Investigation Report
Casing Dropped After Elevators Struck Derrick During Drilling
01-20-2020 10:00 G02638 MC 194 Injury - Required Evacuation - Crane
- BSEE
- Investigation Report
- Unknown
- Dropped objectsMechanical failureSlips, trips and falls
- DrillingLifting operations
- CraneLifting accessories
- Job safety analysisOperating and work procedures
- Upstream oil and gas
- Offshore installation
Summary
Investigation of a casing drop during drilling on the Nabors 202 rig. Single joint elevators struck the derrick A-frame and failed, releasing casing and displacing another joint. An employee tripped while moving away. Findings identify missing block-speed and overpull instructions and non-use of a crane to control the casing’s lower end.
Classifications: Dropped objects; falling objects; DROPS.
Classifications: Mechanical failure; equipment failure.
Classifications: Slips, trips and falls; same-level falls.
Classifications: Drilling; well drilling.
Classifications: Lifting operations; load lifting; hoisting.
Classifications: Crane; cranes.
Classifications: Lifting accessories; lifting gear; rigging gear.
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: Offshore installation; offshore platform; offshore rig.