| 摘要 |
A well packer for sealing an annular space within a well bore around a tubing string including a tubular mandrel, an expandable seal assembly on the mandrel for sealing around the mandrel with a well bore wall, a slip assembly on the mandrel for releasably locking the packer with the well bore wall, a drag spring and slip carrier assembly around the slip assembly, and an interlock assembly for selectively coupling the drag spring and slip carrier assembly with the mandrel for operating the packer through running, set, and release modes. The packer also includes an emergency release feature for releasing the packer in the event that well obstructions or other problems prevent normal rotation of the tubing string and mandrel to operate the interlock assembly. |
