| 摘要 |
An improved well packer for removeable installation in a well casing. A mandrel is associated with the packer for latching engagement with the well packer which can be released from the well packer by a simple rotation of the mandrel by no more than one-quarter turn. Arcuate 60 DEG segments of teeth are formed on opposing sides of the mandrel and contact ratchetable arcuate 60 DEG segments of teeth on opposing sides of the packer such that when the mandrel is moved longitudinally in relation to the packer, the ratchetable teeth can engage the fixed teeth on the mandrel. When it is desired to release the mandrel from the packer assembly, the mandrel is rotated no more than one-quarter turn and the mandrel teeth move out of engagement with the 60 DEG segment of the ratchetable teeth, thus disengaging the mandrel from the packer.
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