Investigation Report
Riser Joint Dropped During Drillship Crane Operations
12-03-2021 13:00 G35313 MC 82 Crane
- BSEE
- Investigation Report
- Unknown
- Dropped objectsHuman factorsMechanical failure
- Lifting operations
- CraneLifting accessoriesValve
- Competence and trainingJob safety analysisOperating and work procedures
- Upstream oil and gas
- Vessel
Summary
BSEE investigates a dropped riser joint during crane operations aboard the Diamond Ocean Blackhawk drillship. A worn hydraulic valve falsely indicated latch engagement, allowing an unsafe lift. Findings identify incomplete procedures and hazard analysis, inadequate flagger training, and unreliable visual latch indicators. The district made no recommendations at that time.
Classifications: Dropped objects; falling objects; DROPS.
Classifications: Human factors; human performance; ergonomics.
Classifications: Mechanical failure; equipment failure.
Classifications: Lifting operations; load lifting; hoisting.
Classifications: Crane; cranes.
Classifications: Lifting accessories; lifting gear; rigging gear.
Classifications: Valve; valves.
Classifications: Competence and training; competency assurance; safety training.
Classifications: Job safety analysis; JSA; job hazard analysis; JHA.
Classifications: Operating and work procedures.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Vessel; aboard ship; onboard vessel.