发明名称 |
ANORDNING FOR SENKNING OCH UPPTAGNING AV ETT KERNROR |
摘要 |
A lowering and retrieving system that may be used when core drilling, either up or down, including drilling at any inclination. A flexible seal element is mounted around the periphery of a lowering and retrieving device and looped over a pin on a movable actuator element. The flexible seal element forms a fluid seal with a hollow drill string allowing the lowering and retrieving device to be pumped through the drill string. An elongated spear head on a retractable core barrel contacts and moves the movable actuator element thereby changing the position of the flexible seal element and a fluid channel around the lowering and retrieving device is opened. |
申请公布号 |
SE405492(B) |
申请公布日期 |
1978.12.11 |
申请号 |
SE19720009428 |
申请日期 |
1972.07.18 |
申请人 |
* DRESSER INDUSTRIAL PRODUCTS LTD |
发明人 |
T O * WOLDA * ORILLIA |
分类号 |
E21B23/02;E21B25/02;(IPC1-7):21B25/00 |
主分类号 |
E21B23/02 |
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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