Wells – Packers or plugs – With expanding anchor
Patent
1976-05-12
1977-04-19
Leppink, James A.
Wells
Packers or plugs
With expanding anchor
166139, 166217, E21B 2300
Patent
active
040182754
ABSTRACT:
An improved anchoring device for well tools including installing and actuating apparatus for providing visual indication at the ground surface verifying proper latching and locking of the device in a casing string. The anchoring device includes a tubular housing assembly, a packer cup assembly secured to the lower portion of the housing assembly, an expansion sleeve slidably disposed within the housing assembly for forcing latching dogs radially outwardly from the housing assembly to engage an annular recess in the casing string, a setting sleeve longitudinally slidably disposed within the housing assembly telescopically related to the expansion sleeve and a lock sleeve releasably secured to the setting sleeve and telescopically related to the expansion sleeve. Three sets of cam-actuated dogs carried by the expansion sleeve react to the relative longitudinal displacement between the expansion sleeve, setting sleeve and lock sleeve to transfer upward force applied by a wire line to latch the anchoring device in the casing string, lock the device in the latched position and actuate the installing and actuating tool to positively indicate whether or not the anchoring device has been properly latched and locked in the casing string. Additional attachments are disclosed for use with the installing and actuating tool to adapt it for releasing and retrieving a properly or improperly latched and locked anchoring device from the casing string.
REFERENCES:
patent: 2871947 (1959-02-01), Fredd
patent: 3130788 (1964-04-01), Cochran et al.
patent: 3507329 (1970-04-01), Stone, Jr.
patent: 3789925 (1974-02-01), Brown
patent: 3856081 (1974-12-01), Canalizo
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