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The new chocking technology has been installed in a major subsea-installation project on StatoilHydro’s Oseberg Sør platform in the North Sea, to protect against conductor damage as part of an underwater-repair program. It is one of the latest developments in this technology.
Structural integrity issues surrounding aging offshore wells in the North Sea area-including the well conductor system (defined as the main outer structural tubular)-have driven a rising demand for subsea chocking as one method of protection from the fatigue effects of lateral wave movement. Conductor damage, a common problem on offshore platforms, has long been a topic for debate, as different causes are cited and as new solutions are tested. Many of the solutions, such as clamps, address the symptoms rather than the cause. Others, including the new chocking technology, have previously been restricted to topside use, but the latest developments have subsea applications.
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