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Manufacturing method of double-cutting diamond impregnated insert

A manufacturing method and diamond technology, which can be used in earth-moving drilling, drilling equipment, drill bits, etc., can solve the problems of low bonding strength, insufficient matrix strength, poor diamond wettability and bonding ability, etc. The effect of rock breaking efficiency and prolonging service life

Active Publication Date: 2015-03-11
CCDC PETROLEUM CORING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high interface energy between the diamond and the matrix, the wettability and bonding ability between the diamond and the matrix are poor, the bonding strength is low, and the matrix is ​​not strong enough to wear prematurely, making the diamond particles easy to fall off prematurely.
The diamond-impregnated agglomerate with a single cutting structure is used as the cutting element, which makes the life of the diamond-impregnated drill bit short in difficult-to-drill and complex formations, which has an adverse effect on geological exploration

Method used

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  • Manufacturing method of double-cutting diamond impregnated insert
  • Manufacturing method of double-cutting diamond impregnated insert
  • Manufacturing method of double-cutting diamond impregnated insert

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for manufacturing a double-cut diamond-impregnated block. The sintered layer 2 wraps natural diamond particles 1 on the surface of the impregnated block 5 through a hot-pressing impregnation sintering process; wherein the mass percentage of the sintered layer 2 components includes: tungsten carbide 40 %, cemented carbide 15%, nickel 8%, manganese 7%, copper alloy 30%; hot pressing dipping sintering process includes:

[0032] (1). Put the natural diamond particles 1, the sintered layer 2 powder and the impregnated agglomerate 5 into the corresponding positions of the graphite mold.

[0033] (2). Heating and applying pressure, the heating rate during heating is 100°C / min, and the applied pressure is 15Mpa.

[0034] (3). When the temperature rises to 980°C, keep the temperature under pressure for 300 seconds.

[0035] (4).Stop heating and perform cooling operation.

[0036] (5). Cool to 720°C under pressure, and the cooling rate is 170°C / min.

[0037] (6). Cool...

Embodiment 2

[0040] A method for manufacturing a double-cut diamond-impregnated block. The sintered layer 2 wraps natural diamond particles 1 on the surface of the impregnated block 5 through a hot-pressing impregnation sintering process; wherein the mass percentage of the sintered layer 2 components includes: tungsten carbide 55 %, cemented carbide 20%, nickel 5%, manganese 3%, copper alloy 17%; hot pressing dipping sintering process includes:

[0041] (1). Put the natural diamond particles 1, the sintered layer 2 powder and the impregnated agglomerate 5 into the corresponding positions of the graphite mold.

[0042] (2). Heating and applying pressure, the heating rate during heating is 80°C / min, and the applied pressure is 12Mpa.

[0043] (3). When the temperature rises to 900°C, keep the temperature under pressure for 250 seconds.

[0044] (4).Stop heating and perform cooling operation.

[0045] (5). Cool to 700°C under pressure, and the cooling rate is 150°C / min.

[0046] (6). Remov...

Embodiment 3

[0049] A method for manufacturing a double-cut diamond-impregnated block. The sintered layer 2 wraps natural diamond particles 1 on the surface of the impregnated block 5 through a hot-pressing impregnation sintering process; wherein the mass percentage of the sintered layer 2 components includes: tungsten carbide 30 %, cemented carbide 10%, nickel 12%, manganese 12%, copper alloy 36%; hot pressing dipping sintering process includes:

[0050] (1). Put the natural diamond particles 1, the sintered layer 2 powder and the impregnated agglomerate 5 into the corresponding positions of the graphite mold.

[0051] (2). Heating and applying pressure, the heating rate during heating is 120°C / min, and the applied pressure is 18Mpa.

[0052] (3). When the temperature rises to 1100°C, keep the temperature under pressure for 350 seconds.

[0053] (4).Stop heating and perform cooling operation.

[0054] (5). Cool to 750°C under pressure, and the cooling rate is 180°C / min.

[0055] (6). C...

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Abstract

The invention discloses a manufacturing method of a double-cutting diamond impregnated insert. Diamond particles are wrapped and embedded to the surface of an impregnated insert by a sintered layer through a thermocompression steeping sintering process. The sintered layer comprises the following components in percentage by weight: 30-55% of tungsten carbide, 10-20% of hard alloy, 5-12% of nickel, 3-12% of manganese and 17-36% of copper alloy. The thermocompression steeping sintering process comprises the following steps: putting the natural diamond particles, sintered layer powder and the impregnated inserts into a graphite die; heating at a heating speed of 80-120DEG C / min and applying a pressure of 12-18Mpa; when the temperature is increased to 900-1100DEG C, performing heat preservation for 250-350 seconds under pressure; cooling to 700-750DEG C at a cooling speed of 150-180DEG C / min under pressure; cooling to room temperature at a cooling speed of 150-180DEG C / min without pressure; tightly bonding the sequentially-arrayed impregnated inserts and the natural diamond particles together by virtue of the thermocompression steeping sintering process, so as to form an organic combination body with a double-layer cutting structure, so that the purpose of double-layer stepped cutting is realized.

Description

technical field [0001] The invention belongs to the field of cutting elements of diamond drill bits for oil and natural gas development, and in particular relates to a method for manufacturing double-cutting diamond impregnated inserts. Background technique [0002] Diamond impregnated blocks are widely used in drilling production as cutting elements of drill bits. They have the characteristics of high compression resistance, strong wear resistance and good impact resistance. They are suitable for drilling difficult to drill for PDC bits and roller cone bits. Difficult-to-drill formations with high hardness and high abrasiveness. In the prior art, diamond-impregnated agglomeration is to evenly distribute diamonds into the carcass and match the carcass with different hardness, so that it can drill into rocks of various hardness, especially rocks with medium hardness and above, and the drilling efficiency is high. High and low cost. The diamond particles impregnated with dia...

Claims

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Application Information

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IPC IPC(8): B22F7/06B22F1/00C22C29/08C22C30/02E21B10/46
Inventor 姚建林李巍李勇冯明付晓平刘志鹏何超胡畔刘彬李伟成
Owner CCDC PETROLEUM CORING TECH
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