Wells – Packers or plugs – With expanding anchor
Patent
1990-11-08
1992-02-11
Neuder, William P.
Wells
Packers or plugs
With expanding anchor
166216, E21B 33128, E21B 33129
Patent
active
050868390
ABSTRACT:
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 interlock assembly includes running segments movable a limited distance on the mandrel to prevent jamming of the packer parts in response to mandrel rotation in a non-setting direction. The interlock assembly also includes locking segments having structure to fully seat the segments on the mandrel under load and to minimize packer element compression loss during setting. The packer has 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.
REFERENCES:
patent: 2720267 (1955-10-01), Brown
patent: 2720924 (1955-10-01), Brown
patent: 2795281 (1957-06-01), Christian
patent: 3279542 (1966-10-01), Brown
patent: 3467184 (1969-09-01), Young
patent: 4018274 (1977-04-01), Cochran
patent: 4524825 (1985-06-01), Fore
patent: 4671354 (1987-06-01), Henderson et al.
patent: 4844154 (1989-07-01), Ross et al.
Setterberg, Jr. John R.
White Pat M.
Neuder William P.
Otis Engineering Corporation
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