| 发明名称 |
EARTH BORING DRILL BITS WITH USING OPPOSED KERFING FOR CUTTERS |
| 摘要 |
A drill bit configured having eight blades thereon with secondary cutters on four blades using opposed kerfing for the secondary cutters located on four of the blades. |
| 申请公布号 |
WO2010014725(A2) |
申请公布日期 |
2010.02.04 |
| 申请号 |
WO2009US52124 |
申请日期 |
2009.07.29 |
| 申请人 |
BAKER HUGHES INCORPORATED;SCHWEFE, THORSTEN |
发明人 |
SCHWEFE, THORSTEN |
| 分类号 |
E21B10/43 |
主分类号 |
E21B10/43 |
| 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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