Floating installation method for upper assembling block of tension leg platform

A technology of tension leg platform and block, which is applied to ship parts, transportation and packaging, ships, etc., can solve the problems of high capacity requirements of ships, and achieve the effect of saving debugging, reducing impact, and flexible towage form

Active Publication Date: 2015-07-01
CHINA NAT OFFSHORE OIL CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the assembly of the wharf is affected by the weight of the blocks, the water depth of the wharf and the capacity of the crane, the overall dry towing has higher requirements on the capacity of the ship

Method used

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  • Floating installation method for upper assembling block of tension leg platform
  • Floating installation method for upper assembling block of tension leg platform
  • Floating installation method for upper assembling block of tension leg platform

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Embodiment Construction

[0026] Such as figure 1 — Figure 5 As shown, the present invention adopts the following installation steps:

[0027] The first step: After the construction of the lower floating body 1 is completed, the lower floating body 1 is towed to the installation sea area with a tugboat for standby, and then connected to the columns of the lower floating body 1 through the temporary mooring system 4 and fixed; used to restrict the lower floating body 1 movement;

[0028] Step 2: Connect the upper module 2 to the dynamic positioning vessel 3 by the module support unit 6 and dry tow it to the installation sea area for standby; the position of the dynamic positioning vessel 3 from the lower floating body 1 is 300 meters away.

[0029] Step 3: Set up an environmental monitoring system on the work ship near the installation sea area to forecast the environmental conditions of the installation sea area in real time, and monitor the movement of the lower floating body 1 and the dynamic positioning ...

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Abstract

The invention discloses a floating installation method for an upper assembling block of a tension leg platform. The floating installation method includes the following installation steps: 1, pulling a lower floating body to an installation sea area, and fixedly connecting the lower floating body; 2, connecting the upper assembling block with a power positioning ship, and dryly pulling the upper assembling block to the installation sea area; 3, monitoring the movement of the lower floating body and the movement of the power positioning ship; 4, when the installation requirement is met, starting ship entering work; 5, after the lower floating body is submerged to be at the set immersion depth, adjusting the position of the upper assembling block and the position of the lower floating body, and preparing butt joint work; 6, enabling the lower floating body to continuously float till the lower floating body is in contact with the upper assembling block, transferring the weight of the upper assembling block to the lower floating body, and enabling the ship to get out of the lower floating body and be driven out of the installation sea area; 7, fixing the upper assembling block and the lower floating body, and continuously and wetly pulling the upper assembling block and the lower floating body to a final working sea area for other-part installation. According to the floating installation method, after the upper assembling block and the lower floating body are independently built, floating installation is completed on the sea; influences of a building site on assembling block installation are greatly reduced, and the on-sea connecting debugging and installation time is saved.

Description

Technical field [0001] The invention relates to an installation method of an oil platform, in particular to a method for floating support installation of an upper module of a tension leg platform. It belongs to the field of offshore oil engineering. Background technique [0002] As the global offshore oil industry continues to develop into the deep sea, the engineering cost of traditional fixed and self-weight platforms has increased significantly with the increase of water depth. Therefore, as a new platform suitable for deep-sea oil production, the tension leg platform has been widely used in deep-water oil and gas development at home and abroad. [0003] At present, the tension leg platform is usually built as a whole on the land, and then it is installed on the installation site by dry or wet towing. However, as the dock assembly is affected by the weight of the modules, the water depth of the dock and the crane capacity, the overall dry towing requires a higher ship capacity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B9/06
Inventor 尹汉军钟文军蔡元浪毛程亮杨小龙刘波杨辉杨亮杨光董宝辉张广磊
Owner CHINA NAT OFFSHORE OIL CORP
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