- 专利标题： Cutting elements of gage row and first inner row of a drill bit
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申请号： US11494992申请日： 2006-07-28
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公开(公告)号： US20060260847A1公开(公告)日： 2006-11-23
- 发明人: Alan Lockstedt , Gary Portwood , Scott McDonough
- 申请人： Alan Lockstedt , Gary Portwood , Scott McDonough
- 申请人地址： US TX Houston
- 专利权人： Smith International, Inc.
- 当前专利权人： Smith International, Inc.
- 当前专利权人地址： US TX Houston
- 主分类号： E21B10/08
- IPC分类号： E21B10/08
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 gave curve such that its point of contact at gage is away from the thinner portion of the layer of super abrasive material.