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RS Class: repair of two semi-submersible mobile offshore drilling units completed
18 April 2016

RS Class: repair of two semi-submersible mobile offshore drilling units completed
Repair of Polyarnaya Zvezda and Severnoye Siyaniye, semi-submersible mobile offshore drilling units (MODU) of the sixth generation, has been completed under survey of Russian Maritime Register of Shipping (RS) at Yantai CIMC Raffles Offshore Shipyard Ltd. in Yantai, China. Mr. Konstantin Palnikov, RS Director General, attended the ceremony of MODUs delivery to customer, which was held on 15 April 2016. 

During survey of the MODU repair and equipment replacement RS specialists performed docking survey, inspection of hull structures, ship machinery and disassembled devices. The tests and operation checks of the machinery, equipment and ship systems, as well as platform sea trials, were successful. Currently their presentation to the next survey has been completed, and the MODUs are ready to continue their work. 

Structurally, Polyarnaya Zvezda and Severnoye Siyaniye are self-propelled floating catamaran structures with two pontoons and six stabilizing columns, supporting the top hull and topside. The platforms are suitable for exploration and production drilling of gas and oil-and-gas wells of up to 7500 m in depth at sea depths from 70 to 500 m in broken ice up to 70 cm thick. Their equipment is designed to efficiently and safely operate at ambient temperatures up to - 30 ° C. 

Polyarnaya Zvezda and Severnoye Siyaniye platforms were built under RS survey at Vyborgskiy shipyard for operation in Arctic conditions. RS class notation: KM✪ [1] AUT1-ICS EPP semi-submersible ice-resistant MODU. Before the repair they were operating at the offshore area of Sakhalin. 



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Russian Maritime Register of Shipping (RS) has accumulated considerable experience in survey of offshore infrastructure facilities. Now the competence of RS allow technical support of projects for the construction, operation and maintenance of offshore oil and gas structures of any complexity, including those intended for the production of hydrocarbons in the harsh climate of the Arctic. A wide network of offices in Russia and abroad allows RS to provide services in any region quickly and efficiently.


Established in 1913, Russian Maritime Register of Shipping (RS) is one of the leading classification societies. Recognised by the European Union. Member of IACS. The RS activity is aimed at enhancing high standards of maritime safety and minimising the negative impact of human activities on the environment through scientifically based risk assessment and risk management procedures.

RS HEAD OFFICE: 8, Dvortsovaya Nab., 191186, St.Petersburg, RUSSIA. Tel: +7 (812) 3128878, Fax: +7 (812) 3141087, E-mail: pobox@rs-class.org