Drill rod joint wearproof belt and preparation method thereof

A technology for drill pipe joints and wear-resistant bands, which is applied to drill pipes, drilling equipment, drill pipes, etc., can solve the problems of poor wear resistance of the joint surface and short service life, and achieve extended service life, high controllability, and avoid Shedding effect

Active Publication Date: 2019-10-11
CHINA UNIV OF GEOSCIENCES (BEIJING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a drill pipe joint wear-resistant band and a preparation method thereof, through the spraying process of the cold-sprayed FeCrMoBYC-HBN gradient composite coating wear-resistant band that improves the drill-pipe joint surface wear resistance to solve the problem of At present, the commonly used joints in drilling engineering have poor surface wear resistance and short service life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Carry out derusting, degreasing and deoxidizing treatment on the base body of 35CrMo drill pipe joints, use corundum with a particle size of 250-800 μm for sandblasting and roughening treatment, and then use acetone with a purity of 99.5% to ultrasonically clean and dry; sandblasting and roughening process The process parameters in are: pressure 0.1MPa, time 25s, distance 40mm;

[0051] Melt and mix Cr powder, Mo powder, B powder, Y powder, C powder and Fe powder at 1400°C to obtain a fluid; the fluid is gas atomized and crushed under the conditions of a pressure of 4MPa and a vacuum of 0.133Pa Condensation to obtain Fe-based amorphous alloy powder raw materials with a particle size of 2 to 30 μm; the Fe-based amorphous alloy (FeCrMoBYC) powder with a particle size of 2 to 30 μm is used as the first powder, and the composition of the FeCrMoBYC powder is:

[0052] Cr: 13.0 wt%; Mo: 25.0 wt%; B: 1.0 wt%; Y: 3.0 wt%; C: 3.0 wt%;

[0053] Mix 95wt% of the above-mentioned F...

Embodiment 2

[0057] Carry out derusting, degreasing and deoxidizing treatment on the base body of 35CrMo drill pipe joints, use corundum with a particle size of 250-800 μm for sandblasting and roughening treatment, and then use acetone with a purity of 99.5% to ultrasonically clean and dry; sandblasting and roughening process The process parameters in are: pressure 0.1MPa, time 50s, distance 40mm;

[0058] Melt and mix Cr powder, Mo powder, B powder, Y powder, C powder and Fe powder at 1400°C to obtain a fluid; the fluid is gas atomized and crushed under the conditions of a pressure of 4MPa and a vacuum of 0.133Pa Condensation to obtain Fe-based amorphous alloy powder raw materials with a particle size of 2 to 30 μm; the Fe-based amorphous alloy (FeCrMoBYC) powder with a particle size of 2 to 30 μm is used as the first powder, and the composition of the FeCrMoBYC powder is:

[0059] Cr: 14.0 wt%; Mo: 26.0 wt%; B: 1.5 wt%; Y: 3.5 wt%; C: 3.5 wt%;

[0060] Mix 95wt% of the above-mentioned F...

Embodiment 3

[0064] Carry out derusting, degreasing and deoxidizing treatment on the base body of 35CrMo drill pipe joints, use corundum with a particle size of 250-800 μm for sandblasting and roughening treatment, and then use acetone with a purity of 99.5% to ultrasonically clean and dry; sandblasting and roughening process The process parameters in are: pressure 0.1MPa, time 50s, distance 50mm;

[0065] Melt and mix Cr powder, Mo powder, B powder, Y powder, C powder and Fe powder at 1400°C to obtain a fluid; the fluid is gas atomized and crushed under the conditions of a pressure of 4MPa and a vacuum of 0.133Pa Condensation to obtain Fe-based amorphous alloy powder raw materials with a particle size of 2 to 30 μm; the Fe-based amorphous alloy (FeCrMoBYC) powder with a particle size of 2 to 30 μm is used as the first powder, and the composition of the FeCrMoBYC powder is:

[0066] Cr: 15.0wt%; Mo: 27.0wt%; B: 2wt%; Y: 5wt%; C: 5wt%;

[0067]Mix 95wt% of the above-mentioned FeCrMoBYC pow...

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Abstract

The invention provides a drill rod joint wearproof belt. The drill rod joint wearproof belt comprises a drill rod joint substrate and a coating. The coating is arranged on the surface of the drill rodjoint substrate and is of a multi-layer structure, and the mass contents of hexagonal boron nitride of the coating are different. The coating with the different mass contents of the hexagonal boron nitride is prepared from components including Fe-based amorphous alloy and the hexagonal boron nitride. The mass contents of the hexagonal boron nitride in the multi-layer-structure coating with the different mass contents of the hexagonal boron nitride are gradually increased from the interior to the surface. Compared with the prior art, cold spraying is adopted, and high-temperature phase changeand heat stress generated by a drill rod joint can be avoided; the FeCrMoBYc amorphous alloy has high hardness and has a wearproof effect; and an HBN stratified structure has an antifriction effect, the FeCrMoBYc amorphous alloy and the hexagonal boron nitride are combined to be prepared into the gradient coating, and the comprehensive wearproof performance of the wearproof belt can be greatly enhanced. The invention further provides a preparation method of the drill rod joint wearproof belt.

Description

technical field [0001] The invention relates to the field of drill pipe technology, in particular to a drill pipe joint wear-resistant belt and its preparation Background technique [0002] With the continuous exploration of seabed energy by deep-sea drilling, the demand for drill pipe joints in drilling tools is increasing. However, due to the poor quality of the joints, the annual economic loss caused by the wear and tear failure of the joints is large. In actual work, through force analysis, it can be known that the joint is subjected to axial movement from the impact of the drill bit on the bottom of the well, and long-term operation will cause the outer surface of the joint to be worn and scrapped. According to the service requirements, the joints are required to have high friction resistance and strength. In order to reduce the wear of the lower head drill and the casing, a method of welding a layer of hard wear-resistant material on the outer surface of the drill pi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/10C22C45/02C23C24/04
CPCC22C45/02C23C24/04E21B17/1085
Inventor 康嘉杰岳文苏娟付志强朱丽娜佘丁顺王成彪梁健翁炜田斌黄飞
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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