发明名称 |
Rotary Drag Bit with Pointed Cutting Elements |
摘要 |
In one aspect of the invention a rotary drag bit has a bit body intermediate a shank and a working surface. The working surface has a plurality of blades converging at a center of the working surface and diverging towards a gauge of the working surface. At least one blade has a cutting element with a carbide substrate bonded to a diamond working end with a pointed geometry. The diamond working end has a central axis which intersects an apex of the pointed geometry such that the axis is oriented within a 15 degree rake angle.
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申请公布号 |
US2008314647(A1) |
申请公布日期 |
2008.12.25 |
申请号 |
US20070766975 |
申请日期 |
2007.06.22 |
申请人 |
HALL DAVID R;CROCKETT RONALD;BAILEY JOHN |
发明人 |
HALL DAVID R.;CROCKETT RONALD;BAILEY JOHN |
分类号 |
E21B10/46 |
主分类号 |
E21B10/46 |
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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