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Rolls-Royce will supply thrusters and deck machinery for two semi-submersible drilling rigs, to be built by Samsung Heavy Industries in Korea for Stena Drilling as part of a contract.

According to Rolls-Royce the contract, valued at around £22m, includes options for deliveries to three additional rigs.

To be built for worldwide operations, including in the rough North Sea, the two Moss CS60 harsh-environment semi-submersible drilling rigs are set to be delivered in 2016.

Rolls-Royce offshore president Anders Almestad said Samsung is the company’s largest yard customer when it comes to propulsion.

"This contract confirms our solid foot print in the exploration and production market, and we are very pleased that Samsung and Stena Drilling chose to place another order with us," Almestad added.

Each of the drilling rigs will be equipped with six underwater mountable UUC 455 FP thrusters, eight point-mooring systems and control systems provided by Rolls-Royce.

Said to be part of the rigs’ propulsion systems, the thrusters are used to propel the rigs to and from drill sites and maintain their positioning properly during drilling operations.

Underwater mountable thrusters are easily mounted and dismantled without drydocking the rig and enable a reduction in downtime.

Rolls-Royce, which supplies thrusters and deck machinery to the offshore drilling market, has so far delivered 1,200 thrusters to close to 200 rigs and drillships and mooring systems for 25 rigs.

The UK-based company reported annual underlying revenue of £12.2bn in 2012, of which more than half came from the provision of services.

Image: Semi-submersible drilling rigs are built for global operations. Photo courtesy of Rolls-Royce plc.