
- Originators of horizontal directional drilling (HDD).
- Chesapeake Energy Corporation
- Engaged in the exploration and production of oil and natural gas.
- Chevron
- With sections covering fuels and motor oil, customer services, products, and more.
- ChevronTexaco
- Global energy company engaged in oil and gas exploration and production; refining, marketing, and transportation; chemicals manufacturing and sales; and power generation.
- Cheyenne Services Inc.
- An oil field service company serving the petroleum industry and specialising in running and inspecting oilfield tubulars.
- China Petroleum and Chemical Corporation (Sinopec)
- Engages in petroleum refining and the manufacturing of petrochemicals, synthetic fibres, and chemical fertilizers.
- CITGO Petroleum Corp.
- Company news and press releases from CITGO. Open a CITGO Plus account and find rebate forms for your Supergard and Mystik purchases.
- Clean Fuels
- Providing decontamination, maintenance and compliance/certification services for fuel storage tanks.
- Cleansorb Limited
- Manufacturing an acidizing chemical which improves the extraction rate of oil and gas wells.
- Comstock Resources
- Independent energy company engaged in oil and gas acquisitions, exploration, and development primarily in Texas, Louisiana, and the Gulf of Mexico.
- Conoco
- Specialises in the exploration, production, refining, and marketing of petroleum products.
- ConocoPhillips
- Integrated energy company engaged in the exploration, production, refining, processing, and marketing of petroleum and natural gas.
- Contango Oil & Gas Company
- Explores and acquires oil and gas properties primarily in the onshore Gulf Coast and offshore Gulf of Mexico.
- Credo Petroleum Corporation
- Explores for, purchases, develops, produces, and sells crude oil and natural gas.
- Cross Timbers Oil Company
- Oil and natural gas producers.
- Custom Industrial Automation
- Coke drum inspection service for the refining industry.
- D and L Energy, Inc.
- Independent natural gas and oil exploration, production, and marketing group that produces wells in Ohio and Pennsylvania.
- David Plumb and Co.
- Specialises in fuel tank cleaning and petrol station decommissioning services
- Delta Seaboard Well Service, Inc
- Performing plug, abandonment and workover services in Southeast Texas, Louisiana, Mississippi and Alabama.
- Denbury Resources Inc.
- Oil and gas exploration, acquisition, development, and production company.
- Desire Petroleum PLC
- U.K. company exploring for oil and gas in the Falkland Islands and Portugal.
- Devon Energy
- Engaged in oil and gas exploration, production, and property acquisitions.
- Digital Oilfield
- Web-based technology for the energy industry, including OpenInvoice, an application that automates the invoice generation and approval process.
- Ecopetrol
- National oil company.
- Edge Petroleum Corporation
- Independent energy company focusing on natural gas exploration by applying advanced 3D seismic data integration and visualisation techniques.
- Emerald Energy
- United Kingdom-based company engaged in exploration and production of hydrocarbons in Colombia.
- EMK3
- Online marketplace for buying and selling lease oil and natural gas production directly at the well.
- Empire Energy
- Oil and gas exploration investment company.
- EMTEC
- Offers diesel fuel additives, cold flow improvers, and oil, refinery, and petroleum additive chemistry for marine, railroad, mining, and trucking fuels
- Enbridge
- Engaged in the transportation of liquid hydrocarbons and distribution of natural gas.
- Enbridge Energy Partners
- Transports crude oil and natural gas liquids to refineries in the midwestern United States and eastern Canada.
- EnCana Corporation
- Independent natural gas producer and gas storage operator.
- Energen
- Diversified energy company with businesses in natural gas distribution and oil and gas exploration and production.
- Energy Asia Network
- Monthly publication dedicated to the oil and petroleum industry in Singapore and Asia.
- Enerplus Group
- Invests in mature crude oil and natural gas producing properties located primarily in western Canada.
- Eni
- Operating in the oil, natural gas, power generation and petrochemicals industries as well as oilfield services and engineering.
