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2025 Second Alert HiPo#16 Pulling Out of Hole
Prior to starting Pulling Out Of Hole (POOH), the Floorman observed the power tong dies required replacement. In response, the Driller engaged the main brake, by utilizing the brake handle, and exited the Driller’s Cabin to supervise the work. However, the mechanical lock on the handle or parking brake was applied. While exiting the Cabin, the Driller inadvertently moved the chair which came into contact with brake handle. This caused the handle to shift upward to "no brake" position. As a result, the Block began descending slowly and made contact with the string suspended in the air slips and with rig floor.
What process do you have in place to ensure the main brake, controlling the Block, is ‘parked’ before leaving the Driller’s Cabin? How do you know your Work Crew are aware of all safety critical devices on the equipment they are responsible for using? If safety critical equipment is not functioning correctly, does the Work Crew know how to address this type of situation? How do you check the competency of Maintenance staff who are responsible for maintaining safety critical equipment?
The brake handle in the Driller’s Cabin was left unsecured and was inadvertently moved to the “no brake” position prior to leaving the Cabin. The “floor saver” safety device, used to prevent the Block contacting the rig floor, was shut down as the system was triggering the floor saver before the Block reached the required height, thus obstructing smooth operating of the Block up and down. The Maintenance Team did not have adequate competency to calibrate the new Encoder used on the “floor saver” device. Inadequate implementation of the daily verification checks


Category:	Second Alerts	Document Type:	Safety
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