Drilling rig issued with prohibition notice to prevent unsafe practice

18 October, 2019

NOPSEMA has issued a prohibition notice as a result of a serious injury on a mobile offshore drilling unit – the Ocean Monarch – operating in the Bass Strait.

The offshore energy regulator pursued enforcement action against the operator of the Ocean Monarch, the Diamond Offshore General Company (DOGC), after equipment failed during an operation to replace a drill line. The equipment fell and seriously injured a worker on the deck below.

Following an on-site inspection, NOPSEMA determined that the operation must not be undertaken again until DOGC has implemented adequate systems and work practices to remove the threat to the health and safety of employees at the facility.

NOPSEMA continues to investigate this matter and further enforcement action, if warranted, may follow.


  • occupational health & safety
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