Maintenance method of counter weight of anchor chain of single point mooring system

Abstract

The invention discloses a maintenance method of a counter weight of an anchor chain of a single point mooring system. The maintenance method is characterized in that a counter weight chain is arranged at a position of a fallen counter weight block of the anchor chain; connection points of the counter weight chain and the anchor chain are uniformly distributed on the anchor chain of a falling section of the counter weight block; the connection points are divided into end connection points and middle connection points according to different connection manners; the counter weight chain at each end connection joint is connected with the anchor chain through a transition ring and a connection shackle; the counter weight chain at each middle connection joint is connected with an ordinary chain ring through the transition chain ring, and then is connected with the anchor chain through the connection shackle; and with the adoption of the connection, the connection points are tightly connected with the anchor chain to form a whole body. With the adoption of the maintenance method provided by the invention, the problem that the counter weight block of the anchor chain is easy to fall can be solved; the possibility of falling the shackle, caused by corrosion at the connection points, can be reduced; and meanwhile, the simple and easy installation is realized; the operation time is reduced; and the construction efficiency is improved.

Description

technical field [0001] The invention relates to a single point mooring system, in particular to a maintenance method for anchor chain counterweights of an internal turret type single point mooring system or a single point mooring system similar to a floating production device, and belongs to the field of offshore oil engineering. Background technique [0002] APL's STP (Submerged Turret Production) internal turret single point mooring system is a single point system widely used in offshore floating production storage and offloading tankers (FPSO). Under the action of wind and waves, its mooring legs will rub against and collide with the seabed with the movement of the single-point buoy of the floating production, storage and offloading tanker. Over time, a large number of counterweights on the anchor chain will fall off, affecting the performance of the single-point system. The operation of floating production storage and offloading tankers at sea brings huge safety risks. ...

AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to overcome the above-mentioned shortcomings existing in the prior art, and provide a maintenance method for the anchor chain counterweight of the single point mooring system, which adopts the method of installing the counterweight chain on the anchor chain, and solves the problem of anchor chain counterweight maintenance. The problem that the weight is easy to fall off; and the weight of the newly installed counterweight chain on a single anchor chain is equal to the total weight of the detached counterweight on the anchor chain. The chain and the anchor chain are tightly connected as a whole, which reduces the possibility of the shackle falling off due to collision at the node; at the same time, it is easy to install, shortens the working time, and improves the construction efficiency

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