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| LUN-A Platform |
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| Sakhalin Concave and Slider
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| Sakhalin Offshore Platforms, Russia |
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| Two massive offshore platforms located in a severe seismic and arctic environment are protected from earthquake damage by Friction PendulumTM bearings. In each platform, four large bearings sit atop a four-legged concrete gravity structure and support an integrated topside steel deck. The offshore platforms are the centerpiece of a $US 20 billion investment by Sakhalin Energy Investment Company (SEIC), led by Shell, in the development of the Lunskoye gas field and the Piltun- Astokhskoye oil field in the Sea of Okhotsk, Russia. |
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| Use of Friction PendulumTM bearings saved an estimated $US 300 million in construction costs for the two platforms. During a 200-year return period seismic event, the platforms are expected to remain elastic, and during a 3000-year return period event, only limited structural damage is expected. |
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| The Friction PendulumTM bearings used for the Sakhalin II Platforms are the largest load carrying seismic isolation bearings ever manufactured. The testing program developed by SEIC includes both high-load and highspeed testing and is the most rigorous and demanding test program ever developed for a seismic isolation application. |
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