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Bidirectional protecting oil pump plunger and hot spray processing technique for surface of same

A processing technology and surface spraying technology, applied in metal material coating technology, coating, pump components, etc., can solve the problems of reducing the normal service life of the pump barrel, achieve saving alloy powder, high spraying efficiency, and reasonable control of the process flow Effect

Inactive Publication Date: 2009-11-25
ANTON OILFIELD SERVICES (GRP) LTD
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  • Summary
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AI Technical Summary

Problems solved by technology

[0005] Although the chemical plating and other coatings on the surface of the plunger of the oil well pump in the past slow down the wear of the plunger to a certain extent and improve the corrosion resistance of the plunger, due to the increase of its own surface hardness, it will inevitably cause damage to the inside of the pump barrel. Increased surface wear reduces the normal service life of the pump barrel

Method used

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  • Bidirectional protecting oil pump plunger and hot spray processing technique for surface of same
  • Bidirectional protecting oil pump plunger and hot spray processing technique for surface of same

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Embodiment Construction

[0016] A thermal spraying process for bidirectionally protecting the plunger surface of an oil well pump is carried out according to the following procedure:

[0017] 1. Surface pretreatment. The surface of the plunger is roughened with a 100# abrasive belt, and the surface is activated to ensure that the surface is clean and free of oil.

[0018] 2. Preheat. Remove the moisture on the surface of the plunger and increase the temperature of the surface of the plunger, increase the bonding rate of the powder, and avoid the rebound loss caused by excessive powder hitting the cold workpiece. The preheating temperature is generally around 300°C, that is, the color of the plunger surface is almost blue or just blue.

[0019] 3. Pre-spray powder. The plunger surface temperature will eventually rise to 1000°C during the spraying process. When the surface temperature gradually rises above 400°C, the surface metal will be oxidized at a high temperature. In order to prevent this phe...

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Abstract

The invention relates to a directional protecting oil pump plunger and a hot spray processing technique for the surface of the same. The protecting oil pump plunger comprises a long cylinder; two ends of the cylinder are provided with external threads and are connected with a valve cover; the surface of the plunger is sprayed with a layer of corrosion-resistant and wear-resistant AOC alloy coating; the thickness of the alloy coating is more than 0.25 mm; and after the working procedures of surface roughening activating treatment, spraying, remelting and polishing, a wear-resistant and corrosion-resistant coating is formed on the surface of the plunger. The processing technique has simple and convenient operation; the coating is combined closely after spraying; the performance of a basal body of the plunger is not influenced during spraying; and the thickness of the coating is more than 0.25 mm, and the coating can resist outside wearing and corrosion and reduce the wearing to the inner surface of a pump cylinder of an oil well pump.

Description

technical field [0001] The invention relates to a two-way protection oil well pump plunger and a thermal spraying process on the surface of the plunger, which belongs to the field of petroleum equipment processing. Background technique [0002] Rod pump oil production of pumping unit is an artificial lifting oil production method, which is widely used in major oil fields at home and abroad for its advantages of simple equipment, low investment, convenient management and strong adaptability. The performance of rod pump oil extraction equipment plays a decisive role in the field of oil extraction. The oil well pump is an important part of it. It is lowered into the well through the oil pipe and the sucker rod and submerged at a certain depth below the liquid surface, and the oil is discharged from the ground by pumping. The oil pump is mainly composed of pump barrel, plunger, oil inlet valve and oil outlet valve. During the upstroke, the volume of the lower pump chamber belo...

Claims

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Application Information

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IPC IPC(8): F04B53/14C23C4/06C23C4/02C23C4/12C23C4/129
Inventor 李耀辉
Owner ANTON OILFIELD SERVICES (GRP) LTD
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