Investigation Report
Stored Pressure Propels Components into Mechanic During Pulsation Dampener Maintenance
05-15-2026 0930 G27277 MC 503 Required Evacuation, LTA (>3 days), Other (Pressure Release)
- BSEE
- Investigation Report
- Unknown
- Line of firePressure systems
- Inspection and maintenanceManual handling
- Pressure vessel
- Energy and process isolationOperating and work proceduresRisk assessmentSafety communication
Summary
Investigation of a mechanic’s injuries during pulsation dampener maintenance aboard Seadrill West Neptune. Removing the final retaining bolt released approximately 2,000 psi of stored pressure, propelling components into the mechanic. Findings address inadequate planning, unavailable manufacturer instructions, failures in pressure verification and hazard communication, and single-person handling beyond company limits.
Classifications: Line of fire; struck-by hazards.
Classifications: Pressure systems; stored pressure; pressurised systems; pressurized systems.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Manual handling; manual lifting.
Classifications: Pressure vessel; pressure vessels.
Classifications: Energy and process isolation; isolation; energy isolation.
Classifications: Operating and work procedures.
Classifications: Risk assessment; hazard assessment.
Classifications: Safety communication; toolbox talk; toolbox talks.