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• R.C. Costello & Assoc.
  " quality chemical and environmental engineering services, advanced and emerging process technologies, and regulatory technical service and compliance support that optimizes client expenditures and manpower requirements."
• R & M Energy
  "the mission ...is to deliver the market needs of the global energy industry with a focus on the discovery and recovery segments."
• R & R Visual Inspection Services
  "offers a full range of geophysical services for all your subsurface location needs. We can visually locate everything from water tables to buried pipelines to large boulders. Plastic, metal, stone, or dirt we can find it. "
• R & W International
  "the foremost supplier of oilfield and water well equipment to the Middle East. "
• RAM Energy Inc.
  "an independent gas producer based in Tulsa, Oklahoma"
• Ramco Energy plc
  "an entrepreneurial energy and oil services company focused on oil and gas exploration and production."
• Randy Smith Drilling School
  "Our commitment ... is to provide quality training services to the oil and gas industry, as well as all related industries."
• Range Resources Corporation
• RDG Geoscience & Engineering
  "an earth science and engineering consulting company."
• RDM Industrial Electronics, Inc.
  "specializes in the repair and refurbishing of petroleum electronics and dispensing equipment."
• READ Well Services
  "provides cased hole logging services, advanced borehole seismic services, and well construction and repair for casing and tubing based on expandable tubulars techniques. "
• Rederiet Erik Hoj A/S
  "one of the leading seacontractors in the [Denmark] country."
• Reeves Exploration & Technology
  "owner of S.O.R.T."the #1 exploration technology in the oil industry"
• Refinery Automation Institute LLC
  "international energy automation consultants"
• Regent Resources Ltd.
  "a well financed privately owned resource Company engaged in the exploration for and development production and marketing of oil and natural gas in Western Canada"
• REICHdrill Inc.
  "the manufacturer of a complete line of top head rotary drive drilling equipment for use in the waterwell, oil/gas exploration, quarrying, construction, and mining industries."
• Reid Geophysics [UK]
  "Consulting in petroleum and mineral exploration and the environment"
• RepsolYPF
  "an international oil company, engaged in all activities within the hydrocarbon sector. These include the exploration, development and production of crude oil and natural gas, the transport of oil products, liquefied petroleum gas (LPG) and natural gas, oil refining, the production of a wide range of petrochemicals, and marketing of oil products and derivatives, petrochemicals, liquefied petroleum gas and natural gas."
• Resource Development Partners
  "Geoscience & Engineering Consulting Services"
• Resources Management Indonesia
  "policy has been to provide the best equipment and the highest level of management, engineering, construction, and technical expertise to clients throughout Indonesia...established itself as a leader in the Indonesian petroleum construction industry."
• ResTech
  "is a multi-discipline Reservoir Evaluation Services company specializing in the integration and interrogation of subsurface data into a coherent formation evaluation."
• Reynolds-French & Company
  "Recognized as the leader in repair of cracked or damaged castings, in field machining, in alignment,and in consultation for equipment problems."
• Rider Resources Inc.
• RigBrokers International
  "a full service broker of new / used and fully reconditioned land rig packages. RBI is a turn key supplier of land drilling rigs capable of providing complete "READY TO DRILL" drilling systems."
• RigData
  "founded in 1980 for the purpose of tracking and publishing information on oil & gas drilling activity."
• Rigmatch Information Services, Inc.
  "Search for particular operators, depths, fields, dates, etc. Find out who's been active in a particular state or field at a given time. Online, easy-to-use, and free to the public. Updated weekly with the latest information."
• Rike Service Inc.
  "consulting & Management Solutions Expressly for the Petroleum Industry"
• Rising Star Energy
  "a privately owned oil and gas company"
• Ro-Clean Desmi
  "proven oil spill technology"
• Robertson Geologging
  "covers all aspects of borehole logging including slimhole logging instrumentation, contract logging services, geophysical software, training and RG worldwide support."
