Ball valve safety screen

Details Ball valve safety screen Ball valve safety screen

1979-08-28

1981-09-01

Pate, III, William F.

Wells

Screen with valve, closure, changeable restrictor or portion...

166328, 210451, 175318, E21B 4308

Patent

active

042866596

ABSTRACT:
A device for preventing unwanted objects from entering the ball assembly of a float collar or float shoe and otherwise damaging or plugging the valve mechanism therein is disclosed. The device comprises a screen constructed of expanded metal and rigidly affixed to the interior of the float collar or float shoe above the ball valve assembly. The screen portion is either mounted to the interior surface of the float collar sleeve by an annular structural member or mounted to a structural band which is partially embedded in the concrete portion of the float collar or casing guide shoe.

REFERENCES:
patent: 1270274 (1918-06-01), Dunn
patent: 1859648 (1932-05-01), Baker
patent: 2153034 (1939-04-01), Baker
patent: 2217203 (1940-10-01), Hill
patent: 2654097 (1953-10-01), Epstein
patent: 3314481 (1967-04-01), Willman et al.

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