It said the Atwood Osprey (built 2011) parted several mooring lines and drifted about three nautical miles from its original position.

The US drilling contractor said the rig had been caught up in Cyclone Olwyn, which hit the northwest coast of Australia on 12 March.

“The rig is currently stable with a support vessel in position, and preliminary results indicate minimal damage with an estimated maximum of 30 days out of service time for repairs,” Atwood said.

“The