Investigation Report
Unintended Emergency Disconnect Releases Completion Fluid During BOP Control Troubleshooting
02-19-2012 17:00 G14205 EB/602 Pollution- Other
- BSEE
- Investigation Report
- Unknown
- Environmental protectionFunctional safetyLoss of containment
- Electrical work
- Blowout preventerOperator displays and control interfaces
- Job safety analysisOperating and work proceduresPermit to workSafety communication
- Upstream oil and gas
- Offshore installation
Summary
An investigation examines an unintended emergency disconnect on ENSCO 8500 that released 849 barrels of calcium chloride completion fluid to sea. Troubleshooting live BOP control-panel wiring caused a relay voltage drop. Findings identify absent work authorisation, task risk assessment and procedures, alongside failures to communicate and follow an engineering bulletin.
Classifications: Environmental protection; environmental safety; pollution prevention.
Classifications: Functional safety; safety instrumented systems; SIS.
Classifications: Loss of containment; containment loss.
Classifications: Electrical work; electrical maintenance.
Classifications: Blowout preventer; BOP; blow-out preventer.
Classifications: Operator displays and control interfaces.
Classifications: Job safety analysis; JSA; job hazard analysis; JHA.
Classifications: Operating and work procedures.
Classifications: Permit to work; PTW; work permit.
Classifications: Safety communication; toolbox talk; toolbox talks.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Offshore installation; offshore platform; offshore rig.