Investigation Report
Subsea Flowline Gas Release During Replacement Control Module Testing
12-02-2024 0830 G06898 VK 989 Incident >25K, Shutdown From Gas Release
- BSEE
- Investigation Report
- Unknown
- Hydrocarbon releasePressure systems
- Inspection and maintenancePressure testingROV operations
- Process pipework and pipelines
- Energy and process isolation
- Upstream oil and gas
- Offshore installationSubsea
Summary
Investigation of a subsea flowline gas release during testing of a replacement control module at Viosca Knoll 989 A. An ROV located bubbles at a bend; testing stopped and the pipeline was isolated. Talos suspected a previous field repair and possible corrosion, but the exact cause remained undetermined pending inspection and testing.
Classifications: Hydrocarbon release; hydrocarbon leak; oil and gas release.
Classifications: Pressure systems; stored pressure; pressurised systems; pressurized systems.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Pressure testing; hydrostatic testing; pneumatic testing.
Classifications: ROV operations; remotely operated vehicle operations.
Classifications: Process pipework and pipelines; process piping.
Classifications: Energy and process isolation; isolation; energy isolation.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Offshore installation; offshore platform; offshore rig.
Classifications: Subsea; underwater worksite.