Power and positioning system for drilling rigs from Wärtsilä

23 Jan 2012

The power and positioning system for two new drilling rigs ordered by the Norwegian arm of the Cyprus-based offshore drilling company Songa Offshore are to be supplied by Wärtsilä.

The two cat D semi-submersible rigs are designed for use by Statoil in mid-water segments, and are being built at the Daewoo Shipbuilding and Marine Engineering (DSME) shipyard in South Korea.

The contract for the power and positioning system calls for each rig to be supplied with a total of six V-12-cylinder Wärtsilä 32 engines with ancillaries, and six Wärtsilä FS3500 main steerable thrusters, as well as the integration of the entire system. Additionally, the engines and thrusters will be equipped with Wärtsilä's condition monitoring system. Delivery will begin in 2012 and the first rig is scheduled to be operational during 2014. Wärtsilä has an option for two further rigs.

"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 CO2 emissions. 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.

The semi-submersible rigs are designed for efficient year-round drilling, completion, testing and intervention operations in harsh environments and arctic conditions. They will be operated on the Norwegian Continental Shelf by Statoil. The rigs meet DNV Clean-Design criteria, meaning that the Wärtsilä engines need to be IMO Tier II compliant.

Songa Offshore took delivery in 2011 of eight thrusters for the Songa Eclipse semi-submersible rig.

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