| 发明名称 |
PUMP PLUG FOR USE IN WELL OPERATIONS |
| 摘要 |
<p>PUMP PLUG FOR USE IS WELL OPERATIONS Pump plug for use in well operations, including a sleeve (2) provided with annular sealing fins (4), which fins (4) are flexible in both directions of the central axis of the sleeve (2). Support means (5) are mounted on the sleeve (2) for supporting the sealing fins (4) in each of the flexed positions thereof. Figure 1.</p> |
| 申请公布号 |
CA1163553(A) |
申请公布日期 |
1984.03.13 |
| 申请号 |
CA19810385797 |
申请日期 |
1981.09.14 |
| 申请人 |
SHELL CANADA LIMITED |
发明人 |
APPEL, CORNELIS;KUILMAN, BARTEL |
| 分类号 |
E21B23/10;E21B37/10;F16J15/32;(IPC1-7):E21B23/08 |
主分类号 |
E21B23/10 |
| 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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