发明名称 |
CUTTER GEOMETRY FOR INCREASED BIT LIFE AND BITS INCORPORATING THE SAME |
摘要 |
An improved cutter for fixed cutter drill bits includes a base portion with a longitudinal axis that extends through a center of the base portion and a cutting face which is generally centered with the base portion. The cutting face has a periphery edge geometry comprising a first arcuate segment and a second arcuate segment spaced apart and arranged opposite each other with linear edge segments disposed there between forming sides of the cutting face. The cutting face spans a maximum edge-to-edge dimension L in a first direction that corresponds to a major axis of the cutting face. The cutting face spans a maximum edge-to-edg e dimension W in a second direction, which is perpendicular to the first direction, and W is less than L.
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申请公布号 |
CA2595048(A1) |
申请公布日期 |
2008.01.24 |
申请号 |
CA20072595048 |
申请日期 |
2007.07.23 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
SHEN, YUELIN;ZHANG, YOUHE;CARIVEAU, PETER THOMAS;HUANG, SUJIAN J. |
分类号 |
E21B10/46;B23B51/00;E21B10/54 |
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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