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Diamond-silicon carbide combination drill teeth for petroleum probe boring and manufacture method thereof

A diamond and silicon carbide technology, which is applied in the field of high-strength nanostructure diamond-silicon carbide composite drill teeth and its preparation, can solve the problem of reduced thermal stability of polycrystalline diamond composite sheets, direct bonding between diamond particles and strong fractures, and diamond composite sheets. Cracks and other problems, to achieve the effect of improved fracture toughness, easy to grasp, and good thermal stability

Inactive Publication Date: 2008-12-17
贺端威 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is an obvious problem in the diamond compact of this structure: due to the different thermal expansion coefficients of diamond and metal catalyst, the thermal stability of the polycrystalline diamond compact is reduced
The difference in thermal expansion between the diamond and the metal catalyst at 350°C will cause the fracture of the direct bond between the diamond particles, and eventually lead to cracks and peeling of the diamond composite sheet
[0006] U.S. Patents US6939506B2, US 7060641B2, and US 2006 / 0217258A1 successively introduced high-temperature and high-pressure methods for preparing nanostructured diamond-silicon carbide composites with a Vickers hardness of at least 35GPa and a Knoop hardness of at least 30GPa. Silicon composite, its fracture toughness is 8~12MPa·m 1 / 2 , and just reached the fracture toughness of traditional polycrystalline diamond compacts

Method used

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  • Diamond-silicon carbide combination drill teeth for petroleum probe boring and manufacture method thereof
  • Diamond-silicon carbide combination drill teeth for petroleum probe boring and manufacture method thereof
  • Diamond-silicon carbide combination drill teeth for petroleum probe boring and manufacture method thereof

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Effect test

Embodiment 1

[0034] In this embodiment, the preparation method of diamond-silicon carbide composite drill teeth for oil drilling is as follows:

[0035] (1) material preparation

[0036] 3 grams of diamond powder with a grain size of 5 microns to 10 microns, 2 grams of diamond powder with nanoscale grains, 1.25 grams of silicon powder with a grain size of 1 micron to 20 microns, and 1 gram of carbon nanotube fiber; cylindrical tungsten carbide substrate ;

[0037] (2) Raw material processing and molding

[0038] Put the diamond powder and silicon powder in step (1) into a tungsten carbide vial with tungsten carbide balls after mixing. The vials were then placed in a CERTIPREP SPEX 8000-D high energy ball mill (Metuchen, NJ). The ball mill was located in a closed glove box purged with argon. The ball milling of the mixed powder is to ball mill all the silicon powder into amorphous amorphous silicon, which requires at least 10 hours of ball milling. The mixed powder after ball milling s...

Embodiment 2

[0045] In this embodiment, the preparation method of diamond-silicon carbide composite drill teeth for oil drilling is as follows:

[0046] (1) material preparation

[0047] 6 grams of diamond powder with a grain size of 5-10 microns, 1 gram of silicon powder with a grain size of 1-20 microns, and 0.75 grams of carbon nanotube fibers; cylindrical tungsten carbide substrate;

[0048] (2) Raw material processing and molding

[0049] Put the diamond powder and silicon powder in step (1) into a tungsten carbide vial with tungsten carbide balls after mixing. The vials were then placed in a CERTIPREP SPEX 8000-D high energy ball mill (Metuchen, NJ). The ball mill was located in a closed glove box purged with argon. The ball milling of the mixed powder is to ball mill all the silicon powder into amorphous amorphous silicon, which requires at least 10 hours of ball milling. The mixed powder after ball milling should be analyzed by X-ray diffraction to confirm whether the silicon p...

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Abstract

The invention relates to a diamond-silicon carbide composite drilling tooth used for oil drilling, the material of a substrate is hard alloy, and the material of a tooth crown is a diamond-silicon carbide compound in nano-structure. The microstructure of the diamond-silicon carbide compound in the nano-structure is formed by the direct combination of micron-sized diamond grains, and nano-silicon carbide binder and nano-diamond grains are filled in the slits of the micron-sized diamond grains. The preparation method of the composite drilling tooth comprises the steps that: diamond powder and silica powder are ground by a ball grinder after being mixed, then ground mixed powder material is mixed with carbon nanotube fiber to form diamond-amorphous silicon-carbon nanotube fiber mixed powder material which is put into a die, and the substrate is covered and treated with pressure forming to form a blank; high pressure sintering is carried out to the blank. The product greatly improves the fracture toughness and the anti-impact strength of the material on the premise of keeping the high hardness, high wearing resistance and high heat stability of the diamond-silicon carbide composite.

Description

technical field [0001] The invention belongs to the field of drill teeth for oil drilling, in particular to a high-strength nanostructure diamond-silicon carbide composite drill tooth with high temperature resistance, wear resistance and impact resistance and a preparation method thereof. Background technique [0002] Polycrystalline diamond compact has become the main material for manufacturing drill teeth for oil drilling due to its excellent mechanical properties such as extremely high hardness, wear resistance and impact resistance. [0003] Traditional polycrystalline diamond compacts are sintered by diamond particles and metal catalysts (such as iron, cobalt, nickel) under high temperature and high pressure conditions. In the sintered diamond composite sheet, the diamond particles form a direct bond between the particles, and the metal catalyst as a sintering aid remains in the gaps between the diamond particles. There is an obvious problem in the diamond compact of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/46C04B37/00
Inventor 赵予生贺端威王文丹
Owner 贺端威
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