Investigation Report
Subsea Chemical Leaks Discovered During ROV Survey
04-30-2018 22:30 G10437 DC 4 Pollution - Chemical leak in flying lead
- BSEE
- Investigation Report
- Unknown
- Environmental protectionHazardous substancesLoss of containmentMechanical failurePressure systems
- Inspection and maintenanceROV operations
- HoseRemotely operated vehicleValve
- Alarm managementCompetence and trainingEnergy and process isolationOperating and work procedures
- Upstream oil and gas
- Subsea
Summary
BSEE investigates two subsea chemical leaks associated with the De Soto Canyon 4 well, discovered during an ROV survey. The report examines hose-jacket damage, loss of collapse resistance and failure to maintain positive pressure. It discusses uncertain discharge estimates, isolation and repair, and proposed procedural, training, check-valve and low-pressure alarm measures.
Classifications: Environmental protection; environmental safety; pollution prevention.
Classifications: Hazardous substances; hazardous chemicals; chemical exposure.
Classifications: Loss of containment; containment loss.
Classifications: Mechanical failure; equipment failure.
Classifications: Pressure systems; stored pressure; pressurised systems; pressurized systems.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: ROV operations; remotely operated vehicle operations.
Classifications: Hose; flexible hose.
Classifications: Remotely operated vehicle; ROV; underwater robot.
Classifications: Valve; valves.
Classifications: Alarm management.
Classifications: Competence and training; competency assurance; safety training.
Classifications: Energy and process isolation; isolation; energy isolation.
Classifications: Operating and work procedures.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Subsea; underwater worksite.