Activation mechanism for differential fill floating equipment

Details Activation mechanism for differential fill floating equipment Activation mechanism for differential fill floating equipment

1987-04-29

1988-03-08

Leppink, James A.

Wells

Valves, closures or changeable restrictors

Destructible element

166318, 166327, 166332, E21B 3414

Patent

active

047294329

ABSTRACT:
A differential fill valve assembly for application in float collars or shoes in well casing. The valve assembly comprises a back pressure flapper valve disposed within a substantially tubular upper housing, and a lower housing containing an activating sleeve slidably disposed therein above a double flapper valve assembly. The activating sleeve initially extends into the upper housing to a sufficient extent to maintain the flapper valve in an open position and comprises a lower tubular sleeve surmounted by a circumferential ring of longitudinally upwardly extending collet fingers having radially inwardly extending shoulders thereon, said fingers and shoulders having elastomeric inserts extending therebetween; the activating sleeve is maintained in this position through use of shear pins, by which it is secured to a support ring associated with the lower housing. The double flapper valve comprises a first flapper responsive to pressure below the valve assembly, and a second flapper responsive to force applied from above. A tripping ball is dropped to seat on the shoulders in the activating sleeve when it is desired to release the back pressure flapper valve; pressure applied on the ball moves the activating sleeve downward, releasing the back pressure flapper valve and swinging the double flapper valve assembly out of the flow path through the differential fill assembly, after which the tripping ball exits the bottom of the assembly. Outward deformation of the collet ring maintains the activating sleeve in its lower position.

REFERENCES:
patent: 3054415 (1962-09-01), Baker et al.
patent: 3481397 (1969-12-01), Baker
patent: 3566962 (1971-03-01), Pease, Jr. et al.
patent: 4099451 (1978-07-01), Blackwell
patent: 4220206 (1980-09-01), Van Winkle
patent: 4355686 (1982-10-01), Arendt et al.
patent: 4474241 (1984-10-01), Freeman
patent: 4566541 (1986-01-01), Mouny et al.
Halliburton Services Sales and Service Catalog, No. 41, p. 3852.

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