Partners
 |
China State Shipbuilding Company (CSSC) |
|
Kerui Petroleum Equipment Co. Ltd. (Kerui) |
|
Liaoyang Steel & Tube Co. Ltd. (LSTC) |
|
Tamkar Gas Equipment Company (Tamkar) |
|
Strata Oilfields Services Company (Strata) |
|
DRG OIL Company Ltd. |
