Investigation Report
Seadrill – West Bollsta – investigation of incident with dropped riser joint
Seadrill – West Bollsta – investigation of incident with dropped riser joint
- Havtil
- Investigation Report
- Unknown
- Dropped objectsHuman factorsLearning from incidentsRisk management
- DrillingLifting operations
- Lifting accessoriesOperator displays and control interfaces
- Competence and trainingExclusion zonesOperating and work proceduresPositive retention and reliable securing
- Upstream oil and gas
- Offshore installation
Summary
Investigation of a riser joint dropped during lifting on West Bollsta in the Barents Sea. It examines hydraulic running-tool retention, unreliable lock indication, operating instructions, risk assessment and equipment-specific training. Technical, organisational and operational conditions contributed, but investigators could not establish a clear cause or confirm the proposed theories.
Classifications: Dropped objects; falling objects; DROPS.
Classifications: Human factors; human performance; ergonomics.
Classifications: Learning from incidents; incident learning; lessons learnt; lessons learned.
Classifications: Risk management; risk evaluation.
Classifications: Drilling; well drilling.
Classifications: Lifting operations; load lifting; hoisting.
Classifications: Lifting accessories; lifting gear; rigging gear.
Classifications: Operator displays and control interfaces.
Classifications: Competence and training; competency assurance; safety training.
Classifications: Exclusion zones; red zones; restricted access zones.
Classifications: Operating and work procedures.
Classifications: Positive retention and reliable securing.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Offshore installation; offshore platform; offshore rig.