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Method for mounting submerged buoy in ultra-deep water

An installation method and ultra-deep water technology, applied in anchoring arrangement, transportation and packaging, ship parts, etc., can solve the problems of consuming a lot of man-hours and increasing the installation cost of buoys, and achieve the effect of easy operation, reduction of operation difficulty and cost avoidance

Active Publication Date: 2013-11-20
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. It is necessary to use the auxiliary anchor chain to control the movement of the buoy in the water. The installation of the auxiliary anchor chain, the connection between the auxiliary anchor chain and the buoy, and the recovery of the auxiliary anchor chain in ultra-deep water require a lot of man-hours, which greatly increases the buoy. installation cost

Method used

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  • Method for mounting submerged buoy in ultra-deep water
  • Method for mounting submerged buoy in ultra-deep water
  • Method for mounting submerged buoy in ultra-deep water

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Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings. The invention is illustrated by way of example of the installation of a buoy with three anchor leg connection points.

[0047] Such as figure 1 As shown, the synchronous installation of the deepwater anchor 2 and the anchor leg 3 is completed through the cooperation of the workboat A1 and the workboat B28. The anchor leg 3 (including the bottom anchor chain section 5, the anchor cable 6, and part of the top anchor chain section A7) is kept tensioned in the water under the action of the auxiliary buoy 4 and the chain section A11, and is inclined at a certain angle so that the buckle 10 is in the water. A certain position is maintained in the water to facilitate connection with the hook 13 and to prevent interference between different anchor legs.

[0048] Such as figure 2As shown, with the assistance of another workboat C29, three groups of ballast systems are connec...

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Abstract

The invention discloses a method for mounting a submerged buoy in ultra-deep water. The method comprises the steps of preparation work, mooring system mounting, location and sinking of the buoy, connection between the mooring system and the buoy, and regulation of length of an anchor leg. The invention discloses the feasible scheme for mounting the submerged buoy in the ultra-deep water, an auxiliary anchor chain is not used for controlling the movement of the buoy, but a ballast system is used for controlling the buoy to stably sink, as a result, that the cost and man-hour are increased due to the use of the auxiliary anchor chain, is avoided. According to the method disclosed by the invention, the mooring system is connected with the buoy by matching lifting hooks and ring-shaped buckles, operation difficulty is lowered, the lifting hooks and the ring-shaped buckles are operated in a water depth approaching the submergence depth of the buoy, and the method is easier to operate compared with technology realizing connection on seabed. During the whole mounting process, the working area of remote operated vehicles is not deeper than the submergence depth of the buoy, so that the problems in the prior art of the pressure resistance and safety of the remote operated vehicles working under the sea level are avoided.

Description

technical field [0001] The invention relates to an installation technology of ultra-deep water oil exploitation equipment, in particular to an installation method of a submerged buoy in ultra-deep water. Background technique [0002] Buoys are widely used in the field of ships and ocean engineering. For buoys moored by detachable inner turrets (mooring devices with buoyancy and installed inside the hull), the buoys need to be in place on the FPSO (floating surface production unit) It is installed at a certain depth underwater, and the installation effect directly affects the safety of FPSO mooring. The deepwater riser installation of FPSO utilizes buoys as the support foundation in the water for the riser, which reduces the oscillation response of the connection point. The buoy needs to be installed at a certain depth underwater, and the stability of the buoy underwater will directly affect the stability of the riser. [0003] At present, the development waters of China's ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B21/50
Inventor 黄一甄兴伟张崎李晓阳王文华
Owner DALIAN UNIV OF TECH
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