发明名称 |
Diamond cutting structure for drilling hard subterranean formations |
摘要 |
A rotary drag bit for drilling hard rock formations with substantially planar PDC cutting elements having diamond tables backed by substrates which flare or taper laterally outwardly and rearwardly of the cutting edge of the diamond table. A cutting structure defining a "lipped" cutting edge is also disclosed. |
申请公布号 |
GB2276645(B) |
申请公布日期 |
1996.10.23 |
申请号 |
GB19940001586 |
申请日期 |
1994.01.25 |
申请人 |
* BAKER HUGHES INCORPORATED |
发明人 |
NIGEL C * MEANY;CRAIG H * COOLEY;GORDON A * TIBBITTS |
分类号 |
E21B10/56;E21B10/567;E21B10/573;(IPC1-7):E21B10/46 |
主分类号 |
E21B10/56 |
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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