Wärtsilä and Kongsberg Maritime have been contracted to supply the power, positioning, and automation systems for two new drilling rigs ordered by Songa Offshore AS, the Norwegian arm of the Cyprus-based offshore drilling company. These so called cat D semi-submersible rigs are tailor designed for use by Statoil in mid-water segments, and are being built at the Daewoo Shipbuilding and Marine Engineering Co.Ltd (DSME) shipyard in South Korea.
“The proven reliability and superior efficiency of the Wärtsilä propulsion solutions were the major factors in the award of this contract. Calculating the average load profile for deepwater drilling rigs, the efficiency is approximately three per cent better than those offered by competitors. The high efficiency enables fuel cost savings and has also clear benefits in terms of reducing carbon dioxide emissions (CO2). Furthermore, the local Wärtsilä service network in Norway will provide full support for the equipment,” says Magnus Miemois, Vice President at Wärtsilä Ship Power, Offshore.
Six Wärtsilä FS3500 main steerable thrusters
GVA 4000 NCS cat D semi-submersible rig
Length overall: 116 m
Breadth overall: 97 m
Water depth: 100-500 m
Drilling depth: 8,500 m
Power generation 6×5.6MW = 33.6MW
Thrusters: 6x4MW = 24MW
Mooring system: 8/(12) Lines
Accommodation (single cabins): 130