E - Fixed Constructions – 02 – B
Patent
E - Fixed Constructions
02
B
114/58.2
E02B 17/02 (2006.01) E02B 17/00 (2006.01)
Patent
CA 1255161
COMPLIANT OFFSHORE PLATFORM ABSTRACT OF THE DISCLOSURE A compliant offshore platform in which the primary restoring force to lateral displacement is established by flex piles driven into the seafloor and fixedly secured to the platform legs a preselected distance above the seafloor. The platform includes a substantially rigid space-frame structure extending from the ocean bottom to a position above the ocean surface. A drilling and production deck is secured atop the space-frame structure. Shear piles extend through the base of the space-frame structure to prevent lateral displacement of the base while permitting the space-frame structure to pivot about its base. As the platform sways about its base in response to environmental forces, the flex piles establish a vertical couple at the location at which they are attached to the space frame structure. This couple resists movement of the platform away from a vertical orientation. In the preferred embodiment, the flex piles are secured to the platform at or near one-half the total height of the space-frame structure.
514694
Danaczko Mark A.
Finn Lyle D.
Glasscock Maynard S.
Piazza Michael P.
Steele Kenneth M.
Borden Ladner Gervais Llp
Exxon Production Research Company
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