Anticorrosion anti-sulfur wear-resistant oil pipe laser cladding coating preparation process

A technology of laser cladding and preparation process, applied in metal material coating process, coating and other directions, can solve the problems of corrosion problems, weak coating adhesion, low prevention and control success rate, etc., to save replacement The effect of debugging time and maintenance time, convenient daily maintenance, and high promotion value

Inactive Publication Date: 2016-05-18
HUBEI XINCHEN AUTOMATION EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] my country's oil pipelines used American technology in the past, and the corrosion problem has not been solved well
Because the thread at the end of the pipe can still be in contact with the liquid in the pipe string after connection, the coating is damaged during the screwing process of the oil pipe due to its weak bonding force, and long-term production will inevitably cause thread corrosion failure, so the prevention effect is not good. The success rate of prevention is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A process for preparing an anti-corrosion, anti-sulfur and wear-resistant oil pipe laser cladding coating, comprising the following process steps:

[0032] (1) Use cleaning agent to degrease and derust the oil pipe at room temperature, and clean it with alcohol; use coloring flaw detection method to inspect the processed parts, and require the processed parts to be free of cracks, pores and inclusion defects;

[0033] (2) Use nickel-based alloy powders with high strength, corrosion resistance and good metallurgical compatibility with the matrix. The components of the nickel-based alloy powders in terms of weight percentage are: C: 0.02%, Cr: 20%, Fe: 1.2 %, Mo: 8%, Si: 0.2%, Nb: 3.6%, and the balance is Ni;

[0034] (3) Use 5000W cross-flow CO 2 Laser, the working platform is SIMENS CNC laser processing machine; the nickel-based alloy powder in step (2) is automatically fed into the laser molten pool by coaxial or side-axis powder feeding device, forming uniform and de...

Embodiment 2

[0044] A process for preparing an anti-corrosion, anti-sulfur and wear-resistant oil pipe laser cladding coating, comprising the following process steps:

[0045] (1) Use cleaning agent to degrease and derust the oil pipe at room temperature, and clean it with alcohol; use coloring flaw detection method to inspect the processed parts, and require the processed parts to be free of cracks, pores and inclusion defects;

[0046] (2) Use nickel-based alloy powders with high strength, corrosion resistance and good metallurgical compatibility with the matrix. The components of the nickel-based alloy powders in terms of weight percentage are: C: 0.03%, Cr: 21.5%, Fe: 1.4 %, Mo: 9%, Si: 0.4%, Nb: 3.8%, and the balance is Ni;

[0047] (3) Use 5000W cross-flow CO 2 Laser, the working platform is SIMENS CNC laser processing machine; the nickel-based alloy powder in step (2) is automatically fed into the laser molten pool by coaxial or side-axis powder feeding device, forming uniform and ...

Embodiment 3

[0057] A process for preparing an anti-corrosion, anti-sulfur and wear-resistant oil pipe laser cladding coating, comprising the following process steps:

[0058] (1) Use cleaning agent to degrease and derust the oil pipe at room temperature, and clean it with alcohol; use coloring flaw detection method to inspect the processed parts, and require the processed parts to be free of cracks, pores and inclusion defects;

[0059](2) Use nickel-based alloy powders with high strength, corrosion resistance and good metallurgical compatibility with the matrix. The components of the nickel-based alloy powders in terms of weight percentage are: C: 0.04%, Cr: 23%, Fe: 1.6 %, Mo: 10%, Si: 0.4%, Nb: 4.0%, and the balance is Ni;

[0060] (3) Use 5000W cross-flow CO 2 Laser, the working platform is SIMENS CNC laser processing machine; the nickel-based alloy powder in step (2) is automatically fed into the laser molten pool by coaxial or side-axis powder feeding device, forming uniform and de...

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Abstract

The present invention discloses an anticorrosion anti-sulfur wear-resistant oil pipe laser cladding coating preparation process. According to the preparation process, a 5000 W cross-flow CO2 laser is used, and the work platform is a digital control laser processing machine; nickel-based alloy powder is automatically conveyed into a laser cladding pool by using a coaxial or paraxial powder conveying device, and a uniform and compact anticorrosion anti-sulfur wear-resistant laser cladding coating with a thickness of 3-6 mm is formed on the processed surface; and a laser surface cladding process is used, the heat-affected zone is small and the strength of the oil pipe is not affected during the cladding process, and the nickel-based alloy with characteristics of good corrosion resistance and high strength is used, such that the oil pipe achieves excellent corrosion resistance and excellent wear resistance while the strength of the oil pipe is ensured. According to the present invention, corrosion resistance, sulfur resistance and wear resistance of the oil pipe are reinforced, the service life of the oil pipe is prolonged, and the long-term problem in the application fields of the oil pipes and the oil pipe corrosion in the petroleum exploration, the oil, gas and water well production operation and construction, and maintenance is solved.

Description

technical field [0001] The invention relates to the field of laser cladding, in particular to a preparation process for a laser cladding coating of an anti-corrosion, anti-sulfur and wear-resistant oil pipe. Background technique [0002] In the process of oil and gas field development, various oil pipes used are in oxygen, hydrogen sulfide and carbon dioxide. In a dynamic environment, metal pipes are prone to electrochemical corrosion or various types of corrosion due to the interaction of mechanical force and hydraulic force. In the corrosion of oil wells, the internal corrosion of oil pipes is particularly serious, especially when most domestic oil fields enter the middle and late stages of crude oil exploitation, oil wells, oil-gas mixing wells, and water injection wells all contain CO 2 、H 2 Various components such as S corrode the medium, gas, high temperature, high salinity, and the well environment is relatively harsh, and the degree of corrosion continues to intens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C19/05
Inventor 谢爱孙
Owner HUBEI XINCHEN AUTOMATION EQUIP
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