Investigation Report
Uncontrolled Travelling-Block and Top-Drive Descent During Drill-Pipe Handling
06-09-2014 16:35 G15565 GC 248 Other Lifting Device / Drawworks System / Equipment Failure / Human Error
- BSEE
- Investigation Report
- Unknown
- Dropped objectsHuman factorsMechanical failure
- DrillingInspection and maintenance
- PumpsValve
- Functional testingSafety communication
- Upstream oil and gas
Summary
BSEE investigates an uncontrolled travelling-block and top-drive descent during drill-pipe handling on Deepwater Nautilus, with two subsequent troubleshooting incidents. Findings examine misunderstood brake-status communication, resets without investigating alarms, sticking hydraulic solenoid valves and an incorrectly installed pump. The initial incident damaged equipment without reported injuries or pollution.
Classifications: Dropped objects; falling objects; DROPS.
Classifications: Human factors; human performance; ergonomics.
Classifications: Mechanical failure; equipment failure.
Classifications: Drilling; well drilling.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Pumps.
Classifications: Valve; valves.
Classifications: Functional testing; function test.
Classifications: Safety communication; toolbox talk; toolbox talks.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.