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HSE Policy
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2022 2nd Alert Hipo#05 Uncontrolled descend of travelling block.
On 15th January 2022 at 9:03 AM. While pulling out fishing assembly and at the last joint of 4.3/4" drill collar, Driller picked the traveling block to approximately 3 meters height and activated the parking brake. Floor hands were tie-back manual tong and prepare for next operation, the traveling block start to descend until the elevator reached the rig floor and floor saver activated. No injuries or equipment damage.
Operator shall apply emergency brake any time operation is stopped. Operator should focus on crew and equipment while people working in red zone. PMS (Work order) should cover the servicing/change out of air operated braking system directional valve on driller consol. Operator shall apply emergency brake any time operation is stopped.
Driller applied parking brake and confirmed pressure was zero then moved away from drillers panel. Driller and floor hands did not notice that the traveling block descending. Internal leak on the directional valve resulted to release the parking brake. Floor saver activated with delay.
Category:
Second Alerts
Document Type:
Safety
Format:
pptx<br/>
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