Investigation Report
Choke Hose Disconnection Released Synthetic-Base Mud During Testing and Flushing
02-26-2008 19:00 G17406 GB/667 Pollution - Other
- BSEE
- Investigation Report
- Unknown
- Environmental protectionLoss of containmentMechanical failure
- Inspection and maintenancePressure testing
- Hose
- Operating and work proceduresPositive retention and reliable securing
- Upstream oil and gas
Summary
An investigation examines a choke hose disconnection during testing and flushing on Ocean Star. A missing retaining pin allowed the main securing pin to disengage, releasing approximately 80 barrels of synthetic-base mud into the moon pool without recovery. The reason for the missing pin remained unknown; inspection frequency changed from weekly to daily.
Classifications: Environmental protection; environmental safety; pollution prevention.
Classifications: Loss of containment; containment loss.
Classifications: Mechanical failure; equipment failure.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Pressure testing; hydrostatic testing; pneumatic testing.
Classifications: Hose; flexible hose.
Classifications: Operating and work procedures.
Classifications: Positive retention and reliable securing.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.