发明名称 |
Cutting elements of gage row and first inner row of a drill bit |
摘要 |
A rolling cone drill bit is provided that has gage inserts on the first row from the bit axis to cut to full gage diameter that have a cutting portion enhanced with a layer of super abrasive material. The gage cutting surface has a center axis that is canted to be more normal to the gage curve such that its point of contact at gage is away from the thinner portion of the layer of super abrasive material.
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申请公布号 |
US7367413(B2) |
申请公布日期 |
2008.05.06 |
申请号 |
US20060494992 |
申请日期 |
2006.07.28 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
LOCKSTEDT ALAN W.;PORTWOOD GARY R.;MCDONOUGH SCOTT D. |
分类号 |
E21B10/36;E21B10/16;E21B10/52;E21B10/56;E21B10/567 |
主分类号 |
E21B10/36 |
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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