Investigation Report
02 - 17 - 2016 17:15 G14224 GB 216 Pollution
02 - 17 - 2016 17:15 G14224 GB 216 Pollution
- BSEE
- Investigation Report
- Unknown
- Environmental protectionLoss of containmentPressure systems
- Pressure testingROV operationsWell abandonment
- Remotely operated vehicleValve
- Energy and process isolation
- Upstream oil and gas
- Marine watersOffshore installationSubsea
Summary
Investigates a zinc bromide release during permanent well abandonment at Garden Banks Block 216. Hess estimated 22 barrels entered offshore waters. Subsea vent safety valves left open were identified as the probable cause, with incomplete procedures and drawings possible contributors. An ROV required a different tool to close the valves fully.
Classifications: Environmental protection; environmental safety; pollution prevention.
Classifications: Loss of containment; containment loss.
Classifications: Pressure systems; stored pressure; pressurised systems; pressurized systems.
Classifications: Pressure testing; hydrostatic testing; pneumatic testing.
Classifications: ROV operations; remotely operated vehicle operations.
Classifications: Well abandonment; plug and abandonment; P&A.
Classifications: Remotely operated vehicle; ROV; underwater robot.
Classifications: Valve; valves.
Classifications: Energy and process isolation; isolation; energy isolation.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Marine waters.
Classifications: Offshore installation; offshore platform; offshore rig.
Classifications: Subsea; underwater worksite.