Rig: | Petromar V Drillship |
Date: | 27 Aug 1981 |
Location: | Off Natuna Island, South China Sea |
Operator: | Mobil |
Summary
The Petromar V drillship was drilling in the South China Sea when it encountered a shallow gas pocket. The well suffered an uncontrolled sub-sea blowout which eventually caused the capsize of the drill-ship. Several factors have been quoted as contributing to the incident, including the failure of the diverter and improper rig selection. No further details of the incident.
Sources:
Scherrer Institut: Severe Accidents in the Energy Sector 
Offshore Oil and Gas: Technology Update
John Wright Company: Shallow Gas Blowouts
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