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Preparation process of diamond compact for PDC bit

A diamond composite sheet and a preparation process technology, which is applied in the field of preparation technology of diamond composite sheets for PDC drill bits, can solve the problems of non-abrasion resistance and chipping of diamond composite sheets, and reduce the possibility of non-abrasion resistance and chipping. The effect of high strength and good thermodynamic stability

Active Publication Date: 2019-01-01
TIANJIN LILIN BIT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a preparation process of diamond composite sheets for PDC drill bits, and solve the problems of non-wear resistance and chipping of diamond composite sheets

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation process of a diamond composite sheet for a PDC drill bit, comprising the steps of:

[0027] S1 Preparation of diamond powder: Put the diamond powder into the alloy tank and use ￠5mm and ￠10mm tungsten carbide balls of 1600g each for ball milling for 2 hours. Put the diamond powder into the material cylinder, then add 80% alcohol of the total weight of the diamond powder, seal the cylinder and add it to the ball mill to press the material for 6 hours, and then mix and dry through a three-dimensional mixer or an electric furnace to dry The dried diamond powder is placed in a vacuum furnace with a pressure of 0.1MPa for use;

[0028] S2 Preparation of rough diamond composite sheet: Weigh the diamond powder to be used in step S1 according to the height requirements of different composite layers, and put the weighed diamond powder into the No. 1 cemented carbide substrate according to the weight ratio cup, No. 2 cup and No. 3 cup. After the assembly is complet...

Embodiment 2

[0035] A preparation process of a diamond composite sheet for a PDC drill bit, comprising the steps of:

[0036] S1 Preparation of diamond powder: Put the diamond powder into the alloy tank and use ￠5mm and ￠10mm tungsten carbide balls of 1600g each for ball milling for 3 hours. Put the diamond powder into the material cylinder, then add alcohol with a total weight of 120% of the diamond powder, seal the cylinder and add it to the ball mill to press the material for 15 hours, and then mix and dry through a three-dimensional mixer or electric furnace to dry The dried diamond powder is placed in a vacuum furnace with a pressure of 0.1MPa for use;

[0037]S2 Preparation of rough diamond composite sheet: Weigh the diamond powder to be used in step S1 according to the height requirements of different composite layers, and put the weighed diamond powder into the No. 1 cemented carbide substrate according to the weight ratio cup, No. 2 cup and No. 3 cup. After the assembly is comple...

Embodiment 3

[0044] A preparation process of a diamond composite sheet for a PDC drill bit, comprising the steps of:

[0045] S1 Preparation of diamond powder: Put the diamond powder into the alloy tank and use ￠5mm and ￠10mm tungsten carbide balls of 1600g each for ball milling for 2.5 hours. The final diamond powder is added to the material tank, and then 100% alcohol of the total weight of the diamond powder is added. After the tank is sealed, it is added to the ball mill to press the material for 13 hours, and then mixed and dried by a three-dimensional mixer or electric furnace. The dried diamond powder is placed in a vacuum furnace with a pressure of 0.1MPa for use;

[0046] S2 Preparation of rough diamond composite sheet: Weigh the diamond powder to be used in step S1 according to the height requirements of different composite layers, and put the weighed diamond powder into the No. 1 cemented carbide substrate according to the weight ratio cup, No. 2 cup and No. 3 cup. After the as...

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PUM

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Abstract

The invention relates to a preparation process of a diamond compact for a PDC bit. The preparation process of the diamond compact for the PDC bit comprises the following steps that S1, diamond powderis prepared, specifically, the diamond powder is subjected to ball-milling through alloy tank ball-milling, the diamond powder which is subjected to ball-milling is cooled to below 300 DEG C and discharged after a purification process, the purified diamond powder is added into a material cylinder, alcohol is added, the cylinder is sealed, then the cylinder is added into a ball mill for ball-milling and material pressing, drying is carried out, and the dried diamond powder is placed into a vacuum furnace for later use; S2, a rough finished product of the diamond compact is prepared; and S3 a finished product of the diamond compact is prepared, specifically, the rough finished product of the diamond compact in the S2 step is subjected to rough grinding by a ceramic grinding wheel and heat treatment, then is subjected to fine grinding by a resin grinding wheel, then is put into ultrasonic waves for cleaning, is dried in the air, is baked on pyrophyllite, and is placed in a drying oven forstorage after baking is finished, so that the finished product is obtained. The preparation process of the diamond compact for the PDC bit has the advantages of simple preparation process, excellentperformance and good abrasion resistance.

Description

technical field [0001] The invention relates to the technical field of diamond composite sheets, in particular to a preparation process of a diamond composite sheet for a PDC drill bit. Background technique [0002] The diamond composite sheet is sintered with diamond micropowder and cemented carbide substrate under ultra-high pressure and high temperature conditions. It not only has the high hardness, high wear resistance and thermal conductivity of diamond, but also has the strength and impact toughness of cemented carbide. It is an ideal material for making cutting tools, drilling bits and other wear-resistant tools. [0003] Diamond composite sheet, also known as diamond and cemented carbide composite material, is sintered by 0.5-1.0mm thick diamond and a few millimeters thick WC / Co (tungsten carbide / cobalt) cemented carbide substrate under high temperature and high pressure. of. This material has the hardness and wear resistance of diamond, and has excellent impact re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/46
CPCE21B10/46
Inventor 薛中学
Owner TIANJIN LILIN BIT
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