Wells – Valves – closures or changeable restrictors – Operated by dropped element
Patent
1982-10-27
1984-10-30
Leppink, James A.
Wells
Valves, closures or changeable restrictors
Operated by dropped element
166154, E21B 3313
Patent
active
044795459
ABSTRACT:
A dual-operating mode stage collar adapted to form part of a conduit string positionable in a well bore. Included is a tubular body having a side port with inner and outer openings. A first sleeve is axially shiftable relative to the body during one operating mode inside the body from one position closing the inner opening toward another position exposing it. A second internal sleeve is connected to an outer-port-closing slide through an aperture in the body and is axially shiftable as a unit relative to the body in a second operating mode from a position in which the slide and second sleeve are remote from the port toward another position in which the slide covers the outer port opening. In the preferred embodiment, the second sleeve covers the inner port opening as the slide covers the outer port opening.
REFERENCES:
patent: 2379079 (1945-06-01), Hayward
patent: 2633916 (1953-04-01), Baker et al.
patent: 2644526 (1953-07-01), Lee
patent: 2988145 (1961-06-01), Clark, Jr.
patent: 2998075 (1961-08-01), Clark
patent: 3053322 (1962-09-01), Kline
patent: 3148731 (1964-09-01), Holden
patent: 3223159 (1965-12-01), Brown
patent: 3381756 (1968-05-01), Reagan
patent: 3385370 (1968-05-01), Knox et al.
patent: 3464493 (1969-09-01), Chancellor et al.
patent: 3507325 (1970-04-01), Scott
patent: 3789926 (1974-02-01), Henley et al.
patent: 3948322 (1976-04-01), Baker
patent: 4047566 (1977-09-01), Duke
patent: 4176717 (1979-12-01), Hix
patent: 4260017 (1981-04-01), Nelson et al.
Leppink James A.
Starinsky Michael
LandOfFree
Well-cementing stage collar does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Well-cementing stage collar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Well-cementing stage collar will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1098781