- Enterprise Oil
- Crude oil and natural gas exploration and production company.
- Entrerra Energy
- Oil and gas exploration and development in Western Canada.
- Environmental BioTechnologies, Inc.
- Providing services for the petroleum industry including bioremediation, prospecting and enhanced oil waste recovery using microbial processes.
- EOG Resources, Inc.
- Independent oil and gas company.
- Equity Oil Company
- Esso UK
- Worldwide petroleum and petrochemical company involved in the exploration and production of oil and gas, electrical power generation, and manufacturing.
- ExxonMobil Corporation
- Engaged in the exploration, production, manufacture, transportation, and sale of crude oil, natural gas, and petroleum products.
- Flogas
- Flogas is a supplier of LPG (liquid petroleum gas) for homes and businesses in the U.K. Also offers delivery of refill bulk storage tank cylinders for central heating, barbecue or camping cookers, and patio heaters.
- Flying Star Transport
- Trucking liquid cargos such as gasoline, diesel, or aviation fuels from the source of supply to the end user in Texas, Oklahoma, New Mexico, Kansas, Colorado, Missouri, and Arkansas.
- Forest Oil Corporation
- Engaged in the exploration, acquisition, development, production, and marketing of natural gas and crude oil.
- Freehold Royalty Trust
- A closed-end investment trust which receives and distributes royalty income from a diversified asset base of oil and gas properties across western Canada.
- Frontier Oil
- Independent oil refining and marketing company whose gasoline, diesel, and asphalt products are marketed in the Rocky Mountain and Plains States.
- Fuelman of Michigan
- Nationwide commercial fueling network of thousands of convenient fueling locations linked by an electronic purchasing, management, and reporting system.
- Futura Petroleum
- Markets and distributes fuels low in benzene, sulpher and aromatic molecules.
- Gazprom
- Extracts gas, develops new fields, and builds pipelines.
- GeoDiamond
- Geoservices
- International oil and gas service company proposing mud logging, well testing, well intervention, field surveillance, and production facilities.
- Getty Petroleum Marketing, Inc.
- Marketers and distributors of petroleum products.
- Giant Industries Inc.
- Oil and gas refiner and distributor, with gas stations throughout the Southwestern U.S.
- Gleaner Oil & Gas
- Distributes oil and LP gas products to commercial and residential customers in Scotland.
- Global Petroleum Corp.
- GMX Resources
- Independent oil and gas producer.
- Gulf Atlantic Drilling
- Specialising in Monitor well and Recovery well installation, direct push soil sampling and large diameter installations.
- Gulf Canada Resources
- Explores for, develops, produces, and markets conventional, heavy and synthetic crude oil, natural gas liquids, and natural gas.
- Hallmark Technical Services
- Supplies a casing and tubular related support system to the oil and gas industry.
- Harvest Natural Resources
- Independent energy company engaged in the exploration, development, and production of oil and gas properties.
- Helmerich & Payne
- Engaged in contract drilling and oil and gas exploration and production.
- Hess Corporation
- Engaged in the exploration for and the production, purchase, transportation, and sale of crude oil and natural gas, as well as refined petroleum products.
- Hi-Lo Flare Systems and Services (UK) Ltd.
- Specialises in environmental friendly gas flaring and landfill, petrochemical, oil and mine field degassing.
- Hindustan Petroleum Corp Limited
- Holly Corporation
- Is engaged, through its affiliates (Navajo Refining Company and Montana Refining Company), in the refining, transportation, terminalling and marketing of petroleum products.
- Hunting PLC
- Through its subsidiaries, provides oil field services, energy marketing and transportation, ship brokerage, oil and gas exploration, and petrochemical equipment.
- Husky Oil@
- Hycal Energy Research Laboratories Ltd.
- Reservoir engineering laboratory focussed on optimizing reservoir production through advanced technologies.
- Hyundai Oil Bank
- Supplier of various types of petroleum products in Asia.
- Imperial Oil
- Producer of crude oil in Canada and refiner and marketer of petroleum products.
