Continuous orifice fill device

Details Continuous orifice fill device Continuous orifice fill device

1974-07-26

1976-12-07

Leppink, James A.

Wells

Valves, closures or changeable restrictors

Operated by dropped element

137515, E21B 4100

Patent

active

039956920

ABSTRACT:
The invention concerns down-hole apparatus for use especially in casing cementing operations wherein a so-called string of casing is lowered into a well bore and cemented in place. The apparatus comprises an insert, disposed across the interior of the casing, containing a spring loaded flapper valve assembly which is held open by a movable valve seating member until a ball is seated in the seating member and pressure applied through the casing to the sealed valve seating member forces the seating member downward, releasing the flapper valve, and expands the lower end of the seating member as the ball is forced through it. On release of the casing pressure from above, the flapper valve closes.
A plurality of the inventive devices may be placed along the casing, the ball valve sealing each, in turn, from top to bottom.

REFERENCES:
patent: 3275080 (1966-09-01), Nelson et al.
patent: 3289769 (1966-12-01), Nelson et al.
patent: 3292707 (1966-12-01), Nelson et al.

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