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Laser-cladding coating preparation process of corrosion-resistant, sulfur-resistant and wear-resistant tubing coupling

A technology of laser cladding and preparation process, which is applied in the direction of metal material coating process and coating, which can solve the problems of corrosion problems that cannot be solved well, the bonding force of the coating layer is not strong, and the success rate of prevention and treatment is not high, so as to save replacement Debugging time and maintenance time, convenient daily maintenance, and high promotional value

Active Publication Date: 2014-09-10
江苏点金激光科技有限公司
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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 end thread of the pipe can still be in contact with the liquid in the pipe string after being connected, the coating is damaged during the coupling screwing process due to 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 and treatment is not high

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0032] A process for preparing an anti-corrosion, anti-sulfur and wear-resistant oil pipe coupling laser cladding coating, comprising the following process steps:

[0033] (1) Machining the coupling, and processing the tubing coupling according to the thread depth + 0.5mm;

[0034] (2) Use cleaning agent to degrease and derust the oil pipe coupling 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;

[0035] (3) 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;

[0036] (4) Use 5000W cross-flow CO 2 Laser, the working platform is SIMENS CNC laser processing machine; the nickel-based alloy powder...

Embodiment 2

[0045] A process for preparing an anti-corrosion, anti-sulfur and wear-resistant oil pipe coupling laser cladding coating, comprising the following process steps:

[0046] (1) Machining the coupling, and processing the tubing coupling according to the thread depth + 1mm;

[0047] (2) Use cleaning agent to degrease and derust the oil pipe coupling 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;

[0048] (3) 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;

[0049] (4) Use 5000W cross-flow CO 2 Laser, the working platform is SIMENS CNC laser processing machine; the nickel-based alloy powder...

Embodiment 3

[0058] A process for preparing an anti-corrosion, anti-sulfur and wear-resistant oil pipe coupling laser cladding coating, comprising the following process steps:

[0059] (1) Machining the coupling, and processing the tubing coupling according to the thread depth +0.5-1.5mm;

[0060] (2) Use cleaning agent to degrease and derust the oil pipe coupling 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;

[0061] (3) 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;

[0062] (4) Use 5000W cross-flow CO 2 Laser, the working platform is SIMENS CNC laser processing machine; the nickel-based alloy powd...

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Abstract

The invention discloses a laser-cladding coating preparation process of a corrosion-resistant, sulfur-resistant and wear-resistant tubing coupling. A 5000 W cross-flow CO2 laser is used; a working platform is a numerical control laser machine; a coaxial or paraxial powder feeding device is used for automatically feeding nickel-based alloy powder into a laser molten pool; and a corrosion-resistant, sulfur-resistant and wear-resistant laser-cladding coating with uniformity and compactness is formed on a processing surface, and is 3-6 mm thick. A laser surface cladding process is adopted; in the cladding process, a heat-affected zone is small, and no influence is generated on the strength of the coupling; and nickel-based alloy with good corrosion resistance and high strength is adopted, so that the coupling obtains excellent corrosion resistance and wear resistance while the strength of the coupling is guaranteed. The preparation process intensifies the corrosion resistance, sulfur resistance and wear resistance of the tubing coupling, prolongs the service life of the tubing coupling, and solves a difficulty unsolved for a long time in the corrosion-resistant application field of an oil tube and the tubing coupling in the oil exploitation and the production operation and maintenance of oil, gas and water wells in our country.

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 coupling. 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 tubing couplings is particularly serious, especially in the middle and later stages of crude oil production in most domestic oil fields, oil wells, oil-gas mixing wells, and water injection wells 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
Inventor 陶兴启黄旭东廖运生
Owner 江苏点金激光科技有限公司
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