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Polycrystalline diamond cutters having non-catalytic material addition and methods of making the same

A technology of polycrystalline diamond and catalytic material, applied in the field of cutting tools made of polycrystalline diamond, can solve the problems of reducing and accelerating PCD cutting tools, etc.

Inactive Publication Date: 2018-08-03
DIAMOND INNOVATIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inverse conversion of diamond and stresses induced by thermal expansion coefficient mismatch can accelerate the reduction of toughness, wear resistance and / or thermal stability of PCD tools during operation

Method used

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  • Polycrystalline diamond cutters having non-catalytic material addition and methods of making the same
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  • Polycrystalline diamond cutters having non-catalytic material addition and methods of making the same

Examples

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Embodiment 3

[0087] Thermally stable polycrystalline diamond cutters according to the present disclosure were fabricated according to the parameters of Example 2, but with an addition of about 0.87 vol% lead to the diamond particles prior to the first HPHT process. The lead has a purity of about 99% and a median particle size of about 40 μm. The lead and diamond powders were dry blended for 1 hour using a TURBULA(R) blender. All other processing and finishing parameters were done according to Example 2 above. Catalytic material removal proceeded to complete leaching of the accessible interstitial cavities, about 70% faster than the PCD cutter of Example 2. A comparison of the weight loss of the Example 3 knives with the Example 2 knives evaluated after 7 days in equivalent leaching media and leaching conditions is described in Figure 7 middle.

[0088] VTL wear tests were performed on PCD tools according to the conditions listed in Table 1 above. After removing 28dm from the workpiece...

Embodiment 6

[0096] A leached double-pressed polycrystalline diamond tool was fabricated according to Example 3 above, with the addition of non-catalytic material, except that the median particle size of the diamond particles was about 21 μm and the non-catalytic material was prior to the first HPHT process About 0.5% lead addition by volume to the diamond particles. Catalytic material removal proceeded to complete leaching of the accessible interstitial cavities, about 40% faster than the PCD cutter of Example 2. A comparison of the weight loss of the knives of Example 6 with the knives of Examples 2 and 3, evaluated after 7 days in equivalent leaching media and leaching conditions, is described in Figure 7 middle. All other processing and finishing parameters were done according to Example 3 above.

[0097] VTL wear tests were performed on PCD tools according to the conditions listed in Table 1 above. After removing 28dm from the workpiece 3 At the end of the test of the material, P...

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Abstract

Polycrystalline diamond cutters for rotary drill bits and methods of making the same are disclosed. A polycrystalline diamond compact (100) includes a polycrystalline diamond body having a working surface, an interface surface, and a perimeter surface. The polycrystalline diamond compact also includes a substrate bonded to the polycrystalline diamond body along the interface surface. A non-diamondvolume fraction of the polycrystalline diamond body is greater at the interface surface than at the working surface.

Description

technical field [0001] The present disclosure relates generally to knives made of superabrasives, and more particularly to knives made of polycrystalline diamond with non-catalytic material additions for enhanced wear resistance, and methods of making the same. Background technique [0002] Polycrystalline diamond ("PCD") compacts are used in various mechanical applications, such as in material removal operations, as bearing surfaces, and in wire drawing operations. PCD compacts are commonly used in the petroleum industry to remove material in downhole drilling. The PCD compacts are formed into cutting elements, a number of which are attached to drill bits, eg, roller cone bits and fixed cutter bits. [0003] PCD tools typically contain a superabrasive diamond layer, known as a polycrystalline diamond body, which is attached to a substrate. Polycrystalline diamond bodies can be formed in a high pressure high temperature (HPHT) process in which the diamond grains are mainta...

Claims

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Application Information

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IPC IPC(8): B22F3/14B24D3/10C22C26/00B22F5/00
CPCB22F3/14B22F7/08B22F2005/001B24D18/0009B24D99/005C04B35/528C04B35/645C04B2235/3817C04B2235/3852C04B2235/3856C04B2235/40C04B2235/401C04B2235/427C04B2235/5436C04B2235/96C22C26/00E21B10/55E21B10/5735
Inventor 张凯
Owner DIAMOND INNOVATIONS INC