Potential serious injury was avoided because an offshore worker had hold of a cement hose when his carabiner failed. The carabiner was not properly checked before use and was not included in the maintenance regime, says Australia’s National Offshore Petroleum Safety Authority, NOPSA. Dirt in the carabiner seems to have cause the failure.
Says NOPSA: “On a semi-submersible drilling rig, the drill crew had completed rigging up for a cement job. After pressure testing the cement line, a crew member was required to open the low-torque valve. The valve was located at a height of seven metres above the rig floor and could only be accessed by using a tugger and man-riding harness.
With the assistance of a roustabout, the person in the man-riding harness connected to the wire rope from the man-riding tugger using a carabiner. Another crew member then operated the tugger to raise the man-rider up to the height of the low-torque valve.