OREANDA-NEWS. Atwood Oceanics, Inc. (NYSE: ATW) announced today that its semisubmersible drilling unit, the Atwood Osprey, parted several mooring lines and drifted approximately three nautical miles from its original position during Cyclone Olwyn, which impacted the northwest coast of Australia on March 12th.  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.  No rig personnel were injured in the event. The Atwood Osprey is contracted to Chevron Australia Pty. Ltd. and was on location at the Iago 1B well.  The well had been shut down and secured in accordance with Chevron's cyclone demobilization procedures and the rig had ballasted down and evacuated all its rig personnel in advance of the cyclone. Atwood Oceanics is coordinating its efforts with Chevron, the Australian offshore regulator (NOPSEMA) and other affected parties. Atwood Oceanics, Inc. is a leading offshore drilling contractor engaged in the drilling and completion of exploratory and developmental wells for the global oil and gas industry. The company currently owns 12 mobile offshore drilling units and is constructing two ultra-deepwater drillships. The company was founded in 1968 and is headquartered in Houston, Texas.  Atwood Oceanics, Inc. common stock is traded on the New York Stock Exchange under the symbol "ATW."