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Semi-submersible drilling platform

A drilling platform and semi-submersible technology, applied in the direction of floating buildings, etc., can solve the problems of endangering the safety of the platform, limited strength of tubular cross braces, high deck strength requirements, etc., to improve motion performance, increase payload capacity, increase The effect of the ability to resist strong winds and waves

Inactive Publication Date: 2008-07-16
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the strength of these tubular cross braces is limited, and once damaged, the safety of the entire platform will be endangered, so the requirements for deck strength are relatively high

Method used

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Embodiment Construction

[0016] As shown in Figures 2 and 8, the semi-submersible drilling platform 10 of the present invention consists of 2 buoyant tanks 12,14, 4 columns 20,22,24,26, two wide airfoil horizontal braces 38,40 and box Type deck 30 constitutes. Columns 20, 22, 24, 26 are used to support and place equipment box decks 30 such as drilling facilities, and columns 20, 22, 24, 26 stand on two buoyancy tanks 12, 14 respectively. Between the pontoons 12 and 14, a wide airfoil horizontal strut 38 is arranged directly below the columns 20 and 24, and between the pontoon tanks 12 and 14, another wide airfoil horizontal brace 40 is configured directly below the columns 22 and 26 . The pontoons 12 and 14 are placed horizontally and parallel to each other, and each pontoon supports two uprights; , 14 joints are positioned at the buoyancy box inboard directly below the column. The box deck 30 is supported by four columns 20, 22, 24, 26. Various equipment can be placed on the box deck as required, ...

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Abstract

The invention discloses a semi-submersible drilling platform. The semi-submersible drilling platform provided by the invention comprises two floating boxes; at least two upright rods are supported on each floating box; a deck is supported on the upright rods; wherein, at least two wide-wing horizontal braces are connected with the floating boxes; the connection part of the horizontal braces and the floating boxes is positioned right under the upright rods on the floating boxes. The invention is provided with two wide-wing horizontal braces between the floating boxes of the semi-submersible drilling platform and right under the upright rod to connect with the floating boxes; the connection part of the horizontal braces and the floating boxes is positioned right under the upright rod on the floating boxes, which can increase displacement of the platform, enhance strength and capacity of anti stormy wave of the platform, and allows the platform to work under a medium and even wicked sea state; secondly, internal part of the wide-wing brace is divided into at least two watertight compartments; even when the outside compartment is damaged, the undamaged structure can still retain enough loading capacity.

Description

technical field [0001] The invention relates to an offshore semi-submersible drilling platform. Background technique [0002] As offshore oil development continues to enter the deep water area, the traditional fixed platform is no longer able to meet the operational needs, and the floating platform will become the main tool for the exploration and development of deep water oil and gas fields in the future. The semi-submersible drilling platform is an important member of a class of floating platforms, such as the semi-submersible drilling platform disclosed in WO9957011A1, as shown in Figure 1A, two buoyancy tanks 12, 14 provide buoyancy for it, each Two vertical columns 20, 22, 24, 26 are supported, and the upper structure is supported at the tops of the four columns. The two columns are connected with a tubular cross brace 38, 40 to improve the strength of the platform. However, the strength of these tubular cross braces is limited, and once damaged, the safety of the enti...

Claims

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Application Information

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IPC IPC(8): B63B35/44
Inventor 曾恒一谢彬林瑶生粟京李小平沈志平冯玮张海彬
Owner CHINA NAT OFFSHORE OIL CORP
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