发明名称 |
Fixed-head bit with stabilizing features |
摘要 |
A fixed-head drill bit includes a bit body having a plurality of cutting elements and at least one wear knuckle disposed on the bit body. Each cutting element includes a cutting surface defining a swept cutting profile when the bit is rotated about an axis. The at least one wear knuckle is positioned at least partially within and extending at least partially outside a selected one or more of the swept cutting profiles, allowing the fixed-head drill bit to wear into a more stable configuration.
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申请公布号 |
US7308957(B2) |
申请公布日期 |
2007.12.18 |
申请号 |
US20050037553 |
申请日期 |
2005.01.18 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
CARIVEAU PETER THOMAS;DURAIRAJAN BALA;HUANG SUJIAN J. |
分类号 |
E21B10/46 |
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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