Stress limiting device for offshore oil reservoir production pipe
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United States of America Patent
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Jul 18, 2006
Grant Date -
Aug 11, 2005
app pub date -
Dec 10, 2004
filing date -
Dec 10, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to a device for improving the fatigue strength of a metal pipe a portion of which lies on the sea bottom and one end of which is suspended from a floating support subjected to the dynamic motions of the sea which move the touchdown point (TDP) of the pipe. The device comprises stress limiting means comprising a material (13) inserted between the pipe and the ground, in the vicinity of the touchdown point, the system thus created having a lineic stiffness below 200 kN/m/m and a thickness determined in such a way that the static and cyclic deformations remain allowable.
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