• Robbins HDD
  "Horizontal directional drilling equipment"
• Roc Oil Company Limited
  "an Australian-based international oil company "
• Rock Solid Images
  "Solutions for seismic reservoir characterization"
• Rogers Oil Tool Services
• Rooney Engineering, Inc., (REI)
  "specializes in the field of petroleum transmission, storage and fiber optic communication projects."
• Rosneft Oil Company
  "owned by the State and is one of the leading corporations in the Russian fuel and energy sector."
• Rowan Companies Inc.
  " "Throughout the booms and busts that have characterized the highly cyclical contract drilling business, Rowan has been a different Breed of Cat - and proud of it."
• Rowans Consultants
  "an international E&P consultancy."
• Roxar ASA
  "a leading reservoir technology company providing innovative products and services to the upstream oil and gas industry."
• Royale Energy, Inc.
  "one of California's leading Natural Gas exploration and production companies."
• RPS Group Plc
  "Europe's leading environmental consultancy"
• R. Rindfuss Drilling
  "Geological and geotechnical well drilling, monitoring, coring, soil sampling, auger drilling"
• Running Horse Resources Inc.
  "Provide[s] Oil and Gas Exploration companies with a reliable source of experienced professional wellsite geologists"
• Ruwco Oil and Gas Corp.
  " an oil and gas operating Company"
• Ryan Energy Technologies, Inc.
  "provides complete horizontal and directional drilling services and solutions along with measurement while drilling (MWD) services for both conventional and unique drilling applications." A business unit of Nabors Industries, Ltd.
• Ryder Scott Petroleum Consultants
  "one of the largest, oldest and most respected reservoir-evaluation consulting firms in the petroleum industry. The company performs more than 1,000 consulting studies a year for oil and gas producers -- both major and independent -- investors, banks, governmental agencies and accounting and law firms."

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• Saaya Inc.
  "supplies and exports drilling equipment for oil field, geothermal, hot spring wells and water wells to overseas customers, mainly in Japan. "
• Sabeus Sensor Systems
  "provide robust fiber optic systems for use in oilfield reservoir management and seismic exploration."
• Safety Boss
  "a recognized international leader in a dangerous profession--and one of handful of senior companies delivering wild well control services around the globe."
• Safety Construction Inc.
  "provides Barge and Tug Services to the Oil & Gas Offshore Industry. We are operators and charterers of Offshore Barges, including accommodation units, Deck barges, Pipelay, Launch Barges, pontoons, incl submersibles for Dry Docking Rigs and Offshore platforms, Tugs and Offshore Service vessels, located in world wide positions. "
• Saint-Gobain Crystals-Houston
  "a global leader in the manufacture and development of engineered materials such as glass, insulation, reinforcements, containers, building materials, ceramics and plastics."
• Salisbury & Associates, Inc.   
  "Geotech Drilling at its Best! Specializing in Difficult Access Bore Holes"
• Sanjel
  "a specialized energy service company"
• Saybolt
  "a world leader in the characterization and measurement of reservoir fluids, specializing in crude oil and its derived products from reservoir to end-user. "
• Scandpower AS
  "a privately owned international consulting company"
• Schinelli Consulting [Italy]
  "Geology, geotechnics, environment, applied geophysics, non destructive testing on foundations and structures" Offering a wide range of geophysical services. Seismic refraction, seismic reflection, georadar, electromagnetic surveys, gravimetry. geophysical techniques."
• Schlumberger
  
• Schnabel Engineering
  "major service areas include not only geotechnical engineering, but environmental, water resources, geosciences, materials engineering, construction monitoring and advanced structural analysis. These services are provided regionally, nationally and overseas."
• Science Applications International Corporation (SAIC)
  "actively apply geophysical methods to resolve environmental, hydrologic, mining, and engineering problems. "
• Scientific Drilling
  "at the cutting edge of survey technology and is the only company to offer a complete range of survey services form the simplest of single shots to the most advanced continuous high accuracy inertial systems."
• The Scotia Group, Inc.
  "Domestic and International Oil and Gas Advisory Services"
• Scorpion Oil Tools
• SDI(System Development Inc.)
