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''Kolskaya'' was a jack-up rig operating in the Russian Far East. It was built by Rauma-Repola in Finland in 1985 and was owned by the Russian company ''ArktikmorNeftegazRazvedka'' (AMNGR), a subsidiary of Zarubezhneft.〔 〕 ''Kolskaya'' was an independent leg cantilever type jack-up rig.〔 (【引用サイトリンク】 Rig Data: Kolskaya ) 〕 It was long and wide, and could accommodate up to 102 people.〔 〕 Its rated water depth for operations was . Its drilling depth was .〔 ==Capsize and sinking== On December 18, 2011 the rig, which was under tow during a fierce storm, capsized and sank in the Sea of Okhotsk. It was being towed by the icebreaker ''Magadan'' and the tugboat ''Neftegaz-55'' having just completed an exploration well for Gazprom off the Kamchatka Peninsula. The incident happened some off the coast of Sakhalin island, in waters more than deep.〔 〕 The towing operation was illegal since the platform’s manufacturer explicitly stated that “towing is prohibited in the winter, in winter seasonal zones.” 〔(Limitations for sea towing )〕 A search and rescue effort began as soon as the rig sunk and was halted five days later on December 22. Of the 67 people known to have been aboard ''Kolskaya'', 14 had been rescued and 36 more were listed as missing. Only 17 bodies had been recovered.〔 〕 With 53 declared missing or dead, it was the largest number of casualties in an accident the Russian oil sector has ever experienced.〔 〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Kolskaya (jack-up rig)」の詳細全文を読む スポンサード リンク
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