发明名称 |
HIGH-PRODUCTIVITY DRILL BITS |
摘要 |
Drill bits having flushing channels and surface features that cooperate to evacuate cuttings. The surface features can be provided as flutes, fins, and/or ribs defined in a body portion of the bits. Optionally, the surface features can define back-cutting edges the permit back reaming. |
申请公布号 |
WO2014204975(A1) |
申请公布日期 |
2014.12.24 |
申请号 |
WO2014US42760 |
申请日期 |
2014.06.17 |
申请人 |
LONGYEAR TM, INC. |
发明人 |
CASE, MICHAEL;HOGAN, JEFF;MATKAR, TUSHAR |
分类号 |
E21B10/42;E21B10/43;E21B10/62 |
主分类号 |
E21B10/42 |
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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