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Hard alloy coating layer capable of being totally dissolved in water medium and preparation method and application thereof

A technology of complete dissolution of cemented carbide, applied in metal material coating process, coating, earthwork drilling and mining, etc., can solve the problems of affecting the use effect of tools, not easy to flow back, insoluble, etc., so as to save the grinding and milling process , Facilitate flowback and improve construction efficiency

Active Publication Date: 2019-12-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the slips partially dissolve in the well, the inlaid ceramic and hard alloy block will loosen, which will affect the use effect of the tool; while the ceramic and hard alloy block are insoluble and not easy to flow back, which also affects the actual demand

Method used

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  • Hard alloy coating layer capable of being totally dissolved in water medium and preparation method and application thereof
  • Hard alloy coating layer capable of being totally dissolved in water medium and preparation method and application thereof
  • Hard alloy coating layer capable of being totally dissolved in water medium and preparation method and application thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment provides a cemented carbide coating that is completely soluble in an aqueous medium and is composed of a soluble aluminum alloy and a nickel-based alloy, wherein the volume ratio of the soluble aluminum alloy and the nickel-based alloy is 1:9. The soluble aluminum alloy components and the mass percentage of each component are: 3% Mg, 1% Cu, 1.3% Ga, 0.2% In, and the balance is Al. The soluble aluminum alloy is at 95°C and the concentration is 3wt.%. The dissolution rate in KCl solution is 15mg / cm 2 hr; the nickel-based alloy is Ni60, and the particle size is 250 mesh.

[0038] Concrete preparation steps are as follows:

[0039] (1) Process the above-mentioned soluble aluminum alloy block into small chips, and use a ball mill (the volume ratio of balls and soluble aluminum alloy chips is 1:1) to grind the chips into small chips at 300 rpm / min for 6 hours. Powder, the size of which is screened out is 200 mesh powder to obtain soluble aluminum alloy powde...

Embodiment 2

[0047] This embodiment provides a cemented carbide coating that is completely soluble in an aqueous medium and is composed of a soluble magnesium alloy and an iron-based alloy, wherein the volume ratio of the soluble magnesium alloy and the iron-based alloy is 1:11.5. The soluble magnesium alloy components and the mass percentage content of each component are: 8% Al, 1.5% Zn, 0.5% Ni, and the balance is Mg. The soluble magnesium alloy is dissolved in a 3wt.% KCl solution at 95°C The rate is 25mg / cm 2 hr; iron-based alloy is Fe60, particle size 200 mesh.

[0048] Concrete preparation steps are as follows:

[0049] (1) Process the above-mentioned soluble magnesium alloy block into small chips, and use a ball mill (the volume ratio of balls and soluble magnesium alloy chips to be 1:2) to grind the chips into small chips at a speed of 300 rpm for 6 hours. Powder, the size of which is screened out is 200 mesh powder to obtain soluble magnesium alloy powder;

[0050] (2) Mix the ...

Embodiment 3

[0054] This embodiment provides a cemented carbide coating that is completely soluble in an aqueous medium and is composed of a soluble aluminum alloy and a nickel-based alloy, wherein the volume ratio of the soluble aluminum alloy and the nickel-based alloy is 1:6. The soluble aluminum alloy components and the mass percentage of each component are: 3% Mg, 1% Cu, 1.3% Ga, 0.2% In, and the balance is Al. The soluble aluminum alloy is at 95°C and the concentration is 3wt.%. The dissolution rate in KCl solution is 25mg / cm 2 hr; nickel-based alloy is Ni60, particle size 300 mesh.

[0055] Concrete preparation steps are as follows:

[0056] (1) Process the above-mentioned soluble aluminum alloy block into small chips, and use a ball mill (the volume ratio of balls and soluble aluminum alloy chips is 1:1.5) to grind the chips into small chips at 300 rpm / min for 6 hours. Powder, the size of which is screened out is 200 mesh powder to obtain soluble aluminum alloy powder;

[0057] ...

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Abstract

The invention discloses a hard alloy coating layer capable of being totally dissolved in a water medium and a preparation method and application thereof. The hard alloy coating layer consists of dissoluble alloy powder and hard alloy powder; the dissolving speed is proper; and the hardness is high. The preparation method comprises the following steps: the hard alloy powder and the dissoluble alloypowder are uniformly mixed for spraying to workpieces through a plasma spraying, flame spraying or supersonic spraying process to obtain the hard alloy coating layer; and the combination with basal bodies is excellent. The hard alloy coating layer can be applied to the surface protection of tools or parts used in the oil and gas field fracturing modification construction, can be totally dissolvedafter construction to save subsequent grinding and milling procedures, facilitates flowback, and improves the construction efficiency.

Description

technical field [0001] The invention belongs to the field of hard alloy coating preparation and oil and gas field development, and in particular relates to a hard alloy coating which can be completely dissolved in water medium and its preparation method and application. Background technique [0002] A large number of oil and gas resources are distributed in shale, and these resources are distributed in formations of different depths. Due to the characteristics of low permeability, it is difficult to exploit them. For low-permeability oil and gas resources, oil companies often use horizontal well multi-stage hydraulic fracturing technology to increase single well productivity. In fracturing construction, it is necessary to use isolation tools (bridge plugs and fracturing balls) to seal off the construction string, and then use high-pressure fracturing fluid to fracture the shale formation to facilitate oil and gas transportation. [0003] Currently, most commonly used isolat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/06C23C4/134C23C4/129C22C21/06C22C23/02E21B43/26
CPCC23C4/06C23C4/134C23C4/129C22C21/06C22C23/02E21B43/26
Inventor 刘军汪伟李文戈赵胜兰王大江方梦莉王晓婉陈德敏
Owner CHINA PETROLEUM & CHEM CORP
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