Downhole locking apparatus

Details Downhole locking apparatus Downhole locking apparatus

1983-02-22

1985-04-16

Novosad, Stephen J.

Wells

Expansible anchor or casing

Expansible means translated by wedge or cam

166382, 285 3, 285141, E21B 2302

Patent

active

045109958

ABSTRACT:
A locking apparatus for positioning a well tool within a subterranean well bore and comprising a primary locking member attached to the well tool; a nipple incorporable in a subterranean well conduit; and running and retrieving tools for positioning the lock member is disclosed. The lock has a no-go shoulder for initially positioning the lock adjacent the nipple and radially expandable locking dogs for carrying both upwardly and downwardly directed forces upon full expansion thereof after the no-go shoulder has been disengaged. At least two interlocking members disengagable only by separate manipulations maintain the locking dogs in a radially expanded fully engaged position. A retrieving tool having a rotational alignment means to position the tool relative to the lock is used to separately manipulate the interlocking members and to pull the disengaged lock from the well.

REFERENCES:
patent: 3130788 (1964-04-01), Cochran et al.
patent: 3208531 (1965-09-01), Tamplen
patent: 3633670 (1972-01-01), Brown et al.
patent: 3670821 (1972-06-01), Tamplen
patent: 3677346 (1972-07-01), Tamplen
patent: 3856081 (1974-12-01), Canalizo
patent: 4018275 (1977-04-01), Gaut
patent: 4043390 (1977-08-01), Glotin
patent: 4161984 (1979-07-01), Watkins
patent: 4254829 (1981-03-01), Watkins
patent: 4295528 (1981-10-01), Carmody
patent: 4353420 (1982-10-01), Miller

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