Bearing for oil and gas development drilling

A bearing and screw drill technology, used in bearings, bearing components, shafts and bearings, etc., can solve the problems of low hardness, high processing difficulty and high wear rate of cemented carbide, achieve high toughness and wear resistance, and optimize sintering temperature. , the effect of superior alloy performance

Inactive Publication Date: 2014-10-15
江苏长城石油装备制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The radial bearings in the prior art generally have the disadvantages of low hardness of the cemented carbide module, easy falling off of the hard module and poor wear resistance.
[0004] Chinese patent CN201443561U relates to a bearing for screw drilling tools, which uses a coating to replace the cemented carbide module in the prior art. The coating is a supersonic thermal spray coating, but the coating is difficult to process and high in cost. low rate
[0005] Chinese patent CN203532514U relates to a bearing

Method used

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  • Bearing for oil and gas development drilling
  • Bearing for oil and gas development drilling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: 2% Ti (C, N), 5.5% Co, 0.2% VC, 0.3% Cr 3 C 2 And 0.1% carbon black, the balance is WC, carry out compounding, the average particle size of wherein added WC powder is 0.35 μ m, the average particle size of Ti (C, N) powder is 1.8 μ m, the average particle size of Co powder is 1.2 μ m, VC and Cr 3 C 2 The average particle size of the mixture is less than 1 μm. Polyethylene glycol and an appropriate amount of alcohol are added to the mixture. After wet grinding, drying, and granulation, it is molded into a suitable sample, and then the sample is calcined in a furnace. Two-stage calcination is used for calcination. , the calcination temperature of the first stage is 630°C, and the calcination time is 3 hours. During the calcination, hydrogen gas is introduced to perform dewaxing and deoxidation treatment. After the hydrogen is evacuated, the second end is calcined. 2h, filled with inert gas during calcination, and cooled with the furnace to obtain a cobalt-ri...

Embodiment 2

[0035] Example 2: 3% Ti (C, N), 5% Co, 0.4% VC, 0.5% Cr 3 C 2 And 0.3% carbon black, the balance is WC, carry out compounding, the average particle size of wherein added WC powder is 0.35 μ m, the average particle size of Ti (C, N) powder is 1.9 μ m, the average particle size of Co powder is 1.1 μ m, VC and Cr 3 C 2 The average particle size of the mixture is less than 1 μm. Polyethylene glycol and an appropriate amount of alcohol are added to the mixture. After wet grinding, drying, and granulation, it is molded into a suitable sample, and then the sample is calcined in a furnace. Two-stage calcination is used for calcination. , the calcination temperature of the first stage is 650°C, and the calcination time is 2 hours. During the calcination, hydrogen gas is introduced to perform dewaxing and deoxidation treatment. After the hydrogen is evacuated, the second end is calcined. 1h, filling inert gas during calcination, and cooling with the furnace to obtain a cobalt-rich su...

Embodiment 3

[0038] 2.5%Ti(C,N), 5.4%Co, 0.3%VC, 0.4%Cr 3 C 2 And 0.2% carbon black, the balance is WC, carry out mixing, wherein the average particle size of the added WC powder is 0.38 μ m, the average particle size of Ti (C, N) powder is 1.9 μ m, the average particle size of Co powder is 1 μ m, VC and Cr 3 C 2 The average particle size of the mixture is less than 1 μm. Polyethylene glycol and an appropriate amount of alcohol are added to the mixture. After wet grinding, drying, and granulation, it is molded into a suitable sample, and then the sample is calcined in a furnace. Two-stage calcination is used for calcination. , the calcination temperature of the first stage is 640°C, and the calcination time is 2.5h. During the calcination, hydrogen gas is introduced for dewaxing and deoxidation treatment. After the hydrogen is evacuated, the second end is calcined. 1.5h, filled with inert gas during calcination, and cooled with the furnace to obtain a cobalt-rich superfine-grained gradi...

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Abstract

The invention discloses a bearing for a screw rod drill. The bearing comprises an inner sleeve and an outer sleeve, wherein wear resistant layers are respectively bonded on the outer surface of the inner sleeve and the inner surface of the outer sleeve, and are prepared by arranging hard alloy blocks on a steel main body by certain rules; gaps among the hard alloy blocks are formed by brazing tungsten carbide powder and bonding alloy in a high-temperature furnace; the hard alloy blocks are ultra-fine grain gradient hard alloy blocks rich in cobalt on the surfaces, and comprise the following raw materials: 2-3% of Ti (C, N), 5-5.5% of Co, 0.2-0.4% of VC, 0.3-0.5% of Cr3C2, 0.1-0.3% of carbon black, and the balance of WC; the bonding alloy comprises the following components in percentage by weight: 11-12% of Ni, 12-14% of Zn, 23-24% of Mn, and the balance of copper; and the total amount of impurities is not greater than 0.45%. The wear resistant layers of the bearing have such characteristics as high hardness, good roughness, long wear resistant time and firm combination with a steel matrix.

Description

technical field [0001] The invention relates to a radial bearing, in particular to a radial bearing of a screw drilling tool used in oil and gas development drilling. Background technique [0002] The performance of the radial bearing in the screw drilling tool directly affects the service life of the screw drill. Its working environment is harsh, and it is surrounded by high-temperature mud when working. Therefore, the bearing is required to have good stability, wear resistance and impact resistance. [0003] Radial bearings in the prior art generally have disadvantages such as low hardness of the cemented carbide module, easy falling off of the hard module and poor wear resistance. [0004] Chinese patent CN201443561U relates to a bearing for screw drilling tools, which uses a coating to replace the cemented carbide module in the prior art. The coating is a supersonic thermal spray coating, but the coating is difficult to process and high in cost. low rate. [0005] Chin...

Claims

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Application Information

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IPC IPC(8): F16C33/12C22C9/04C22C9/06C22C29/08C22C1/05B22F5/00
CPCF16C2204/10
Inventor 郭健郭小芳郭乃林
Owner 江苏长城石油装备制造有限公司
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