• Amerada Hess Ltd
• Amoco
• Arabian Oil
• Anadarko
• BHP Petroleum Ltd, London
• BP
• BP Amoco
• BPB Wireline Services
• British Gas
• Cairn Energy
• Canadian Occidental Petroleum Ltd
• Canadian Petroleum International
• Core Laboratories Inc
• Danop
• Drilling Engineering Association
• Drilling Inspectorate
• EDECO Petroleum Services Ltd
• Enterprise Oil Plc
• Fina Petroleum
• Hamilton Oil Company Ltd
• Health & Safety Executive
• Heriot Watt University
• Kerr-McGee
• Lasmo
|
• Loeb Aron & Company Ltd
• Maersk Olie
• Marathon Oil (UK) Ltd
• Mobil
• Nexen International
• Norsk Hydro Produksjon
• Northland Energy Services, Netherlands
• Occidental Petroleum of Qatar Ltd
• Offshore Supplies Office
• OG Gas AS
• Perenco
• Phillips
• Prodrill Ltd
• OMV
• Ramco Oil and Gas
• RDS Resource Ltd
• Saudi Aramco
• Sonarco (BP / Sonatrach)
• Sonahess
• Star Energy
• TotalFinaElf
• Venture Production
• Weber Oil
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