| 发明名称 |
MULTI-SECTIONAL PERCUSSIVE DRILL BIT ASSEMBLY |
| 摘要 |
<p>A multi-sectional percussive drill bit assembly for drilling holes in earth formation primarily used in conjunction with a pneumatic percussive device. The drill bit assembly is comprised of an easily removable bit mat is rotationally driven by a lug and pocket structure and axially limited in travel by means of retaining members.</p> |
| 申请公布号 |
WO2007142672(A1) |
申请公布日期 |
2007.12.13 |
| 申请号 |
WO2006US39769 |
申请日期 |
2006.10.11 |
| 申请人 |
KEYSTONE DRILL SERVICES, INC. |
发明人 |
SMITH, RICHARD |
| 分类号 |
E21B10/36 |
主分类号 |
E21B10/36 |
| 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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