Downhole locking apparatus

Details Downhole locking apparatus Downhole locking apparatus

1984-12-31

1986-04-22

Novosad, Stephen J.

Wells

Expansible anchor or casing

Expansible means translated by wedge or cam

166382, 285 3, 285141, E21B 2302

Patent

active

045835918

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 disengageable 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.

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patent: 3208531 (1965-09-01), Tamplen
patent: 3633670 (1972-01-01), Brown et al.
patent: 3670821 (1972-06-01), Tamplen
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patent: 4254829 (1981-03-01), Watkins
patent: 4295528 (1981-10-01), Carmody
patent: 4353420 (1982-10-01), Miller
patent: 4510995 (1985-04-01), Krause, Jr. et al.

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