Laser-cladded oil well pipe subjected to multicomponent cementation compound treatment and production process and device

Abstract

The invention discloses a laser-cladded oil well pipe subjected to multicomponent cementation compound treatment and a production process and device. A laser cladded heat treatment layer is arranged on a surface multicomponent cementation compound layer of the oil well pipe. The production process comprises the following steps of: step 1. machining a thread structure; step 2. carrying out quenching and tempering treatment; step 3. carrying out polishing treatment; step 4. pre-heating; step 5. carrying out salt bath nitriding treatment; step 6. carrying out salt bath oxidization treatment; step 7. removing salt and washing; step 8. carrying out polishing treatment; step 9. carrying out the salt bath oxidization treatment for the second time; step 10, removing the salt and washing for the second time; step 11. carrying out laser quenching treatment; and step 12. carrying out oil immersing treatment. A device for laser quenching heat treatment is formed by a CO2 laser device, a power meter, an optical shutter, a light guide system, a focusing lens, a reflection lens and a worktable; and the device has the beneficial effects that the service life of the oil well pipe is greatly improved, the cost is low and the benefits are obvious.

Description

technical field [0001] The invention relates to an oil well pipe, a production process and a device for multi-component co-infiltration composite treatment, in particular to an oil well tube, a production process and a device for laser cladding multi-component co-infiltration composite treatment. Background technique [0002] At present, in my country's oil and gas resources, most oil and gas wells contain a large amount of Co 2 、H 2 S and Cl - Ions, these corrosive media are the main cause of oil well pipe corrosion, combined with the combined effect of oil well pipe wear and corrosion, the service life of ordinary oil well pipe is reduced, which greatly increases production costs and reduces production efficiency. During the lifting and lowering operations of the pipe, the sticking phenomenon of the oil well pipe thread is also one of the important reasons that affect the service life of the oil well pipe. As the average well depth of oil and natural gas increases, the ...

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Problems solved by technology

[0003] The main purpose of the present invention is to solve the problems of poor wear resistance and poor corrosion resistance of oil well pipes used in the existing petroleum industry, resulting in increased production costs and reduced production efficiency;

[0004] Another object of the present invention is to solve the problem that the process and structure are complex and easily cause environmental pollution in the existing surface treatment oil well pipe process and device

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