| 发明名称 |
A THREAD JOINT FOR A DRILL STRING FOR PERCUSSIVE ROCK-DRILLING |
| 摘要 |
In percussion rock drilling a screw joint for a drill run or drill string including male and female screw threads (5, 9) on the elements (1, 2) are joined together to form a drill string. Within the screw joint the male thread (5) and the female thread (9) have a trapezoidal shape and a slight conical inclination. |
| 申请公布号 |
EP1511911(A1) |
申请公布日期 |
2005.03.09 |
| 申请号 |
EP20030723605 |
申请日期 |
2003.05.09 |
| 申请人 |
ATLAS COPCO SECOROC AB |
发明人 |
WAHLSTROEM, PATRIK;ERICSON, JOHAN |
| 分类号 |
E21B17/042;F16B33/02;(IPC1-7):E21B17/042 |
主分类号 |
E21B17/042 |
| 代理机构 |
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