  "has been providing high performance, hard copy plotting and printing solutions for a wide range of industries since 1988."
• SDS Digger Tools Pty Ltd
  "SDS Down Hole Fluid Hammer Drill for drilling oil & gas wells. "
• Seacor Smit Inc.
  "and its affiliates operate one of the world's largest fleets of diversified marine support vessels primarily dedicated to supporting offshore oil and gas exploration and development in the US Gulf of Mexico, offshore West Africa, the North Sea, Mexico, the Far East and Latin America. "
• Seadrill Ltd.
  "an international offshore drilling contractor providing services within drilling and well services."
• Seidlitz Engineering Ltd.
  " a consulting engineering company that provides complete facility and production engineering services to companies in the Oil & Gas industry"
• Seismic Consultants Group Pty. Ltd. (SCG)
  "provides specialist services in seismic survey project management and seismic "
• Seismic Exchange, Inc. (SEI)
  "a full service 2D and 3D seismic data marketing firm "
• SeismicDocs
  "your Online PROFESSIONAL geophysical consulting service"
• Seistronix Exploration Seismographs
  "a manufacturer of exploration seismographs and related geophysical equipment for small to medium sized oil, gas, mineral and geotechnical surveys. Our systems are used for subsurface imaging using refraction, reflection ..."
• Senergy Ltd.
  "offers an integrated resource for the oil and gas industry with the expertise and flexibility to meet every need from reservoir evaluation through to full field development and wells performance management."
• Sensors Research Consulting, Inc.
• Servipetrol
  "established in 1981 to provide petroleum consulting services and training to companies around the world."
• Setac Chemical Corporation
  " a manufacturing and marketing company primarily providing oil and gas well drilling fluid additives."
• ShawCor Ltd.
  "a growth-oriented energy services company focusing on technology-based products and services for exploration and production, pipeline, and petrochemical and industrial markets worldwide."
• Shell Oil Company
  • Malampaya Deep Water Gas to Power Project
    
  • Shell Australia
  • Shell Brasil, S. A.
  • Deutsche Shell
  • Shell Hong Kong
  • Shell Iceland
  • Shell Malaysia
  • Shell Netherlands
  • Shell in Nigeria
  • Shell Norway, A.S.
  • Shell Pipeline Company, LP
  • Shell Switzerland
  • Shell U.S.A.
• Sigma Engineering Corp
  "focus is the evaluation, design and execution of drilling and completion operations, onshore and offshore, both domestic and international, for projects involving vertical, directional, horizontal or underbalanced operations. "
• Slickbar
  "Specialists in Top of the Line Oil Spill Clean Up and Containment Equipment"
• Smith Bits
  "Providing the customer with a single source drill bit solution"
• Smith International, Inc
  "a world leader in drilling tools and services"
• Soco International Plc
  "We are an international oil and gas exploration and production company headquartered in London and listed on the London Stock Exchange."
• Sogapro Engineering Ltd.
  "specializes in Sour Gas Project Engineering worldwide."
• Solar Tracking Japan, LTd.
  "providing spare and replacement parts procuring services to the international maritime and offshore oil drilling industry ever since. We are a small, but dedicated and nimble company, with our office in Hiroshima - Japan. " "
• The SOUND Energy Group
  "an Oil & Gas geoscience and engineering consulting company dedicated to the cost-efficient discovery and production of hydrocarbon reservoirs via the application of SOUND geoscience and engineering technology. "
• Southwestern Energy Corporation
  "focused on adding shareholder value through the discovery and production of high margin crude oil and natural gas reserves. The Company is also involved in natural gas distribution, marketing and transportation activities that enhance value and provide stability."
• Sovereign Oil & Gas Company
  "founded in March of 2000 to apply state-of-the-art petroleum exploration and extraction technology to the development of international oil and natural gas projects. "
• Spectrum Geophysics
  "specializes in the geophysical characterization of industrial, military, and urban settings."