- Indian Oil Corporation Limited
- Under the administrative control of the Ministry of Petroleum and Natural Gas, Government of India.
- IndigoPool.com
- Interline Resources Corporation
- Specialises in used oil recycling and natural gas gathering, fractionating, and transportation.
- International Fuel Technologies
- Produces proprietary fuels using a precombustion treatment system.
- InterOil Corporation
- Focused on the development of an oil refinery in Papua New Guinea (PNG).
- IOR Energy
- Specialises in oil exploration, production, and services, including the supply and installation of process equipment for the petroleum and refining industries.
- Irving Oil Limited
- ISL
- Services, training, and products concerning automatic petroleum testing laboratory analysers.
- Japan Energy Corp
- Integrated energy supplier, with petroleum operations extending from exploration and development to refining and marketing.
- JP Oil Company, Inc.
- Independent oil and gas producer with properties throughout North America.
- K2 Energy Corporation
- Emerging junior oil and gas exploration and production company.
- Kerr-McGee Corporation
- Energy and inorganic chemical company with worldwide operations.
- Kildair Service Ltd
- Manufacturing, sale and distribution of marine residual fuels.
- Kuwait National Petroleum Company
- Langham Oil Conferences
- Specialist in organising conferences for the oil industry.
- Lennart Hojer AB
- Manufacturer of fuel additives.
- Linpro Petroleum Services Limited
- Provides oil companies, environmental consulting firms, and the private sector with a range of contracting services.
- Louisiana Mid-Continent Oil and Gas Association
- Historical, statistical, environmental and legislative information about oil and gas in Louisiana and the Gulf of Mexico.
- LUKOIL
- Russian oil producer with reserves located primarily in western Siberia.
- Lundin Petroleum
- Swedish company with oil exploration, development, and production around the world.
- Lyondell Chemical Company
- Manufacturer and marketer of basic chemicals and polymers.
- Madrona Energy
- Oil and gas royalty buyer and provider of petroleum management services. Madrona Energy buys oil and gas royalty interests from estates and individuals across the United States.
- Magnum Hunter Resources
- Independent oil and gas producer with interests in Texas, Oklahoma, New Mexico, Louisiana, Arkansas, and the shallow Gulf of Mexico.
- Marathon Oil
- Engaged in the worldwide exploration, production, and transportation of crude oil and natural gas.
- Mayco WellChem, Inc.
- Manufacturing polymer additives and systems for petroleum drilling, workovers and completions.
- Mesquite Oil Tools, Inc.
- Oilfield service company.
- Midcoast Energy Resources
- MK Tech Solutions, Inc.
- Provides services for in situ and ex situ waste remediation, as well as thermally enhanced oil and miscible oil recovery.
- Mobil
- With information on products and services for consumers, businesses, and resellers.
- Mobil UK
- Explores and produces oil and gas in the north sea and refines and markets lubricants and other oil and gas related products.
- Montello, Inc.
- Provides mud system additives to combat problems in drilling wells, and chemicals as rheology modifiers, surfactants, and emulsifiers in food and industrial applications.
- Multi-Fluid
- Manufacturers of high accuracy microwave based meters for measuring multiphase flow and water cut for the petroleum industry.
- Newfield Exploration Company
- Explores, develops, and acquires oil and gas properties principally in the Gulf of Mexico.
- Newstar Resources
- Oil and gas exploration and production company selling directly into the Eastern and Midwestern markets.
- Nexen
- Oil and gas exploration and production company.
- Niko Resources Ltd.
- Nippon Oil Corporation
- Japanese petroleum company engaging in exploring, importing, and refining crude oil. Also manufactures and markets petroleum products including fuels and lubricants.
- Noble Energy
- Provides independent oil and gas exploration and development.
- North Coast Energy
- Natural gas and oil company engaged in exploration, development, and production activities primarily in the Appalachian and Illinois Basins.
- Nowsco Well Service Ltd.
- OAO Tatneft
- Producer of crude oil.
