| AGIP |
|
AMERADA HESS |
| AOC |
|
APEX-INDO |
| ARABIAN DRILLINC COMPANY |
|
CONOCO |
| COPAREX |
|
DEUTAG |
| ENERGY AFRICA |
|
ESSO REP |
| GAZ DE FRANCE |
|
HALLIBURTON |
| JAPAN DRILLING COMPANY |
|
KUFPEC |
| MAERSK |
|
MOBIL |
| NABORS |
|
NDSC |
| OMV |
|
PDO |
| PERENCO |
|
RWE-DEA |
| SAIPEM |
|
SCHLUMBERGER |
| SHELL |
|
SINCOR |
| TOTAL |
|
TPS |
| TRANSOCEAN |
|
VERMILION REP |
|