RS oversees repairs to Sakhalin offshore rigs

Offshore staff

YANTAI, China – Repairs have been completed to the sixth-generation semisubmersible mobile offshore drilling units Polyarnaya Zvezda and Severnoye Siyaniye at the Yantai CIMC Raffles Offshore Shipyard.

The Russian Maritime Register of Shipping (RS) was responsible for the survey of the repair and equipment replacement campaign.

RS specialists inspected the hull structures, ship machinery, and disassembled devices. Tests and operation checks of the machinery, equipment and ship systems, as well as platform sea trials, were all successful, and the MODUs are ready to continue offshore operations – previously they were stationed offshore Sakhalin Island.

Polyarnaya Zvezda and Severnoye Siyaniye are self-propelled floating catamaran structures with two pontoons and six stabilizing columns, supporting the top hull and topsides.

They are suited to exploration and production drilling of gas and oil-and-gas wells up to 7,500 m (24,606 ft) deep in water depths ranging from 70-500 m (229-1,640 ft) in broken ice up to 70-cm (27-in.) thick.

They area also equipped to operate in ambient temperatures up to -30°C (-22°F). Both rigs were built under RS survey at Russia’s Vyborgskiy shipyard for operation in Arctic conditions.


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Polyarnaya Zvezda and Severnoye Siyaniye
Polyarnaya Zvezda and Severnoye Siyaniye semisubmersible drilling rigs offshore Sakhalin Island. (Photo courtesy Gazprom)

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