- Occidental Petroleum
- Engages in exploration, development, and marketing of crude oil and gas, and manufactures and markets basic chemicals, polymers, and plastics.
- Oil & Gas Electronic Directory
- Oil & Gas products and services in the petroleum and chemical industry, view Russian and Chinese brochures to assist engineers and geoscientists in frontier exploration and production
- Oil & Natural Gas Corporation Ltd. (ONGC)
- Engaged in hydrocarbon exploration and production and offers related R&D services.
- Oil and Gas India
- News website covering oil and gas activities in India, including onshore and offshore oil and gas exploration, production operations, service companies, employment,s new products, and related events in India.
- Oil India Limited
- Engaged in exploration, production, and transportation of crude oil and natural gas resources.
- Oil Lease Buyers
- Consulting, valuation, and purchase of oil, gas, and mineral royalty interests in North America.
- Oil Price Information Service (OPIS)
- News and prices for petroleum products, feedstocks, naphtha, petrochemicals, pipeline rates, transportation, truckstop guides, natural gas, gas liquids, and jet fuel.
- OLCO Petroleum Group Inc.
- Markets refined products and blends of gasoline.
- Olis
- Gas station chain throughout Iceland (in Icelandic).
- OPET Petroleum A.S.
- Distributor of fuel, manufacturer of automotive lubricants, industrial greases, and car care products (in English and Turkish).
- OSCA
- Oilfield service, product, and equipment company providing engineered well completion services to the oil and gas industry.
- Pacific Pride Fuel Network
- Membership club offering offering petroleum and lubricants to commercial vehicles at over 1,000 stations in the U.S. and Canada.
- PanCanadian Energy
- Produces and markets crude oil, natural gas, and natural gas liquids.
- Parker Drilling Company
- Provides land contract drilling services to firms in the oil and gas industry.
- Patterson-UTI Energy
- Provider of onshore contract drilling services to exploration and production companies in North America.
- PAZ
- Oil & gas company in Israel.
- Pembina Pipeline Income Fund
- Generates stable cash distributions for Unitholders from a pipeline transportation network.
- pennNET
- Focusing on developing vertical portals (vortals) for critical global markets, specialising in oil and gas industries.
- Pertamina (Persero)
- Indonesia's state-owned petroleum supply company.
- Petro Kazakhstan
- International energy corporation engaged in the exploration, development, production, acquisition, refining, and marketing of oil and refined products in Kazakhstan.
- Petro-Canada
- Integrated oil and gas company.
- Petrobras
- Involved in the exploration, production, refining, retailing, and transportation of oil and its byproducts.
- PetroChina
- Engaged in petroleum-related activities including crude oil, natural gas, and chemical production.
- Petróleos de Venezuela SA
- State-owned PDVSA conducts oil and natural gas exploration, production, refining, and marketing.
- Petróleos Mexicanos (Pemex)
- Petroleum Development Corporation
- Explores for, develops and produces oil and gas primarily in the Appalachian Basin area of West Virginia, Tennessee, Pennsylvania and Ohio.
- Petrosilicon
- Features industry news, products, services, resources, and membership directory.
- Phenix Group, The
- Diversified company with interest in oil and gas, telecommunications, energy, transportation, mineral exploration/development, timber, and tourism within Latin America.
- Phillips Petroleum
- Explores and produces crude oil, natural gas, and liquids, gathers, processes, and markets natural gas produced by others, refines and transports petroleum products, and manufactures petroleum-based chemical products.
- Pilot Corporation
- Operates gas stations and convenience stores across the U.S.
- Pioneer Natural Resources
- Independent exploration and production company with reserves in the United States, Canada, Argentina, and Africa.
- Pipeline Industry Directory
- Free reference source to companies in the oil, gas, pigging, wastewater and associated pipeline industries world-wide.
- Pogo Producing Company
- Engages in oil and gas exploration, development, acquisition, and production activities.
- Precision Well Testing Company
- Providing equipment and personnel to assist in reservoir evaluation and testing.
