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Method for preparing wear-resistant coating of resistance-reduction and torsion-reduction tool of large-displacement well through laser

A technology of extended-reach wells and wear-resistant coatings, applied in coatings, metal material coating processes, etc., can solve problems such as drill sticking, low bonding force, and twisting of drilling tools, so as to reduce costs and increase service life , the effect of excellent wear resistance and corrosion resistance

Inactive Publication Date: 2017-03-08
沈阳大陆激光工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the physical combination between the electroplating coating and the base material, the binding force is not high, and the coating often falls off during long-term operation of the drag reduction and torque reduction tools in extended-reach wells, and vicious accidents such as drill sticking and twisting of drilling tools are prone to occur
At the same time, the electroplating process also has the problem of environmental pollution caused by sewage discharge.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] A method and material for laser manufacturing a wear-resistant coating of a drag-reducing and torsion-reducing tool for an extended-reach well, including the following process.

[0032] (1) Wear-resistant coating processing and surface pretreatment of drag and torque reducing tools.

[0033] Use graphite steel or nodular cast iron with good strength and toughness to turn and process the wear-resistant coating surface of the drag-reducing and torque-reducing tool with a certain laser cladding size, degrease and rust the wear-resistant coating surface at room temperature, and clean it with alcohol clean.

[0034] (2) Selection of alloy powder and adjustment of automatic powder feeding device.

[0035] The selected alloy powder of the present invention is a nickel-based alloy powder, and its chemical composition weight percent is: C: 0.14%; Cr: 15.3%; Si: 1.12%; Fe: 1.81%; Mn: 0.34%; Mo: 1.06% ; B: 1.24%; the balance is Ni.

[0036] Preparation method of nickel base all...

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Abstract

The invention discloses a method for preparing a wear-resistant coating of a resistance-reduction and torsion-reduction tool of a large-displacement well through laser. The method comprises the following steps: pretreating the surface of the resistance-reduction and torsion-reduction tool of the large-displacement well by deoiling and derusting the surface of the surface of the resistance-reduction and torsion-reduction tool of the large-displacement well under the room temperature; selecting specially-prepared nickel-based alloy powder, adjusting an automatic powder feeding device, enabling alloy powder out of an automatic powder feeding head to just fall into a laser cladding tank, adjusting powder feeding amount and enabling the thickness of an alloy powder coating to reach 0.8-1.2mm; carrying out laser cladding of a wear-resistant and corrosion-resistant coating by automatically feeding the alloy powder into the laser cladding tank by using a synchronous powder feeding device, feeding high-power focused laser beams and the automatic powder feeding head along an axial direction, rotating the resistance-reduction and torsion-reduction tool of the large-displacement well according to a set rotation rate, and forming a uniform and dense laser cladding layer on the external surface of a horizontal roller; and carrying out subsequent heat treatment by slowly cooling the resistance-reduction and torsion-reduction tool after broadband laser cladding of the nickel-based alloy, fully wrapping the resistance-reduction and torsion-reduction tool by using heat preservation cotton, and distressing and annealing the resistance-reduction and torsion-reduction tool under the room temperature.

Description

technical field [0001] The invention relates to a method for repairing drilling equipment for extended-reach wells, in particular to a method for manufacturing wear-resistant coatings for drag-reducing and torsion-reducing tools for extended-reach wells by laser. Background technique [0002] The drag and torsion reduction tool for extended-reach wells is one of the important equipment in the drilling technology of extended-reach wells, which bears all the lateral forces originally borne by the drill pipe tie. In extended-reach wells, the friction and torque gradually increase with the increase of well depth. Extended reach well drilling tools work under high torque and high friction conditions for a long time, which seriously affects the service life of drill pipes, and at the same time increases the probability of downhole accidents and complex situations. The friction torque of the whole well is relatively large, and vicious accidents such as pipe sticking and drill tool...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C19/05
Inventor 张冬雪陈海涛
Owner 沈阳大陆激光工程技术有限公司
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