Investigation Report
Synthetic-Base Mud Discharge from Drill Ship into Sea
07-02-2015 04:00 G18194 MC 126 Pollution
- BSEE
- Investigation Report
- Unknown
- Environmental protectionHydrocarbon releaseLoss of containment
- Fluid transferPressure testing
- Storage tanksValve
- Lockout and tagoutRisk assessmentSimultaneous operations coordination
- Upstream oil and gas
- Marine watersVessel
Summary
Investigation of a 368-barrel synthetic-base mud discharge from the Rowan Relentless drill ship into Gulf of Mexico waters. The report identifies poor communication, unverified valve alignment and a half-open splitter valve, alongside inadequate pit monitoring, simultaneous fluid operations and unlocked dump valves. No recommendations to the Agency were made.
Classifications: Environmental protection; environmental safety; pollution prevention.
Classifications: Hydrocarbon release; hydrocarbon leak; oil and gas release.
Classifications: Loss of containment; containment loss.
Classifications: Fluid transfer; fluid loading; fluid offloading.
Classifications: Pressure testing; hydrostatic testing; pneumatic testing.
Classifications: Storage tanks; atmospheric tanks.
Classifications: Valve; valves.
Classifications: Lockout and tagout; LOTO; lockout/tagout.
Classifications: Risk assessment; hazard assessment.
Classifications: Simultaneous operations coordination; SIMOPS; simultaneous operations.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Marine waters.
Classifications: Vessel; aboard ship; onboard vessel.