- Premcor
- Independent refiner of gasoline, diesel, and aviation fuel.
- Premier Oil
- Gas and oil company with exploration and production interests in the U.K., Indonesia, and Pakistan.
- Prima Energy Corporation
- Engaged in the exploration for, acquisition, development, and production of, crude oil and natural gas.
- PrimeWest Energy Trust
- Actively acquires, develops, produces, and sells natural gas, crude oil, and natural gas liquids.
- Pro-Tech Solutions, Inc.
- Helps oil and gas processing/refining/productions facilities maximize the use of internal resources to meet the requirements of process safety management and company policies.
- PTT Public Company Limited
- Fully integrated gas company and state enterprise under the supervision of the Ministry of Industry.
- PUMPandTANK.com
- Online equipment sales for service stations and fueling fleets.
- Pure Resources
- Independent exploration and production company that develops and produces oil and natural gas throughout the United States.
- Qatar Petroleum
- National corporation completely owned by the State of Qatar. Responsible for all oil and gas industry processes in Qatar, including exploration, production, refining, transport, distribution, and export.
- Quicksilver Resources
- Gas and oil exploration and production.
- RAM Energy
- Independent gas producer which acquires and develops diversified gas reserves, primarily located in the Mid-Continent Area or Permian Basin.
- Raptor Capital Corporation
- Information on corporate strategy focusing on acquisition of oil and gas properties.
- REgroup
- Purchaser of mineral rights producing oil and gas royalties in Texas and the rest of the United States. REgroup buys oil and gas royalty interests from individuals and estates.
- Renkert Oil, Inc.
- Offering a selection of petroleum products, including plasticizers, paraffinic oils, aromatic oils, processing aids, and ParaLux.
- Repsol YPF
- Engaged in the exploration, development, and production of oil and natural gas.
- Roc Oil Company (ROC)
- Operates onshore and offshore oil exploration and production worldwide.
- Roxar
- Provides software, consulting services, and equipment to the upstream oil and gas industry, including reservoir modelling and stochastic simulation, downhole monitoring and flow measurement, and field planning and reservoir optimisation technology.
- Royal Dutch/Shell Group of Companies
- Global energy producer that explores for, produces, and markets oil, natural gas, and chemicals.
- Royalty Purchaser
- Purchaser of gas, oil, and mineral rights from estates and individuals.
- Samuel Cooke & Co. Ltd
- Specialises in the manufacture and supply of industrial, automotive, and metalworking lubricants and environmentally friendly fuels.
- Santos
- Engages in oil and gas exploration and production.
- Saudi Aramco
- Produces, manufactures, markets and ships crude oil, natural gas and petroleum products, and engages in refining and marketing joint ventures worldwide.
- Scott Pickford Group
- Providing reservoir management solutions.
- SGS Redwood Services
- Providing inspection and control services to the petroleum and petrochemicals industries.
- Shell Oil Company
- Holding company whose subsidiaries explore, develop, produce, purchase, transport, and market crude oil and natural gas in the United States.
- Shell UK
- Sibneft
- Explores, produces, refines, distributes, and markets oil and refined products.
- Sinopec Shanghai Petrochemical Co.
- Processes crude oil into products, including synthetic fibres, resins and plastics, intermediate petrochemicals, and petroleum products.
- Slovene Oil Company
- Soloco
- Upstream oilfield and environmental construction contractor. Specialising in temporary and portable roads.
- Solv-Ex Corporation
- Developing the Alberta, Canada, oil sands reserves.
- Sonatrach
- Algerian oil and gas company.
- SPM
- Manufactures and distributes oilfield equipment including flow control products (swivel joints; plug, relief, check, and butterfly valves; unions; and piping), and well service pumps.
- St. Mary Land & Exploration Company
- Engaged in the exploration, development, acquisition, and production of natural gas and crude oil in the United States.
- Statia Terminals
- Provides transshipment, storage, blending, and bunkering services to the petroleum industry.
- Statoil
- Integrated oil and gas producer based in Norway.
