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PCD material with high diamond frame strength

A diamond and polycrystalline diamond technology, applied in the field of cutting elements, can solve the problems of PCD body fragmentation, partial cracking, falling off, etc.

Active Publication Date: 2016-01-20
SMITH INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, solvent metal catalysts are known to cause an unwanted catalytic phase transition of diamond with increasing temperature (where diamond is converted to carbon monoxide, carbon dioxide, or graphite), thereby limiting the practical application of PCD bodies to no more than about 750 ℃
[0006] Thermal degradation may cause chipping, spalling, partial cracking, and / or detachment of the PCD body
These problems may be caused by the formation of microcracks within the PCD body and subsequent crack propagation across the PCD body

Method used

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  • PCD material with high diamond frame strength
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  • PCD material with high diamond frame strength

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Embodiment Construction

[0024] The present disclosure relates to cutting elements comprising polycrystalline diamond bodies for subterranean drilling applications, and more particularly, to polycrystalline diamond bodies having high diamond framework strength, and methods for forming and evaluating such polycrystalline diamond bodies.

[0025] The following disclosure relates to various embodiments. The disclosed embodiments have broad application, and discussion of any embodiment is meant to be illustrative of that embodiment only, and is not intended to imply that the scope of the present disclosure, including the claims, is limited to that embodiment or limited to that embodiment. Characteristics.

[0026] Certain terms are used throughout the following specification and claims to refer to particular features or components. Those skilled in the art will appreciate that different people may refer to the same feature or component by different names. It is not intended herein to distinguish between...

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Abstract

The present disclosure relates to cutting elements comprising polycrystalline diamond bodies for subterranean drilling applications, and more particularly, to polycrystalline diamond bodies having high diamond framework strength, and methods for forming and evaluating such polycrystalline diamond bodies. A polycrystalline diamond body is provided having a top surface, a cutting edge meeting the top surface, and a first region comprising at least a portion of the cutting edge. The first portion exhibits a diamond frame strength of about 1200 MPa or greater, or 1300 MPa or greater.

Description

Background technique [0001] Polycrystalline diamond (PCD) materials known in the art are made from diamond grains (or crystals) and catalyst material subjected to high pressure and high temperature conditions ("HPHT" sintering process). The aforementioned PCD materials are known to have a high degree of wear resistance, making them a popular material choice for industrial applications like cutting tools for machining and wear and cutting elements in underground mining drilling where The aforementioned high degree of wear resistance. In the applications described above, conventional PCD materials can be provided in the form of a surface layer or body to impart the required level of wear resistance to the cutting tool. [0002] Traditionally, PCD cutting elements consist of a substrate and a PCD body or layer attached thereto. Substrates used in the cutting element applications described above include carbides such as cemented tungsten carbide (eg, WC-Co). The conventional PC...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/46C09K3/14C22C26/00
CPCB24D18/0009E21B10/46C23F1/02C23F1/28E21B10/567E21B10/55
Inventor F·于J·D·贝尔纳普
Owner SMITH INT INC