| 摘要 |
A retrievable packer is provided for wireline setting and tubing retrieval. A circumferentially extending shear member releases the retrievable packer from the wireline once the retrievable packer is set. A positive locking member releasably locks the upper and lower slips to the mandrel as they are wedged into gripping engagement with the casing string. The positive locking member includes a body lock ring which locks the upper slip assembly in a ratcheting engagement with the packer mandrel, and a J-latch which releasably secures the lower slip assembly to the mandrel.
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