- Sunoco
- Manufactures and markets petroleum products that include Sunoco gasoline, heating oil, lubricants, and petrochemicals.
- Swift Energy Company
- Natural gas and oil company engaged in the development, exploration, acquisition, and operation of oil and gas properties, with a focus on onshore and inland water areas of the Texas and Louisiana Gulf Coast, and on New Zealand's Taranaki Basin onshore areas.
- Syncrude Canada Ltd.
- Producer of blended crude oil.
- Talisman Energy
- Internationally diversified oil and gas producer.
- Tamilnadu Petroproducts
- Offering petrochemicals and petro-extracts.
- Taurus Corporation, The
- Buys oil and gas royalties and mineral interests throughout the United States.
- TBC-Brinadd
- Specialises in creating drilling fluid systems and additives for demanding well conditions.
- Tesoro Petroleum
- Refiner and marketer of petroleum products.
- Texaco
- Engages in worldwide exploration for and production, transportation, refining, and marketing of crude oil, natural gas, and petroleum products.
- Texas Aromatics
- Petrochemical marketing company specialising in aromatics, olefins, heavy fuels, and gasoline blendstocks. Based in Houston, Texas.
- Tom Brown
- Engaged in the exploration, development, acquisition, production, and marketing of natural gas, natural gas liquids, and crude oil.
- Tosco
- Refiner and marketer of petroleum products.
- Total SA
- Engaged in the exploration, production, refining, marketing, and trading of oil, natural, and gas products.
- TOTAL UK
- Provides information about the U.K. oil company including service station locations, heating oils, fuels, lubricants, bitumen, and solvent products.
- Transco
- Transports gas for its customers through a UK-wide pipeline network.
- Tricat Industries, Inc.
- Regeneration and resale of spent petroleum refinery catalysts.
 Tullow Oil
- International oil and gas exploration and production company specialising in gas-to-power projects.- Ultrapar Participações
- Distributor of liquefied petroleum gas in Brazil and producer of petrochemicals and chemical products.
- Unit Corporation
- Diversified energy company involved in oil and natural gas exploration and production.
- Universal Water Finder
- Offers a product which detects the presence of water and water/alcohol additives in gasoline and other petroleum based products.
- Unocal
- Produces and sells crude oil, natural gas, and geothermal energy, and manufactures and sells petroleum fuels and lubricants, fertilizers, and speciality minerals.
- Upton Resources Inc.
- Oil exploration, development and production company with principal operations in southeast Saskatchewan.
- Vaalco Energy
- Independent energy company engaged in the acquisition, exploration, development, and production of crude oil and natural gas.
- Valero Energy
- Diversified energy company engaged in the production, transportation, and marketing of clean-burning fuels and natural gas.
- Veritas Associates
- Oil services company offering drilling rig inspections, management audits, and drilling efficiency programmes.
- Walton Construction Company
- Specialises in any oilfield construction, pipelining, maintenance, or installation.
- Western Petroleum Company
- Independently owned petroleum marketing company, providing gasoline fuels, propane, aviation fuels, and natural gas.
- Western States Petroleum Assoc
- WSPA represents companies which account for most of the exploration, production, refining, transportation and marketing of petroleum and petroleum products in six Western states.
- Williams Companies
- Moves, manages, and markets a variety of energy products, including natural gas, liquid hydrocarbons, petroleum, and electricity.
- Wiser Oil Company
- Site provides current financial data, company history, and information on areas of operation.
- Woodhill Engineering Consultants
- Specialising in multi-discipline design and operations work, including safety, environmental and cost estimation.
- Woodside Petroleum
- Operates Australian North West Shelf Gas energy project, and produces a range of oil and gas products.
- World Fuel Services Corporation
- Markets aviation and marine fuel products and related risk management, logistics, and services.
- YUKOS
- Oil and gas company headquartered in Moscow, Russia.
- Ziff Energy Group
- Offers a combination of corporate, natural gas strategies and regulatory support for Canadian, American, and international energy companies and government agencies.
|
