Mubadala Petroleum, a wholly-owned subsidiary of UAE-based Mubadala Development, has awarded a drilling services contract for the Atwood Orca platform to Atwood Oceanics.

The Atwood Orca is being constructed at PPL Shipyard in Singapore. It is expected to have a rated water depth of 400ft, 1.5 million pound hook load capacity, and accommodation for 150 staff.

The facility is slated to be delivered from the PPL shipyard in early May 2013, ahead of its scheduled delivery deadline in June 2013.

The latest two-year contract adds $116m in revenue backlog, bringing Atwood’s total revenue backlog to nearly $2.6bn as of 22 January 2013.

US-based offshore drilling contractor Atwood Oceanics currently owns 12 mobile offshore drilling units. The firm is constructing three ultra-deepwater drillships and one high-specification jackup.