Tension type mooring system and mounting method thereof

Abstract

The invention provides a tension type mooring system and a mounting method thereof. The tension type mooring system comprises a floating production storage and off-loading device provided with at least one composite mooring rope; a suction anchor used as a mooring foundation is arranged at the bottom of the composite mooring rope; the composite mooring rope refers to a three-section composite mooring rope in a tension state and comprises an upper anchor chain, a middle polyester rope and a bottom anchor chain, the upper anchor chain, the middle polyester rope and the bottom chain are connectedfrom top to bottom sequentially, and a first float ball is arranged at the joint between the middle polyester rope and the bottom anchor chain. According to the tension type mooring system and the mounting method thereof, tension type multi-point mooring of the polyester ropes is utilized, the polyester rope resilience stiffness is high, high resilience force is provided for the floating production storage and off-loading device, and horizontal offset is reduced effectively; besides, as shorter mooring ropes are needed, price of the polyester ropes of the same break strength is lower, cost issaved, and economical efficiency is higher.

Description

technical field [0001] The present invention relates to an FPSO mooring system, in particular to a novel FPSO tensioned mooring system and an installation method thereof. Background technique [0002] With the increasing human demand for energy, offshore oil resources will become the main battlefield for the development of oil and gas resources. At present, the exploitation of offshore oil and gas resources has developed into the deep sea, and the working water depth of many offshore floating structures reaches 3000m. With the increase of mining depth, marine floating structures such as FPSO have higher and higher requirements on the rigidity and performance of their mooring systems. [0003] The function of the mooring system is to effectively limit the motion response of the floating platform, so that the platform can meet the engineering requirements in a suitable water area, such as the design requirements of the riser and the guarantee of working conditions. [0004] ...

AI Technical Summary

Problems solved by technology

At the same time, the horizontal angle between the catenary line and the hull increases, and the tension in the horizontal direction decreases, which cannot meet the requirements of the platform's restoring force, and many new problems will arise in design and construction.

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