| 发明名称 |
NON-ROTATING STABILIZER FOR RAISE BORING |
| 摘要 |
<p>4273-A NON-ROTATING STABILIZER FOR RAISE BORING A non rotating stabilizer for raise boring having a diameter substantially equal to the raise head and which is positioned below the raise head so as to follow it as the hole is bored is disclosed. A second raise head having a larger diameter than the stabilizer may be positioned below the stabilizer.</p> |
| 申请公布号 |
CA1131612(A) |
申请公布日期 |
1982.09.14 |
| 申请号 |
CA19800358819 |
申请日期 |
1980.08.22 |
| 申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
HARRISON, SIMON J.;PIVIDOR, ENEA R. |
| 分类号 |
E21B7/28;E21B10/28;E21B17/10;(IPC1-7):E21B17/10;E21D3/00 |
主分类号 |
E21B7/28 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
