Investigation Report
Vessel Allision During Pipeline Riser Decommissioning
02-02-2020 12:30 G12142 EW 921 Structural damage - Crane - Incident >$25K
- BSEE
- Investigation Report
- Unknown
- Loss of station keepingVessel collision
- DecommissioningLifting operationsRigging
- CraneLifting accessoriesProcess pipework and pipelinesWinchWire rope
- Exclusion zonesLifting plan
- Upstream oil and gas
- Offshore installationVessel
Summary
Investigation of a vessel allision during pipeline-riser decommissioning at Ewing Banks 921 A. The account examines unexpected winch payout, a wedged shackle and severed hold-back cable. Vessel bollard pull was insufficient and had not been checked against lift calculations. Damage affected the platform and vessel crane.
Classifications: Loss of station keeping; drive-off; drift-off.
Classifications: Vessel collision; ship collision; marine allision.
Classifications: Decommissioning; facility dismantling.
Classifications: Lifting operations; load lifting; hoisting.
Classifications: Rigging; slinging.
Classifications: Crane; cranes.
Classifications: Lifting accessories; lifting gear; rigging gear.
Classifications: Process pipework and pipelines; process piping.
Classifications: Winch; winches.
Classifications: Wire rope; steel wire rope.
Classifications: Exclusion zones; red zones; restricted access zones.
Classifications: Lifting plan; lift planning.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Offshore installation; offshore platform; offshore rig.
Classifications: Vessel; aboard ship; onboard vessel.