| 摘要 |
A method is disclosed for the cementing of casing in a well. The method involves lowering the casing into the wellbore, installing a device on a conduit and thereafter lowering the installed device and conduit to a predetermined position within the casing. The device is then actuated and fluid pressure is applied to the device to interlock the device with either the casing or an adapter previously inserted in the casing. Continued fluid pressure distends a seal member to isolate two regions of the casing. A cementing operation is then performed followed by closure of the device. Preferably, the conduit may then be retrieved for reuse.
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