发明名称 |
Drilling apparatus, method, and system |
摘要 |
A helical drag bit provided with spirally/helically positioned cutting arms. The arms can create a spiral trench geometry in the sidewall of a predrilled pilot hole. The cutting arms can terminate in scoring cutting blades. The helical drag bit can be incorporated into a system and method for measuring geo-tech characteristics. The helical drag bit can be used in a system and method for improving the holding capacity of rock bolts and similar devices for use in the mining industry or in any circumstances where a particulate substrate may benefit from support. Novel rock bolts having new structures can be used with this improved hole geometry or may form such improved hole geometry.
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申请公布号 |
US2005039952(A1) |
申请公布日期 |
2005.02.24 |
申请号 |
US20040919271 |
申请日期 |
2004.08.17 |
申请人 |
HILL JOHN L.;BRENNAN MIKE;SHENHAR JORAM;KOCH DAVID;LOMBARDO MARK;DOLGIN BENJAMIN;GIRALDO LUIS |
发明人 |
HILL JOHN L.;BRENNAN MIKE;SHENHAR JORAM;KOCH DAVID;LOMBARDO MARK;DOLGIN BENJAMIN;GIRALDO LUIS |
分类号 |
E21B10/44;E21D21/00;(IPC1-7):E21B10/40;E21B10/36 |
主分类号 |
E21B10/44 |
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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