发明名称 |
Drill bit inserts with zone of compressive residual stress |
摘要 |
A cutter element for use in a drill bit, has a substrate comprising a grip portion and an extension and at least a cutting layer affixed to said substrate. The cutting layer has a cutting surface and an interface surface, and the cutting surface includes a region of residual compressive stress, which functions as a preload or prestress so as to offset the effect of localized loading due to contact with the formation during drilling.
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申请公布号 |
US6260639(B1) |
申请公布日期 |
2001.07.17 |
申请号 |
US19990293372 |
申请日期 |
1999.04.16 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
YONG ZHOU;HUANG S. J. |
分类号 |
E21B10/56;E21B10/567;E21B10/573;(IPC1-7):E21B10/46 |
主分类号 |
E21B10/56 |
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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