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2019 Second Alert HiPo#74 Dropped lifting sub
While making up 12 1/4" bit, to near bit stabilizer with a double of 8-1/4” drill collars, lifting sub at elevators unscrewed from connection to 8 1/4'' drill collar and BHA(Bottom hole assembly) fell down to ground in Cat walk Area.
TP or NTP MUST be available at rig floor while making up BHA

Category:Second AlertsDocument Type:Safety
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