发明名称 |
EARTH-BORING METAL MATRIX ROTARY DRILL BIT |
摘要 |
An earth-boring rotary drill bit includes a bit body, with a first region configured to carry a plurality of cutters for engaging a subterranean earth formation of a first particle-matrix composite material and a second region configured for attachment to a drill string of a second particle-matrix composite material having a second material composition, and an annular shank extending from the second region. Each of the first particle-matrix composite material and second particle-matrix composite material has a cast microstructure. A method of making an earth-boring rotary drill bit includes providing a plurality of hard particles in a mold to define a particle precursor; infiltrating the particle precursor sequentially with a plurality of molten matrix materials to form a corresponding plurality of layers, each comprising a particle-matrix mixture; and cooling the plurality of particle-matrix mixtures to solidify the matrix materials and form the bit body.
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申请公布号 |
US2010193255(A1) |
申请公布日期 |
2010.08.05 |
申请号 |
US20090534810 |
申请日期 |
2009.08.03 |
申请人 |
STEVENS JOHN H;EASON JIMMY W |
发明人 |
STEVENS JOHN H.;EASON JIMMY W. |
分类号 |
E21B10/54;E21B10/42;E21B10/55 |
主分类号 |
E21B10/54 |
代理机构 |
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