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2025 Second Alert HiPo#21 Drop object
While making up a connection of 4 ½” EUE GRE WI tubing, the locking pin device of the travelling block swivel (weighing approximately 5.5 kg) detached unintentionally from its profile and fell from a height of approximately 13 meters. The pin landed on the rig floor between crew members before continuing to bounce and slide through the V-door. The expectation was the RIH activity is completed with the travelling block swivel lock pin remaining secured in position by 3 locking bolts
How do you verify inspections on potential dropped objects, such as travelling block swivel locking pin, is carried out and recorded? How do you ensure that all Work Crew are aware and conduct effective inspections? What process do you have to ensure those items, including OEM components, requiring secondary retention is in place and periodically inspected via the Hoist/Rig Drops register?
The primary securing bolts (3 Allen bolts) of swivel locking pin were found loose, leading to disengagement. Visual inspection conducted, but no physical verification of bolt tightness performed; OEM did not recommend this. Design limitation of travelling block prevented visual verification of torque/tightness securing bolts during inspection. Secondary retention requirement not identified during OEM design. Swivel lock pin detached during jarring/fishing operations, indicating inadequate securing under dynamic loads.
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Second Alerts
Document Type:
Safety
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