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2022 2nd Alert Hipo#19 Chiksan loop got entangled on TDS monorail causing to snap and dropped .
The Liner cement head was picked up with the TDS in order to stab-in into pup joint which was placed at rotary table level, the chicksan joint got caught in the TDS monorail causing the Lo-torque valve connection to part and TPW (Temporary Pipe Work) assembly to fall on rig floor. No personnel injuries. The weight of TPW assembly (Lo-torque + swivel + chicksan) is 133 kg and it fell from 4m height.
Rig Manager & Driller to always assess the risk when deviating for original plan. Driller to always ensure the TDS travel path is clear from obstruction & temporary objects installed at height properly secured. Floormen to always position themselves to avoid moving objects and dropped objects. DSV, Rig Manager & Driller to always ensure effective supervision for any task. Make sure that travel path is clear from obstructions
Escalation by the change of plan (adding the extra pup-joint) led to distracted focus to perform critical check on TDS travel path. Crew present on rig floor were focusing on stabbing the cement head assembly into the pup-joint and were not attentive to the potential risk caused by TPW. Supervisors involved in the process didn’t stop the activity to perform detailed risk assessment with new TBT when deviation took place.
Category:
Second Alerts
Document Type:
Safety
Format:
pptx<br/>
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