Dry-tree semi-submersible production and drilling unit
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United States of America Patent
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Aug 19, 2014
Grant Date -
Feb 7, 2013
app pub date -
Apr 25, 2011
filing date -
Apr 26, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A deep draft semi-submersible production and drilling platform unit with dry trees is described. The platform unit preferably comprises four columns, a ring pontoon, a two-axis symmetrical hull with draft in the range of 100 to 155 feet, top-tensioned risers with push or pull tensioners of preferred combined vertical stiffness of 10% to 30% of the platform water plane stiffness, a wellbay with a well spacing in the range of 12 to 18 feet, a riser guiding system supported by the pontoons or at an elevated level, topside facilities supported by a box type of deck structure, mooring lines, and catenary risers.
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Cited Art Landscape
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