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Floating Deep Draft Semi-Submersible Offshore Platforms and Methods for Assembling and Deploying Same

Inactive Publication Date: 2016-07-14
BP CORP NORTH AMERICA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a new kind of deep draft semi-submersible offshore platform that can be easily assembled and deployed to deep ocean locations. The platform has a buoyant hull and a moveable deck that can move up and down relative to the hull. It can also be ballasted to increase its draft and raised the deck vertically relative to the hull. This platform has several technical advantages over previous designs and can be used for various offshore operations.

Problems solved by technology

The motions of shallow draft semi-submersible platforms are usually relatively large, and thus, they are generally not suitable for top tensioned risers and dry production trees.
Such smaller motions also reduce the likelihood of inducing damage to risers and mooring systems.

Method used

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  • Floating Deep Draft Semi-Submersible Offshore Platforms and Methods for Assembling and Deploying Same
  • Floating Deep Draft Semi-Submersible Offshore Platforms and Methods for Assembling and Deploying Same
  • Floating Deep Draft Semi-Submersible Offshore Platforms and Methods for Assembling and Deploying Same

Examples

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Embodiment Construction

[0024]The following discussion is directed to various exemplary embodiments. However, one skilled in the art will understand that the examples disclosed herein have broad application, and that the discussion of any embodiment is meant only to be exemplary of that embodiment, and not intended to suggest that the scope of the disclosure, including the claims, is limited to that embodiment.

[0025]Certain terms are used throughout the following description and claims to refer to particular features or components. As one skilled in the art will appreciate, different persons may refer to the same feature or component by different names. This document does not intend to distinguish between components or features that differ in name but not function. The drawing figures are not necessarily to scale. Certain features and components herein may be shown exaggerated in scale or in somewhat schematic form and some details of conventional elements may not be shown in interest of clarity and concis...

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Abstract

A semi-submersible platform for offshore operations includes a buoyant hull including an adjustably buoyant base and a plurality of adjustably buoyant columns extending vertically from the base. In addition, the platform includes a deck moveably coupled to the columns. The deck is configured to move vertically up and down relative to the hull.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims benefit of U.S. provisional patent application Ser. No. 62 / 102,278 filed Jan. 12, 2015, and entitled “Floating Deep Draft Semi-Submersible Offshore Platforms and Methods for Assembling and Deploying Same,” which is hereby incorporated herein by reference in its entirety.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0002]Not applicable.BACKGROUND[0003]This disclosure relates generally to floating offshore structures. More particularly, this disclosure relates to buoyant semi-submersible offshore platforms for offshore drilling and production operations. Still more particular, the disclosure relates to buoyant semi-submersible offshore platforms having increased draft and associated stability, while being able to be constructed dockside.[0004]The draft of a floating offshore structure refers to the vertical distance between the waterline (sea surface) and the bottom of the structure when the structu...

Claims

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Application Information

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IPC IPC(8): E02B17/08B63B21/50E02B17/06B63B21/00B63B35/44E02B17/02
CPCE02B17/08B63B35/44E02B17/021E02B17/06B63B2035/442B63B21/50E02B2017/0047B63B2021/003B63B21/00B63B35/4413B63B75/00B63B77/00
Inventor MURRAY, JOHN JAMES
Owner BP CORP NORTH AMERICA INC
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