发明名称 |
CUTTING ELEMENTS FORMED FROM ULTRA HARD MATERIALS HAVING AN ENHANCED CONSTRUCTION |
摘要 |
Cutting elements of this invention include an ultra hard body joined with a metallic substrate. The body includes an uppermost layer comprising a plurality of bonded ultra hard crystals and interstitial regions, and that defines a body working surface. The uppermost layer includes an outer region that is relatively more thermally stable than a remaining portion of the uppermost layer. The body further includes an intermediate layer joined to the uppermost layer, comprising a plurality of bonded ultra hard crystals, and having a wear resistance less than that of the uppermost layer remaining region. The body may additionally include a lowermost PCD layer that is interposed between and attached to the intermediate layer and the substrate. |
申请公布号 |
CA2533356(C) |
申请公布日期 |
2013.12.31 |
申请号 |
CA20062533356 |
申请日期 |
2006.01.20 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
BELNAP, JOHN DANIEL;MIDDLEMISS, STEWART N. |
分类号 |
E21B10/46;E21B10/50 |
主分类号 |
E21B10/46 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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