Clients
| Shell | Texaco |
| Amerada Hess | ARCO |
| OMV | Enterprise Oil |
| Dragon Oil | Nimir Petroleum |
| BHP Billiton | Monument Oil & Gas |
| Premier Oil | JKX Oil & Gas |
| Marathon Oil | Hardy Oil & Gas |
| Paladin Resources | PanOcean |
| Sumitomo | Sipetrol |
| Perenco | Gulf Canada |
| PetroCanada | Tullow Oil |
| Harvest Natural Resources | Pioneer Natural Resources |
| EOG Resources | SOCO International |
| Ferrexpo Petroleum | Heritage Oil |
| Falkland Oil & Gas | Petroceltic |
| Petrofac | New Age |
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