Pump out sub

Details Pump out sub Pump out sub

1984-04-06

1985-04-16

Novosad, Stephen J.

Wells

Pistons, fluid driven into well

With stop

166317, 166193, E21B 3410

Patent

active

045109940

ABSTRACT:
A pump out sub for use in a well tubing for receiving a plug for sealing the tubing and applying pressure to the tubing for actuating a well device and thereafter applying a higher pressure to pump out the plug and open the bore. A circular ring is connected in a recess in the bore of the body by shear pins. An expandable seat is positioned in a second recess above the first recess and extends into the bore for receiving a plug and is positioned above and supported from the circular ring. When a plug is seated on the seat pressure may be applied to the tubing for actuating well tools. Thereafter additional pressure is applied to the plug and the ring and the seat moves downwardly and the seat expands into the first recess and out of the bore.

REFERENCES:
patent: 3051244 (1962-08-01), Litchfield
patent: 3090442 (1963-05-01), Cochran et al.
patent: 3131767 (1964-05-01), Chancellor et al.
patent: 3713490 (1973-01-01), Watson
patent: 4260017 (1981-04-01), Nelson et al.
patent: 4292988 (1981-10-01), Montgomery

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