发明名称 |
SLEEVE STRUCTURES FOR EARTH-BORING TOOLS, TOOLS INCLUDING SLEEVE STRUCTURES AND METHODS OF FORMING SUCH TOOLS |
摘要 |
Earth-boring tools comprise a bit body comprising a face and a plurality of blades extending radially outward over the face and forming gage regions. A shank is coupled to the bit body and includes a threaded portion for connecting to a drill string. A sleeve structure is positioned adjacent to the bit body and surrounds a portion of the shank, the sleeve structure extending from adjacent the bit body to proximate the threaded portion of the shank. An outer surface of the sleeve structure comprises a plurality of circumferentially spaced gage pads extending thereover and may comprise a plurality of breaker flats.
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申请公布号 |
US2009032309(A1) |
申请公布日期 |
2009.02.05 |
申请号 |
US20080182653 |
申请日期 |
2008.07.30 |
申请人 |
BAKER HUGHES INCORPORATED |
发明人 |
SCHWEFE THORSTEN;FINKE HENNING;GANZ THOMAS |
分类号 |
E21B17/10 |
主分类号 |
E21B17/10 |
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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