Petroleum and gas safety information bulletin no. 12 | 07 October 2020 | Version 1.0
The floor hand had connected the bushing pullers to the driller's side winch line and was moving the hooks into position by holding the chains. As the driller winched up, the winch line became taut under the load and then released suddenly causing the winch line, chains and hooks to whip upwards uncontrollably. During this uncontrolled movement of the winch line the chain struck the hand of the floor hand causing injury.
The swivel joint connecting the winch line to the chains became snagged on a protruding 13 inch x 3/4 running thread on the Top Drive slide adjustment. As tension was placed on the winch line the thread bent in an upwards directions allowing the swivel joint to suddenly release and the winch line, chains and hooks whipped in an upwards direction uncontrollably.
Queensland Legislation:
Current Queensland Legislation at:
https://www.legislation.qld.gov.au/browse/force
Contact the Inspectorate:
Contact: Don Harris, Principal Inspector- Drilling , 07 4531 8521 gassafe@rshq.qld.gov.au
Issued by Resources Safety & Health Queensland
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All information on this page (Uncontrolled movement of winch line - https://www.rshq.qld.gov.au/safety-notices/petroleum-and-gas/uncontrolled-movement-of-winch-line) is correct as of time of printing (Apr 27, 2024 5:43 am).