Investigation Report
Transformer Failure Causes Total Power Loss During Well Completion
07-17-2021 10:30 G19409 AC 815 Incident >$25K Vessel Electrical System/LMRP - Other: Total Power Loss
- BSEE
- Investigation Report
- Unknown
- Electrical safetyFunctional safetyLoss of station keeping
- Dynamic positioning
- Switchgear
- Emergency response
- Upstream oil and gas
- Vessel
Summary
Investigation of a transformer failure aboard Deepwater Pontus during well completion operations. Total power loss led to vessel drift, emergency disconnection and seabed damage to the lower marine riser package. The well remained secure, with no injuries or pollution. Findings identify unmonitored breaker position and planned monitoring improvements.
Classifications: Electrical safety; electrical hazards.
Classifications: Functional safety; safety instrumented systems; SIS.
Classifications: Loss of station keeping; drive-off; drift-off.
Classifications: Dynamic positioning; DP; DP operations.
Classifications: Switchgear; switch gear.
Classifications: Emergency response; emergency preparedness.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Vessel; aboard ship; onboard vessel.