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Anticorrosion pipe provided with alloy layers

A technology of alloy layer and anti-corrosion pipe, which is applied in pipeline anti-corrosion/rust protection, drill pipe, casing, etc. It can solve the problems of poor anti-scaling effect and short service life, and achieve strong adhesion, high mechanical strength and durability erosive effect

Inactive Publication Date: 2012-01-11
蔡桂华
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of existing oil pipes or casing pipes, such as poor anti-corrosion, anti-wax, anti-scaling effects and short service life, the present invention provides an anti-corrosion pipe provided with an alloy layer, which not only has good corrosion resistance, and combines Strong force, good mechanical properties, anti-aging, and also has the advantages of strong anti-wax and anti-scaling

Method used

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  • Anticorrosion pipe provided with alloy layers

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Embodiment Construction

[0009] The present invention will be further explained below in conjunction with the drawings:

[0010] by figure 1 As shown, an anticorrosive pipe provided with an alloy layer includes a pipe body 1, the inner and outer walls of the pipe body 1 are plated with an iron-aluminum multi-element alloy layer 2, and the iron-aluminum multi-element alloy layer 2 is away from the circle of the pipe body 1. The arc surface is provided with a pure alloy layer 3, and the thickness of the iron-aluminum multi-element alloy layer 2 is 80-120 μm.

[0011] The tubing or casing has good corrosion resistance and can ensure that the outer surface will not be layered or fall off during construction and transportation; it is mainly used in polymer flooding oil wells, ternary oil flooding wells, gas flooding oil and gas wells, and strong Corrosion, strong fouling water wells, heavy waxing oil wells, natural gas wells and CO2 injection and production wells, etc.

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Abstract

The invention discloses an anticorrosion pipe provided with alloy layers. The anticorrosion pipe comprises a pipe body, wherein a Fe-Al multielement alloy layer is respectively coated on the inner wall and the outer wall of the pipe body, and a circular-arc surface of the Fe-Al multielement alloy layer, which is away from the pipe body, is provided with a pure alloy layer. The anticorrosion pipe not only has favorable anticorrosion performance, large bonding force, good mechanical property and ageing resistance, but also has the advantages of strongly preventing wax and scale.

Description

Technical field: [0001] The invention relates to an oil pipe or casing used in the field of oil extraction, in particular to an anticorrosive pipe provided with an alloy layer. Background technique: [0002] Oil pipes or casing pipes are used to transport liquids during oil production. If the oil pipes are used for a long time, corrosion and perforation will occur, causing the oil pipes or casing pipes to be unusable before their service life. The anti-corrosion methods of tubing or casing used in the prior art are all surface isolation layer methods, which can only temporarily isolate the corrosive medium in the environment. With the extension of use time, the anti-corrosion layer begins to fall off the gas layer, causing the tubing Or casing corrosion is intensified, and the surface isolation layer is mainly epoxy resin coating. These epoxy resin coatings have the problems of high water absorption, poor mechanical shock resistance and mechanical scratch resistance, and they are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/00F16L58/08
Inventor 蔡桂华
Owner 蔡桂华
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