Bermuda-headquartered offshore drilling contractor Seadrill and U.S.-headquartered LLOG Exploration Company (LLOG), a subsidiary of London-listed oil & gas company Harbour Energy, have expanded their more than decade-long collaboration with contract awards for two ultra-deepwater drillships.

The West Neptune drillship was awarded a 365-day contract extension, with operations to begin in September, while West Vela was awarded a program with a duration of 270 days, with an expected commencement in August, for deployment in the U.S. Gulf.