A kind of installation method of fpso ship seawater riser assembly stage

Abstract

The invention discloses an installation method for the assembly stage of seawater risers of FPSO ships, including 67-section large assembly, 63-section large assembly, 27-section large assembly, general assembly and loading; performing 63-section large-scale assembly The assembly includes: installing the main pipe section on the 63-section group stand; installing a temporary support plate for the upper opening and a set of upper opening reinforcements between the upper and lower mouth edges of the main pipe section and the inner side plates of the 63 section in one-to-one correspondence Channel steel, lower temporary supporting plate and a set of lower reinforced channel steel; firstly buckle the 63 subsection group vertically and reversely on the 63 subside outer plate, and then connect the upper and lower temporary supporting plates to the 63 subsection respectively The side shell plate is welded and fixed; the transverse bulkhead on the No. 60 rib position is installed; when the general assembly is carried out, the upper temporary support plate and a set of upper reinforced channel steel are removed; The lower part of the group is reinforced with channel steel. The invention realizes that the seawater riser can be installed in the assembly section, and avoids high-altitude welding and painting in the dock stage.

Description

technical field [0001] The invention relates to a method for installing a seawater riser of an FPSO ship at the stage of assembly. Background technique [0002] With the development of the world's industrial economy, deep-sea oil fields are gradually being developed, and the number of deep-sea drilling and oil production platforms continues to increase. Demand is also increasing. The seawater lift pump is a necessary component on the FPSO. It works under the sea level and lifts the seawater to the FPSO platform through the seawater riser. It provides cooling water and production water for other equipment on the FPSO. Since the seawater lift pump works in seawater all the year round, in order to ensure its stable working performance, it is usually necessary to build a section of seawater lift pipe and fix the seawater lift pump to work at the bottom of the lumen of the seawater lift pipe, which can effectively slow down the operation of the seawater lift pump. The vibration...

AI Technical Summary

Problems solved by technology

Due to the long length of the main pipe section and the thin structure of the installation position on the 63rd section, there is a lack of sufficient corresponding structural support, both the positioning and installation of the main pipe section and the turning over process will affect its accuracy. It is difficult to install the segment group immediately

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