Investigation Report
Telescopic-Joint Seal Failure Released Synthetic-Base Mud During Drill-Pipe Withdrawal
06-20-2015 14:05 G16647 MC 772 Pollution - Spill
- BSEE
- Investigation Report
- Unknown
- Environmental protectionLoss of containmentMechanical failure
- Drilling
- Alarm managementPreventive maintenance
- Upstream oil and gas
- Marine watersOffshore installation
Summary
An investigation examines a 12-barrel synthetic-base mud discharge during drill-pipe withdrawal on Ensco 8500. The upper telescopic-joint seal failed, while its audible alarm remained inactive because air pressure stayed within operating range. Engaging the lower seal stopped the release; the reason for the upper seal failure remained unknown.
Classifications: Environmental protection; environmental safety; pollution prevention.
Classifications: Loss of containment; containment loss.
Classifications: Mechanical failure; equipment failure.
Classifications: Drilling; well drilling.
Classifications: Alarm management.
Classifications: Preventive maintenance; preventative maintenance; planned maintenance.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Marine waters.
Classifications: Offshore installation; offshore platform; offshore rig.