In May 2011, Sevan Drilling entered into contracts with COSCO for the construction of two UDW drilling rigs, Sevan UDW3 and Sevan UDW4, based on the same design as Sevan Driller and Sevan Brasil. Sevan UDW4 is to be delivered in the second quarter of 2014. The total all-in turnkey price under the construction contracts is USD 526 million per rig. Payment terms require a 20% down payment which has been made upon execution of the contracts and the remaining 80% is to be paid upon delivery of the rigs.
Design: Sevan 650 Building year: 2013 and 2014 Yards: Cosco Shipyard, China Water depth 3,000 m (10,000 ft, upgradable to 12,000 ft) Drilling depth 12,000 m (40,000 ft) LOA (Length) 86 m Breadth 75 m (at waterline) Depth 24.5 m Displacement 55,800 mT at 12.5m draft Variable deck load 20,000 mT Diesel generators 8 x 5,535 kW Thrusters 8 x 3,800 kW Station keeping DP3 Living quarters 150 persons Helicopter deck Sikorsky S92 and S-61N, Superpuma AS332L2, EC225 and EH-101 Deck cranes 2 ea, max capacity: 100 mt at 15 m Oil storage 150,000 bbl Mud storage 2,850 m3 Transit speed 7-9 knots Deck area 5,700 m2 Riser tensioning system DAT - 3,200 kips Drilling lifting capacity 1,000 ton Set back load 1,000 mT Type Parallel operations. Independent handling of BOP and X-mas trees Hook load, main/aux 908 mT BOP 18 3/4", 15,000 psi, 5-6 rams (upgradeable to 7) Mud pumps 4 x 2,200 hp, 7,500 psi