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Surface treatment method for sucker rod coupling

A sucker rod coupling and surface treatment technology, used in heat treatment furnaces, heat treatment equipment, coatings, etc., can solve the problem of weak anti-eccentric wear and corrosion effect, achieve good bidirectional protection, prolong oil pipe life, reduce The effect of poor hardness

Active Publication Date: 2013-03-27
丰县卓越机电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Various oilfields have adopted many anti-eccentric wear and corrosion measures, such as the use of sucker rods and collar centralizers, oil pipes and sucker rod rotators, and injection of corrosion inhibitors. These conventional anti-eccentric wear measures have their advantages, but with As the downhole mining conditions are getting worse, its shortcomings are becoming more and more obvious, and the effect of anti-eccentric wear and corrosion is getting weaker and weaker.

Method used

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  • Surface treatment method for sucker rod coupling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1. Place the sucker rod coupling made of 40Cr steel after machining in a heat treatment furnace at 870°C for 1 hour, then quench it into water to cool to room temperature, and then keep it in the heat treatment furnace at 550°C for 2 hours After air cooling, the hardness is guaranteed to be HRC30;

[0015] 2. Sand blast the surface of the heat-treated sucker rod coupling in a solid sandblasting machine to remove the scale and rust on the surface;

[0016] 3. Spray the surface of the sucker rod coupling by supersonic flame spraying, and use NiCrBSiMo powder particles with an equal proportion and a particle size of 200 mesh to 10×10 6 Joule's impact energy is sprayed on the heat-treated sucker rod coupling surface, and the coating thickness is 0.45mm;

[0017] 4. Fix the sprayed sucker rod coupling on a common lathe and rotate it at a speed of 600 rpm. At the same time, use an acetylene welding torch at an instantaneous temperature of 2500-2800°C to partially remelt the ...

Embodiment 2

[0021] 1. Place the 45-steel sucker rod coupling that has been machined in a heat treatment furnace at 920°C for 2 hours, then quickly quench it into water to cool to room temperature, and then keep it in the heat treatment furnace at 650°C for 3 Air cooling after 1 hour to ensure hardness at HRC35;

[0022] 2. Sand blast the surface of the heat-treated sucker rod coupling in a solid sandblasting machine to remove the scale and rust on the surface;

[0023] 3. Spray the surface of the sucker rod coupling by supersonic flame spraying, and use NiCrBSiMo powder particles with an equal proportion and a particle size of 250 mesh to 15×10 6 Joule’s impact energy is sprayed on the surface of the heat-treated sucker rod coupling, and the coating thickness is 0.4mm;

[0024] 4. Fix the sprayed sucker rod coupling on the ordinary lathe and rotate it at a speed of 800 rpm, and at the same time, use an acetylene welding torch to partially remelt the sprayed NiCrBSiMo at an instantaneous ...

Embodiment 3

[0028] 1. Place the 35CrNiMo steel sucker rod coupling in a heat treatment furnace at 880°C for 1 hour after machining, then quench it into water to cool to room temperature, and then hold it at 600°C for 2 hours in the heat treatment furnace Air cooling, ensure hardness at HRC40;

[0029] 2. Sand blast the surface of the heat-treated sucker rod coupling in a solid sandblasting machine to remove the scale and rust on the surface;

[0030] 3. Spray the surface of the sucker rod coupling by supersonic flame spraying, and use 15×10 6 Joule’s impact energy is sprayed on the heat-treated sucker rod coupling surface, and the coating thickness is 0.39mm;

[0031] 4. Fix the sprayed sucker rod coupling on a common lathe and rotate it at a speed of 700 rpm, and at the same time, use an acetylene torch to partially remelt the sprayed coating NiCrBSiMo at an instantaneous temperature of 2800-3200 °C for 1.5 seconds to improve the spraying effect. The density of the layer and the bondin...

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Abstract

The invention relates to a surface treatment method for a sucker rod coupling, which comprises: firstly, performing heat insulation and surface sand blasting on the surface of the sucker rod coupling; secondly, adopting ultrasonic flame spraying, increasing a remelting procedure, increasing the tightness of a coating, and controlling the hardness of the coating to be in low level; and thirdly, performing sand blasting and anti-oxidation treatment. The obtained sucker rod coupling has high abrasion resistance, and simultaneously the hardness difference between the sucker rod coupling and an oil pipe is reduced, the abrasion state is converted into low from high, and the abrasion rate can be obviously reduced. Under the same operating conditions, the service life of the coupling prepared by the method is more than 10 times of that of a common coupling, and simultaneously the coupling can effectively protect the oil pipe and prolong the service life of the oil pipe by more than 5 times compared with the common coupling, and has good bilateral protection function.

Description

technical field [0001] The invention belongs to the technical field of material surface treatment, in particular to a surface treatment method for sucker rod couplings. Background technique [0002] As an important resource for the sustainable development of the world today, energy is not only looking for new energy, but also vigorously tapping the potential of the original energy, especially the deep mining of the original oil field has a prominent position and significance. When crude oil mining enters the middle or late stage, on the one hand, the water content, salinity and sand content of the produced fluid are getting higher and higher, and at the same time, the degree of corrosion is becoming more and more serious; The phenomenon of eccentric wear and corrosion is becoming more and more serious, and the cost of controlling eccentric wear and corrosion in various oil fields has also increased significantly. According to statistics, in the pump inspection operations ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F17/00C21D9/00C21D1/18C21D1/82C23C4/12C23C4/06C23C24/10C23C4/129
Inventor 陈文革陈友杰陈琰
Owner 丰县卓越机电有限公司