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Method for machining elliptic polycrystalline diamond for drilling

A technology of polycrystalline diamond and a processing method, which is applied in the process of applying ultra-high pressure and other directions, can solve the problems of difficulty in processing polycrystalline diamond into various shapes, low qualification rate, etc., and achieves significant economic benefits, high qualification rate, The effect of good thermal stability

Inactive Publication Date: 2012-09-19
ZHENGZHOU SANHE DIAMOND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to process polycrystalline diamonds of various shapes using existing techniques for synthesizing polycrystalline diamonds.
Even if various shapes can be produced, the pass rate is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The processing method of oval polycrystalline diamond for drilling of the present invention, the detailed steps of described processing method are as follows:

[0021] a, raw material composition: represented by weight percentage, the raw material adopted is composed of diamond powder 70%, silicon Si 14% and nickel Ni 16%;

[0022] 70% of the raw diamond powder is composed of three kinds of diamond powder W60, W35 and W10, and the weight percentages of W60, W35 and W10 in the raw diamond powder composition are 40%, 35% and 25% respectively .

[0023] B, according to the raw material composition described in step a, take by weighing raw material diamond powder, silicon and nickel, add the catalyst boron that accounts for 0.5% of raw material total amount in addition after mixing uniformly ， The mixed raw material and catalyst boron are packed into an elliptical carbon synthesis model, and then the carbon synthesis model with raw material and catalyst is placed in a vacu...

Embodiment 2

[0028] The processing method of oval polycrystalline diamond for drilling of the present invention, the detailed steps of described processing method are as follows:

[0029] a, raw material composition: expressed in weight percentage, the raw material adopted is composed of diamond powder 68%, silicon Si 15% and nickel Ni 17%;

[0030] 68% of the raw diamond powder is composed of three kinds of diamond powder W60, W35 and W10, of which the weight percentages of W60, W35 and W10 in the raw diamond powder composition are 40%, 35% and 25% respectively .

[0031] B, according to the raw material composition described in step a, take by weighing raw material diamond powder, silicon and nickel, add the catalyst boron that accounts for 0.48% of raw material total amount in addition after mixing uniformly ， The mixed raw material and catalyst boron are packed into an elliptical carbon synthesis model, and then the carbon synthesis model with raw material and catalyst is placed in a ...

Embodiment 3

[0036] The processing method of oval polycrystalline diamond for drilling of the present invention, the detailed steps of described processing method are as follows:

[0037] a, raw material composition: represented by weight percentage, the raw material adopted is composed of diamond powder 69%, silicon Si 14% and nickel Ni 17%;

[0038] 69% of the raw diamond powder is composed of three kinds of diamond powder W60, W35 and W10, of which the weight percentages of W60, W35 and W10 in the raw diamond powder composition are 40%, 35% and 25% respectively .

[0039] B, take by weighing raw material diamond powder, silicon and nickel according to the raw material composition described in step a, add the catalyst boron that accounts for 0.52% of raw material total amount in addition after mixing uniformly ， The mixed raw material and catalyst boron are packed into an elliptical carbon synthesis model, and then the carbon synthesis model with raw material and catalyst is placed in a...

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PUM

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Abstract

The invention provides a method for machining an elliptic polycrystalline diamond for drilling. The machining method comprises the following steps of: adding a certain amount of boron into diamond powder, silicon and metallic nickel serving as basic raw materials and mixing; adding the mixture into a carbon synthetic mold; putting the synthetic mold into a vacuum furnace; heating the synthetic mold in vacuum; putting semi-finished products heated in the vacuum into a diamond hexahedron press for high temperature and high pressure synthesis; and releasing the pressure after the high temperature and high pressure synthesis to obtain a product of the invention, namely the elliptic polycrystalline diamond TSP for drilling. The polycrystalline diamond TSP prepared by the technical scheme has the advantages of higher thermal stability, higher anti-impact strength, higher abrasion resistance, capability of meeting the requirement of complicated bottom layer drilling, and over 85 percent of high product yield.

Description

technical field [0001] The invention relates to a processing method of polycrystalline diamond, in particular to a processing method of elliptical polycrystalline diamond for drilling. Background technique [0002] Diamond polycrystalline PCD (Polycrystalline diamond) is sintered with fine-grain diamond single crystal under high temperature and high pressure. This product has good wear resistance, thermal stability, compressive strength and impact toughness, and is widely used in geological Exploration, oil extraction, natural gemstone processing industry and machining and dressing tools and other fields. At present, there are two types of synthetic diamond polycrystalline PCD and synthetic diamond polycrystalline TSP. The main shapes are triangular, square, rectangular, cylindrical, and arc-shaped at both ends, and its diversification is suitable for various drilling tools and geological requirements. [0003] At present, most of the polycrystalline diamond TSPs widely us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J3/06
Inventor 刘小选苏振岭
Owner ZHENGZHOU SANHE DIAMOND
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