Ballast extension-submersion truss stable platform

a stable platform and submerged technology, applied in waterborne vessels, special-purpose vessels, movement controllers, etc., can solve the problems of high cost, challenge, and current deep-water floating platform designs
US20070204785A1Inactive Publication Date: 2007-09-06CHOW ANDREW W
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Patent Information

Authority / Receiving Office
US ยท United States
Current Assignee / Owner
CHOW ANDREW W
Publication Date
2007-09-06
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

To overcome high construction and deployment / installation costs of spar platforms that are typically employed in deep waters for oil and gas production, Ballast Extension-Submersion Truss Stable Platform (BEST Stable Platform) capitalizes on a minimized wave-zone buoyancy design to control platform water-plane area. With a truss connected ballast that could be positioned at different depths, the Best Stable Platform can be constructed in shallow water near a fabrication yard, and the entire assembly could be towed to a drill site where the extended and submerged ballast would provide operational stability. For horizontal stability, mooring lines are floated by water neutral-density means to remove anchor line curvature. Accordingly, mooring lines could be pulled straight under water to provide optimal horizontal resistance, thereby reducing the need for excessive mooring line pretension that increases platform loads. Savings are realized by not having to design floating platforms that must have extra capacity to accommodate added pretension.
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Description

CROSS REFERENCE TO RELATED APPLICATION

[0001] This Application is related to application Ser. No. 11 / 159,089.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

[0002] not applicable INCORPORATED BY REFERENCE OF MATERIAL SUBMITTED ON A COMPACT DISC

[0003] not applicable BACKGROUND OF THE INVENTION

[0004] As oil and gas operations extend farther and farther out into deeper ocean areas, new technology has facilitated the petroleum industry's ability to manage production in more difficult environments. However, there are challenges with current deep-water floating platform designs. Deep-draught platform transportation and deployment in deep waters requires installation of topside superstructure in mid ocean, which is challenging and expensive. At depth of 10,000 ft for example, mooring lines for horizontal stability are affected by catenary curvature flexibility of anchor cables or chains, and large horizontal platform movement results as mooring line curvature changes with...

Claims

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