The construction process of the protective pipe of the fpso seawater lift pump

Abstract

The invention discloses a building process of a protection tube of a FPSO (floating product storage and offloading) seawater lift pump. The building process includes: S1, respectively building an upper structure and a lower structure of the protection tube of the seawater lift pump; S2, locating the lower structure of the protection tube of the seawater lift pump at a reserved position of a hull, and hoisting the upper structure to be docked with the lower structure; S3, docking a platform on the upper structure with a hull platform. In addition, the invention further discloses a hoisting process of the protection tube of the FPSO seawater lift pump. The hoisting process includes: T1, hoisting the hull on an eleventh foundation section, mounting and positioning; T2, manufacturing a locating adjustment device; T3, manufacturing a guide plate; T4, docking the upper structure of the protection tube with the eleventh foundation section, welding and fixing. The protection tube of the seawater lift pump is divided into the long upper structure and the short lower structure which are built separately, so that paint wear during hoisting after the structures of the protection tube are integrally coated is avoided, repeated coating period is shortened, hoisting accuracy is easy to control, and difficulty in local paint make-up after the structures of the protection tube are mounted is lowered.

Description

technical field [0001] The invention relates to a construction process of a pipe segment, in particular to a construction process for designing a protective pipe of an FPSO seawater lift pump. 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 lift pipe, and 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 the stability of its working performance, it is usually necessary to build a section of protective pipe and let the seawater lift pump work at the bottom of the lumen of the protective pipe, which can effectively slow d...

AI Technical Summary

Problems solved by technology

The conventional construction and hoisting process of the pipe section is built and hoisted in one piece, which inevitably collides and damages the external coating of the protection pipe of the seawater lift pump during the construction process, and even affects the roundness and straightness of the protection pipe. Remedial treatment will be done after the damage, the overall quality of the protection pipe of the seawater lift pump will be greatly reduced

After the protective pipe is damaged and deformed, the construction efficiency and anti-corrosion effect of the secondary coating will be seriously affected in the later secondary construction on the hull, which will increase the construction cost and the subsequent maintenance cost virtually.

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