Wells – Detents or clutches
Patent
1980-03-07
1981-05-05
Pate, III, William F.
Wells
Detents or clutches
166214, E21B 2302
Patent
active
042653061
ABSTRACT:
A latch for anchoring well tools in landing receptacles such as nipples or side pocket mandrels in well flow conductors, the receptacles having a locking recess providing a lock shoulder which may be fully annular or only 180 degrees in extent. The latch includes a housing having windows in the wall thereof and a locking lug in each window movable both radially and axially of the housing to engage and disengage the receptacle lock shoulder. A spring biases the lugs downwardly. A lock sleeve slidable on a central core normally holds the lugs against inward movement from expanded locking position and has a recess in its outer surface which allows the lugs to move up and retract thereinto to pass obstructions in a well, the spring returning the lugs to expanded position as soon as such obstruction has been passed. Shearing a pin permits the lock sleeve to be lifted to a position to allow the lugs to retract freely. In a modified embodiment of the invention, the device includes a core which is slidable and which is operationally associated with the well tool supported by the device and performs a function therein.
REFERENCES:
patent: 2401119 (1946-05-01), Taylor, Jr.
patent: 3088521 (1963-05-01), Graves
patent: 3207222 (1965-09-01), Tamplen
patent: 3741303 (1973-06-01), Terral
Carroll Albert W.
Otis Engineering Corporation
Pate III William F.
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