发明名称 |
Earth-boring rotary drill bits and methods of manufacturing earth-boring rotary drill bits having particle-matrix composite bit bodies |
摘要 |
Methods of forming bit bodies for earth-boring bits include assembling green components, brown components, or fully sintered components, and sintering the assembled components. Other methods include isostatically pressing a powder to form a green body substantially composed of a particle-matrix composite material, and sintering the green body to provide a bit body having a desired final density. Methods of forming earth-boring bits include providing a bit body substantially formed of a particle-matrix composite material and attaching a shank to the body. The body is provided by pressing a powder to form a green body and sintering the green body. Earth boring Earth-boring bits include a unitary structure substantially formed of a particle-matrix composite material. The unitary structure includes a first region configured to carry cutters and a second region that includes a threaded pin. Earth-boring bits include a shank attached directly to a body substantially formed of a particle-matrix composite material.
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申请公布号 |
US2007102199(A1) |
申请公布日期 |
2007.05.10 |
申请号 |
US20050272439 |
申请日期 |
2005.11.10 |
申请人 |
SMITH REDD H;STEVENS JOHN H;DUGGAN JAMES L;LYONS NICHOLAS J;EASON JIMMY W;GLADNEY JARED D;OXFORD JAMES A;CHREST BENJAMIN J |
发明人 |
SMITH REDD H.;STEVENS JOHN H.;DUGGAN JAMES L.;LYONS NICHOLAS J.;EASON JIMMY W.;GLADNEY JARED D.;OXFORD JAMES A.;CHREST BENJAMIN J. |
分类号 |
E21B10/00 |
主分类号 |
E21B10/00 |
代理机构 |
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