Alert 10 – 13 Failure to Secure Sling Results in Dropped Object
The rig had been going into the hole with 5″ drill pipe and the driller was washing down the last stand of drill pipe. During this process a wire rope sling dropped from derrick-board to rig floor (about 26 m [85 feet]). The sling had been used to secure a snatch block to the derrick board handrail and it appeared that derrickman decided to take the snatch block off but he did not secure the wire rope to the derrick or snatch block. This allowed the wire rope sling to drop to the rig floor.