Alert 05 – 31 Dropped Stand of Drill Collars Results in Near Miss
WHAT HAPPENED:
While Pulling Out Of the Hole with the Bottom Hole Assembly, one stand 9.5” drill collar fell across the derrick due to improper securing of the air winch chain on the monkey board. The derrick man tightened the chain around the drill collar with only one wrap instead of two wraps, and he didn’t make a knot as supposed to be, so the chain came loose and the stand of the DC fell across the derrick. Luckily no injuries occurred to personnel or damage in the rig floor area.