Safety Alert
Drawworks Parking Brake Failure
Drawworks Parking Brake Failure
- BSEE
- Safety Alert
- BSEE Safety Alert 425
- Machinery and Equipment
- Mechanical failure
- DrillingInspection and maintenance
- Valve
- Functional testingPreventive maintenance
- Upstream oil and gas
Summary
Repeated drawworks parking brake failures culminated in identification of leaking pneumatic circuit components after earlier repairs and successful tests. One failure allowed the travelling block to descend 5 feet, damaging drill pipe. BSEE recommends considering pressure-based engagement checks, additional indicators, component testing and replacement frequencies, and preventive maintenance of the rig air supply.
Classifications: Mechanical failure; equipment failure.
Classifications: Drilling; well drilling.
Classifications: Inspection and maintenance; asset inspection; equipment maintenance.
Classifications: Valve; valves.
Classifications: Functional testing; function test.
Classifications: Preventive maintenance; preventative maintenance; planned maintenance.
Classifications: Upstream oil and gas; oil and gas extraction; upstream petroleum.
BSEE Safety Alert 425. Themes: machinery and equipment.