Method for installing large fair-lead structure on water

Abstract

The invention discloses a method for installing a large fair-lead structure on water, which comprises the steps of: A, carrying out a hole opening design on the original barge outer board and the original barge reinforced frame; B, designing a steel slide, welding the steel slide on an appointed position on a barge; C, marking a sign on a selected placing position according to the original barge installing position and the barge load-regulating capacity of the fair-lead structure; D, dragging and moving the barge loaded with the fair-lead structure to an open hole of the ship outer board of a floating type production and storage discharging device by using a tug and inserting the steel slide into a barge body; E, connecting a dragging chain block with a fair-lead structure dragging lifting lug, dragging and moving to the installing position in a cabin of the floating type production and storage discharging device by using the dragging chain block; and F, after the barge is ballasted for 50mm, withdrawing the steel slide. According to the method for installing the large fair-lead structure on water, the fair-lead structure is installed on water, the traditional installing technology is broken through, and the docking period cost is saved. The method has the advantages of simpleness, simplified process, lower cost, wide application range and strong maneuverability and repeatability.

Description

technical field [0001] The invention relates to the field of water installation engineering of a large-scale fairlead structure of a floating production storage and offloading ship (FPSO) and other marine engineering products, and in particular relates to a method for overwater installation of a large-scale fairlead structure. Background technique [0002] As the world's deep-sea oilfields are gradually developed, the demand for floating production, storage and offloading (FPSO) and other offshore products in the international market continues to increase, and their dimensions are also increasing. Most of the FPSO ships are VLCC-type The oil tanker is refitted, and now the widest refit reaches 60 meters; FPSO ships generally do not have a power system, and have served in fixed sea areas for 30 years, so they need the support of a strong mooring system to resist complex sea conditions, according to the environment of the service waters Most FPSOs use multi-point mooring. The ...

AI Technical Summary

Problems solved by technology

[0002] As the world's deep-sea oilfields are gradually developed, the demand for floating production, storage and offloading (FPSO) and other offshore products in the international market continues to increase, and their dimensions are also increasing. Most of the FPSO ships are VLCC-type The oil tanker is refitted, and now the widest refit reaches 60 meters; FPSO ships generally do not have a power system, and have served in fixed sea areas for 30 years, so they need the support of a strong mooring system to resist complex sea conditions, according to the environment of the service waters Most FPSOs use multi-point mooring. The fairlead structure is a very important part of it. The general weight is about 150-300 tons. The installation of the cable structure is mainly carried out in the dock and on the berth. Generally, the crane cannot be used for direct installation, and only hydraulic trolleys or other methods can be used. The requirements for the width of the dock are relatively strict, and a large amount of tooling equipment is required for installation. Poor adaptability, Large investment and long docking period for concurrent production reduce the utilization rate of dock or slipway, so a scientific, reasonable and safe water installation method is essential for design