During recent reeving drilling line operation using the Lewis Snake Grip the snake grip slipped (when the snake was 75 ft away fr the drum) causing the 1 5/8"
drilling line pulled backwards over the Fast line sheave and falling (from approx 160 ft) on the drill floor shattering the drillers doghouse window. Despite following the OEM procedure and with the tension on the snake grip 1/4 of the rating it still slipped. Checking IADC data for similar incidents (there were 2 reported) most of them were due to not following the recommended procedure.
Question to the community: what type of grip do your respective rig contractor use when reeving drilling line on the rig.