| Alpha Aurora Company                                        |   | Cayman Islands | 100% |
|------------------------------------------------------------------|--------|----------------|------|
| Alpha Falcon Company                                        |   | Cayman Islands | 100% |
| Alpha Falcon Drilling Company                               |   | Cayman Islands | 100% |
| Alpha Leasing Drilling Limited                              |   | Mauritius      | 100% |
| Alpha Offshore Drilling (Cambodia) Ltd.                     |   | Cambodia       | 100% |
| Alpha Offshore Drilling (S) Pte. Ltd.                       |   | Singapore      | 100% |
| Alpha Offshore Drilling Services Company                    |   | Cayman Islands | 100% |
| Alpha Offshore Drilling Services Company – Free Zone  |   | Egypt          | 100% |
| Alpha Offshore Drilling Services Company – Ghana      |   | Ghana          | 100% |
| ATW Management, Inc.                                        |   | Delaware       | 100% |
| Atwood Deep Seas, Ltd. (Partnership)                        |   | Texas          | 100% |
| Atwood Drilling, Inc.                                       |   | Delaware       | 100% |
| Atwood Hunter Co.                                           |   | Delaware       | 100% |
| Atwood Management, Inc.                                     |   | Delaware       | 100% |
| Atwood Oceanics Australia Pty. Ltd.                         |   | Australia      | 100% |
| Atwood Oceanics Australia Superannuation Fund Pty. Ltd.     |   | Australia      | 100% |
| Atwood Oceanics Drilling Pty. Ltd.                          |   | Australia      | 100% |
| Atwood Oceanics International Limited                       |   | Cayman Islands | 100% |
| Atwood Oceanics Leasing Ltd.                                |   | Malaysia       | 100% |
| Atwood Oceanics (M) Sdn. Bhd.                               |   | Malaysia       | 100% |
| Atwood Oceanics Malta Ltd                                   |   | Malta          | 100% |
| Atwood Oceanics Management, L.P. (Partnership)              |   | Delaware       | 100% |
| Atwood Oceanics (NZ) Limited                                |   | New Zealand    | 100% |
| Atwood Oceanics Pacific Limited                             |   | Cayman Islands | 100% |
| Atwood Oceanics Platforms Pty. Ltd.                         |   | Australia      | 100% |
| Atwood Oceanics Services Pty. Ltd.                          |   | Australia      | 100% |
| Atwood Oceanics West Tuna Pty. Ltd.                         |   | Australia      | 100% |
| Atwood Offshore Drilling Ltd.                               |   | Hong Kong      | 100% |
| Aurora Offshore Services GmbH                               |   | Germany        | 100% |
| Clearways Offshore Drilling Sdn. Bhd.                       |   | Malaysia       | 49%  |
| Drillquest (M) Sdn. Bhd.                                    |   | Malaysia       | 100% |

----

| Drillquest International Offshore Drilling Services Company  |   |  Cayman Islands |  100% |
|-------------------------------------------------------------------|--------|----------------------|------------|
| Drillquest Offshore Company                                  |   | Cayman Islands       | 100%       |
| Pacific Offshore Labor Company                               |   | Cayman Islands       | 100%       |

| PT Alpha Offshore Drilling                     |   | Indonesia      | 100% |
|-----------------------------------------------------|--------|----------------|------|
| PT Pentawood Offshore Drilling                 |   | Indonesia      | 80%  |
| Swiftdrill, Inc.                               |   | Cayman Islands | 100% |
| Swiftdrill Malta (Partnership)                 |   | Malta          | 100% |
| Swiftdrill Nigeria Limited                     |   | Nigeria        | 60%  |
| Swiftdrill Offshore Drilling Services Company  |   | Cayman Islands | 100% |