Composite coating for wear-proof casing of petroleum drilling tool and preparation method of composite coating

A composite coating and wear-resistant sleeve technology, applied in the direction of coating, metal material coating process, etc., to achieve the effect of low dilution rate, high impact toughness, and excellent wear resistance

Pending Publication Date: 2021-08-03
天津市汇利通金属表面技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is still very little research on laser cladding technology on the surface of oil drilling tools, and t

Method used

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  • Composite coating for wear-proof casing of petroleum drilling tool and preparation method of composite coating
  • Composite coating for wear-proof casing of petroleum drilling tool and preparation method of composite coating
  • Composite coating for wear-proof casing of petroleum drilling tool and preparation method of composite coating

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Experimental program
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Effect test

preparation example Construction

[0050] The preparation method of the above-mentioned composite coating for the oil drilling tool wear-resistant sleeve comprises the following steps:

[0051] (1) Grind the base material with sandpaper, wash off the surface oil with acetone, preheat the base material after drying, and the preheating temperature is 230-280°C;

[0052] (2) Use an analytical balance to weigh a certain amount of graphene according to the mass percentage, add absolute ethanol, and disperse it in a CF-600Y ultrasonic processor for 3 hours, with a power of 2 kilowatts, and add nickel-based alloy powder in proportion to the graphene dispersion and tungsten carbide powder, and finally put the mixed powder into a ball mill for 10 hours to make the powder mix evenly; then place it in a vacuum drying oven for drying at 150°C for 3-5 hours before use;

[0053] According to the process of step (2), the raw materials for the cladding bottom layer and the raw materials for the cladding surface layer are respe...

Embodiment 1

[0060] (1) Coating formula composition and ratio

[0061] a. Cladding bottom layer: in terms of mass percentage, nickel-based alloy powder 66%, tungsten carbide powder 31%, graphene powder 3%;

[0062] b. Cladding surface layer: in terms of mass percentage, 46% of nickel-based alloy powder, 51% of tungsten carbide powder, and 3% of graphene powder. After mixing evenly, place in a vacuum drying oven, dry at 150°C for 3 hours, and set aside.

[0063] (2) Base material pretreatment

[0064] Grind the surface of the base material of the wear-resistant sleeve with sandpaper, remove the surface oil with acetone, preheat the base material after drying, and the preheating temperature is 250°C.

[0065] (3) Preparation of coating by laser cladding

[0066] Put the uniformly mixed and dry compound powder of a formula into the automatic powder feeding device, and under the protection of high-purity argon, use the coaxial powder feeding process to send the powder to the surface of the ...

Embodiment 2

[0073] (1) Coating formula composition and ratio

[0074] a. Cladding bottom layer: according to mass percentage, nickel-based alloy powder 66%, tungsten carbide powder 32%, graphene powder 2%;

[0075] b. Cladding surface layer: in terms of mass percentage, 46% of nickel-based alloy powder, 52% of tungsten carbide powder, and 2% of graphene powder. After mixing evenly, place in a vacuum drying oven, dry at 150°C for 3 hours, and set aside.

[0076] (2) Base material pretreatment

[0077] Grind the surface of the base material of the wear-resistant sleeve with sandpaper, remove the surface oil with acetone, preheat the base material after drying, and the preheating temperature is 240°C.

[0078] (3) Preparation of coating by laser cladding

[0079] Put the uniformly mixed and dry compound powder of a formula into the automatic powder feeding device, and under the protection of high-purity argon, use the coaxial powder feeding process to send the powder to the surface of the...

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Abstract

The invention relates to a composite coating for a wear-proof casing of a petroleum drilling tool. The composite coating comprises a cladding bottom layer and a cladding surface layer, and the cladding surface layer is clad on the surface of the cladding bottom layer. Raw materials of the cladding bottom layer and the cladding surface layer comprise nickel-based alloy powder, tungsten carbide powder and graphene powder, and the mass of the graphene powder accounts for 1%-4% of the total mass of the mixture. A double-formula cladding material is adopted, so that the content of the nickel-based alloy on the inner layer of the cladding coating is high, it is guaranteed that the cladding layers have enough toughness, the impact resistance of the coating is improved, the content of tungsten carbide on the surface layer of the cladding coating is high, it is guaranteed that the cladding layer has enough hardness, the wear resistance of the coating is improved, and the nickel-based alloy, the tungsten carbide, and the graphene are mixed for use in the composite coating. The microstructure can be improved, the strengthening phase distribution is more uniform, and the self-lubricating effect also can be achieved.

Description

technical field [0001] The invention belongs to oil drilling tool repair technology field The invention relates to technical improvements related to wear resistance and wear remanufacturing of oil drilling tools, especially a composite coating for oil drilling tool wear-resistant sleeves and a preparation method thereof. Background technique [0002] In oil drilling engineering, the working environment of oil drilling tools is very harsh. After long-term use, the wear resistance of wear-resistant sleeves will cause wear and failure of drill pipes and joints, which will cause great economic losses in severe cases. The wear-resistant sleeves of oil drilling tools will be replaced by new wear-resistant sleeves when they wear out, and these old wear-resistant sleeves will be returned to the furnace for remanufacturing, resulting in waste of resources and increased remanufacturing costs. Therefore, the research on the wear resistance of the wear sleeve and the remanufacturing of...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C19/05C22C30/00C22C29/08
CPCC22C19/055C22C29/067C22C29/08C22C30/00C23C24/103
Inventor 郎娟王乃亮
Owner 天津市汇利通金属表面技术有限公司
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