• Sperry-Sun Drilling Services
• Spot Image
  "provides Earth observation products for such diverse applications as agriculture, cartography, cadastral mapping, environmental studies, urban planning, telecommunications, surveillance, forestry, land use/land cover mapping, natural hazard assessments, flood risk management, oil and gas exploration, geology and civil engineering."
• Sproule
  "worldwide petroleum consultants"
• SST Energy Corporation
  "provides contract-drilling services for the development of oil and natural gas and scientific purposes in the Rocky Mountain region of the United States"
• St. Mary Land & Exploration Company
  "is engaged in the exploration, development, acquisition and production of natural gas and crude oil in five core areas in the United States. "
• StatoilHydro
•  
  • Statoil Denmark
  • Statoil Norway
  • Statoil Sweden
• SRK Consulting
  "an independent, international consulting practice. SRK provides focused advice and solutions to clients, mainly from earth and water resource industries."
• Stewart Brothers Drilling Co.
  "Mining, Exploration, Environmental, Construction, Development, Abandonment Services"
• Stim-Lab
  "a Core Lab...division, is the oil and gas industry's foremost provider of a broad range of research and testing services for drilling, cementing, completion and stimulation design, additive evaluation, petrology and reservoir analysis. "
• Stoner Engineering - MakinHole.Com
  "The leader in technical hole deviation technology for the Oil & Gas Directional Drilling Industry."
• Stratagraph Inc.
  "Complete Computerized Mudlogging and Pressure Detection Services Utilizing State-Of-The-Art Data Acquisition Hardware and Software!"
• Stress Engineering Services (SES)
  "a full-service engineering consulting firm committed to technical excellence and customer service. "
• the Strickland Group Inc.
  offering reservoir engineering consulting services, including expert testimony.
• Sub Sea Sonics
  "manufactures and sells the following underwater products: underwater timed release, underwater acoustic release, underwater acoustic receiver."
• Sub Surface Tools, Inc.
  "supplying test plugs, wearbushings and retrieving tools, bop rams, spools, and adapters to a full service rental tool company with Four Locations and a complete Inventory."
• Subsurface Consultants & Associates, LLC (SCA)
  "a full service upstream petroleum consulting and training company. SCA has grown to become a world leader in petroleum exploration, development and training services. "
• Subsurface Surveys
  "specializes, with many years of experience, in geophysical data acquisition, processing and interpretation in terms of real world geology. "
• Sulzer Chemtech
  "active in the field of process engineering"
• Sun Machinery 
  "Drilling Rig Central"
• Suncor Inc.
  " a world leader in mining and extracting crude oil from the vast oil sands deposits of Northern Canada. We also explore for, develop and market conventional crude oil and natural gas in Western Canada"
• Superior Energy Services, Inc.,
  "an industry leader in providing well abandonment and related services to oil and gas drilling and exploration companies in the Gulf of Mexico."
• Sure Flow Consulting Services, Inc.
  "Abandonments, Facility Installation, Pipeline Installation, Emergency Response Planning, Drilling and Completions Supervision, Workovers and Well Servicing Supervision....provides the highest value, skilled professionasl to the oil and gas industries"
• Surtek Oil Recovery Specialists
  "Specialists in Enhanced Oil Recovery Technology and In-Situ Soil Washing"
• Swansorb
  "the environmental solution for the new millennium biodegradable oil and chemical absorbent"
• Swift Energy Company
  "is an independent oil and natural gas company engaged in the exploration, development, acquisition, and operation of oil and gas properties, with a focus on U.S. onshore natural gas reserves."
• Swiftdale
  " are one of the UK's leading Geological Consultancies who specialise in providing consultant Wellsite and Operations Geologists for Oil Companies. "
• Syncrude Canada Ltd.
  "the world's largest producer of blended crude oil from the oil sands and the largest single source of crude oil in Canada."
• Syntroleum Corporation
  "the developer and owner of the proprietary Syntroleum® Process and several related proprietary technologies for the conversion of natural gas into synthetic liquid fuels and specialty products."

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