发明名称 |
Cutter element with non-linear, expanded crest |
摘要 |
A cutter element for a drill bit has a non-rectilinear crest. The cutter element has a base portion and an extending portion and the extending portion has either a zero draft or a negative draft with respect to the base portion. The non-positive draft allows more of the borehole bottom to be scraped using fewer cutter elements. The cutter elements having non-positive draft can be either tungsten carbide inserts or steel teeth.
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申请公布号 |
US2001025728(A1) |
申请公布日期 |
2001.10.04 |
申请号 |
US20010858160 |
申请日期 |
2001.05.15 |
申请人 |
MINIKUS JAMES C.;CAWTHORNE CHRIS E.;STEINKE STEPHEN C.;PORTWOOD GARY R.;GARCIA GARY E.;MORAN DAVID P. |
发明人 |
MINIKUS JAMES C.;CAWTHORNE CHRIS E.;STEINKE STEPHEN C.;PORTWOOD GARY R.;GARCIA GARY E.;MORAN DAVID P. |
分类号 |
E21B10/16;E21B10/52;(IPC1-7):E21B10/08 |
主分类号 |
E21B10/16 |
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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