A manufacturing method for a new type of pipe section used for seawater lifting of offshore oil platforms

Abstract

The invention discloses a novel pipe section for seawater lifting of an offshore oil platform. The novel pipe section comprises a pipe body and flanges arranged at the two ends of the pipe body, wherein the pipe body and the flanges are molded integrally. The invention further discloses a manufacturing method of the novel pipe section. The manufacturing method comprises the following steps that a mandrel is manufactured; the outer surface of the mandrel is wound with a polyester film and sprayed with resin; after the resin is solidified, the outer surface of a resin layer is wound with carbon fiber sprayed with resin, and the carbon fiber is stacked at the two ends of a pipe to form flange blanks; then, the mandrel is taken out, the flange blanks are extruded with dies to increase the density of the flange blanks, and integral molding of the pipe body and the flanges is completed; the surfaces of the pipe body and the flanges are wound with a polyester film layer; and the formed pipe section is inspected finally. According to the novel pipe section and the manufacturing method, the requirements of seawater conveying and the work of a seawater lifting pump are met; the reliability of a seawater pipeline is improved; the novel pipe section has higher tensile strength and bending strength, is resistant to seawater corrosion; and marine organisms can not attach to the pipeline easily.

Description

technical field [0001] The invention relates to a seawater pipeline, in particular to a manufacturing method for a new pipe section used for lifting seawater on an offshore oil platform. Background technique [0002] With the rapid development of offshore oil, the number of drilling and oil production platforms continues to increase. The platforms use seawater cooling equipment, so the platforms are equipped with seawater pumps. The seawater pumps work below sea level, and the seawater is raised above the deck through seawater pipelines. The seawater pipeline consists of several pipe sections, which can not only transport seawater, but also withstand the weight of the lower seawater pump and the vibration of the seawater pump during operation. Seawater pipelines are made of metal materials, and they work in seawater environment for a long time, causing serious corrosion, and there are marine organisms attached, so they have to be replaced regularly. In recent years, the pla...

AI Technical Summary

Problems solved by technology

Seawater pipelines are made of metal materials. They work in seawater environment for a long time, causing serious corrosion, and there are marine organisms attached, so they have to be replaced regularly

In recent years, the platform has tried to use alloy pipelines, but there are still corrosion problems. The cost of using high-nickel alloy pipelines is high, which is unbearable for the platform; it has also tried to use carbon fiber or glass steel pipes, but the existing carbon fiber and glass steel pipes are connected with flanges. The bonding form cannot meet the working requirements of the seawater lift pump

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