Investigation Report
Uncontrolled Travelling-Block Descent During Casing Running
06-16-2008 07:16 G20084 GC/653 Structural Damage - Other Lifting Device - TDS/Block
- BSEE
- Investigation Report
- Unknown
- Functional safetyMechanical failure
- DrillingInspection and maintenance
- Rotating machineryWire rope
- Alarm managementFunctional testingOperating and work proceduresSafety communication
- Upstream oil and gas
- Offshore installation
Summary
An investigation examines uncontrolled travelling-block descent during casing running on GSF Development Driller I. Motor connection faults, delayed slip detection and limitations in emergency braking are described. The block reached the cleared rig floor without injuries or pollution. Corrective actions included revised brake logic, shorter delays and motor torque checks.
Classifications: Functional safety; safety instrumented systems; SIS.
Classifications: Mechanical failure; equipment failure.
Classifications: Drilling; well drilling.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Rotating machinery; rotating equipment.
Classifications: Wire rope; steel wire rope.
Classifications: Alarm management.
Classifications: Functional testing; function test.
Classifications: Operating and work procedures.
Classifications: Safety communication; toolbox talk; toolbox talks.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
Classifications: Offshore installation; offshore platform; offshore rig.