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.
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
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