Selective no-go apparatus

Details Selective no-go apparatus Selective no-go apparatus

1981-10-02

1983-09-27

Novosad, Stephen J.

Wells

Expansible anchor or casing

Spring set

166217, 166237, 166381, E21B 2302

Patent

active

044063253

ABSTRACT:
A no-go apparatus for positioning a tool within a landing nipple in a tubing string in a subterranean well includes a mandrel axially movable within the tubing string having selectively radially expandable latches for engaging a specially shaped annular groove formed on the inside cylindrical surface of the landing nipple, thereby preventing downward movement of the latches and mandrel past the groove. The latches are configured to prevent their engagement by any groove or projections in the tubing string other than the correspondingly shaped groove.

REFERENCES:
patent: Re25289 (1962-11-01), Fredd
patent: 3472530 (1969-10-01), Fowler
patent: 3568770 (1971-03-01), Fredd
patent: 3893717 (1975-07-01), Nelson
patent: 3912009 (1975-10-01), Davis, Jr.
patent: 3918747 (1975-11-01), Putch
patent: 4005751 (1977-02-01), Page, Jr.
patent: 4167970 (1979-09-01), Cowan
patent: 4276932 (1981-07-01), Saliges et al.

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