Method for enhanced redeployability of hyjack platforms
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United States of America Patent
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Apr 21, 1998
Grant Date -
N/A
app pub date -
Dec 23, 1994
filing date -
Dec 23, 1994
priority date (Note) -
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Abstract
A method is disclosed for redeploying an offshore platform structure from a first site to a second sight of different water depth in which the connection is released between a subsea jacket base and a plurality of piles which are anchored in the ocean floor at the first site. The offshore platform structure is vertically raised by pumping air into a tank member at the top of the subsea jacket base and the surface tower which is supported upon subsea jacket base is reworked while the jacket base is vertically raised. This operation is less difficult than attempting operations offshore on a horizontally disposed surface tower. The offshore platform structure is transported to the second site and the tank member is ballasted to vertically lower the offshore platform to the second site where it is installed.
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