Clients who have used this service include:
Anadarko Petroleum
BG International
BHP Petroleum
Burlington Resources
Devon Petroleum
Cairn
Centrica
CNR
EnCana
Enterprise Oil
EOG Resources
Fina Exploration Ltd
Hardy Oil and Gas plc
Intrepid Energy
Kerr-McGee
Marathon Oil
OGP
Powergen North Sea
Premier Oil
SOCO International plc
Tullow Oil
Zakum Development Company (ZADCO)