said a moored semisubmersible unit, the Deepwater Nautilus, was adrift in the Gulf of Mexico after Hurricane Katrina swept through the area.
The rig's current location is being monitored remotely by a transponder beacon on the unit. The company said all of its personnel had already been evacuated and that the well was secured before the storm arrived. The U.S. Coast Guard has been notified.
Three other Transocean moored vessels were evacuated and haven't moved in the aftermath of the storm. Transocean, an offshore drilling contractor based in Houston, said it plans to visit the moored vessels and assess their condition.
Shares of Transocean were down 22 cents to $56.03.