Releasable latch for downhole well tools

Details Releasable latch for downhole well tools Releasable latch for downhole well tools

1984-10-29

1986-02-18

Novosad, Stephen J.

Wells

Expansible anchor or casing

Spring set

285 26, 285 86, 2851372, E21B 2300

Patent

active

045707073

ABSTRACT:
A latch for releasably anchoring well tools at a preselected downhole location within a well bore. The latch includes collet heads which are sized to be received within an annular recess. The downhole location is defined by the annular recess and a no-go shoulder which limits the movement of the latch into the well bore. The latch is activated by application of force in one direction after contact with the no-go shoulder. A first set of pins is sheared during activation of the latch to prevent retraction of the collet heads from the recess. A second set of pins is sheared by applying force in the opposite direction to allow release of the collet heads from the recess.

REFERENCES:
patent: 2862560 (1958-12-01), Bostock et al.
patent: 3167127 (1965-01-01), Sizer
patent: 3326292 (1967-06-01), Young et al.
patent: 3330360 (1967-07-01), Young
patent: 3381752 (1968-05-01), Elliston
patent: 3391741 (1968-07-01), Elliston
patent: 3450205 (1969-06-01), Current
patent: 3934648 (1976-01-01), Amancharla
patent: 4236734 (1980-02-01), Ahangarzadeh
patent: 4290483 (1981-09-01), Lawson
patent: 4399873 (1981-06-01), Lindsey
patent: 4436325 (1984-03-01), Miller
patent: 4457368 (1984-07-01), Knierimen et al.

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