Non-rotating plug

Details Non-rotating plug Non-rotating plug

1988-11-16

1989-06-06

Novosad, Stephen J.

Wells

Pistons, fluid driven into well

166155, 166291, 166317, E21B 1714, E21B 3316

Patent

active

048362794

ABSTRACT:
The plug set of the present invention comprises an upper plug having a non-rotation insert retained therein and a lower plug having longitudinal splines therein and a non-rotation insert on the bottom thereof.

REFERENCES:
patent: 2165433 (1939-07-01), Wickersham
patent: 3550683 (1970-12-01), Comeaux
patent: 3581817 (1971-06-01), Kammerer, Jr.
patent: 4175619 (1979-11-01), Davis
patent: 4190111 (1980-02-01), Davis
patent: 4190112 (1980-02-01), Davis
patent: 4711300 (1987-12-01), Wardlaw, III et al.

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