Locking device for securing a tool in a well conduit

Details Locking device for securing a tool in a well conduit Locking device for securing a tool in a well conduit

1988-05-25

1989-07-04

Novosad, Stephen J.

Wells

Expansible anchor or casing

Spring set

166382, 166385, E21B 2302

Patent

active

048441597

ABSTRACT:
The invention is directed to a locking mechanism for locking a tool to an anchor seat located in the tubing of a well, the locking mechanism comprising keys which are radially movable relative to the axis of the tool, the keys emerging via apertures in the body of the tool to engage in a groove of an anchor seat located in the well conduit. The groove of the anchor seat has an internal diameter smaller than the internal diameter of the well conduit. Each key is axially movable within the aperture between a high position and a low position. Structure is provided for retaining the keys in the high position, positioning the keys in a radially retracted position, so that the keys do not cause the tool to be secured in the anchor seat. Structure is also provided for positioning the keys in a radially extended position, causing the keys to contact the groove of the anchor seat, thereby locking the tool to the anchor seat.

REFERENCES:
patent: 2605843 (1952-08-01), Baker
patent: 2894586 (1959-07-01), Schramm et al.
patent: 2976931 (1961-03-01), Daffin
patent: 3330341 (1967-07-01), Jackson, Jr. et al.
patent: 4167970 (1979-09-01), Cowan
patent: 4362211 (1982-12-01), Fisher, Jr.
patent: 4469173 (1984-09-01), Gilbert et al.
patent: 4554972 (1985-11-01), Merritt
patent: 4624311 (1986-11-01), Goad
patent: 4745974 (1988-05-01), Higgins

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