Investigation Report
Rotating Derrick Bails and Elevator Struck Contractor During Drilling
04-30-2012 07:50 G07957 MC/762 LTA>3 Days/Compound Fracture
- BSEE
- Investigation Report
- Unknown
- Line of fireMechanical failure
- Drilling
- Rotating machinery
- Exclusion zones
- Upstream oil and gas
Read at BSEEOpens the document on bsee.gov
Summary
A contractor suffered a compound elbow fracture when malfunctioning cycling gear caused an automated derrick’s bails and elevator to rotate and strike him during drilling. The investigation identified gear malfunction as the probable cause and inadequate no-go-zone width as a contributing factor. BSEE made no recommendations to the Agency.
Classifications: Line of fire; struck-by hazards.
Classifications: Mechanical failure; equipment failure.
Classifications: Drilling; well drilling.
Classifications: Rotating machinery; rotating equipment.
Classifications: Exclusion zones; red zones; restricted access zones.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.