Wells – Processes – Cementing – plugging or consolidating
Patent
1988-05-16
1989-11-14
Dang, Hoang C.
Wells
Processes
Cementing, plugging or consolidating
166154, 166237, 166291, 166323, E21B 3316, E21B 3414
Patent
active
048800589
ABSTRACT:
A stage valve for stage cementing of casings in a well bore including a tubular collar and a telescopic tubular sleeve where the sleeve has a piston portion disposed in a collar chamber and the piston portion separates a sleeve port from a collar port in a lower position. In the lower position, the sleeve mechanically engages the collar and is movable to an upper position by a differential hydraulic pressure across the piston portion to an upper position placing the sleeve port and the collar port in fluid communication with one another. In moving to the upper position, the sleeve removes a barrier from a ratchet ring in the collar so that when the sleeve is moved downwardly from an upper position, a ratchet portion on the sleeve engages the ratchet ring in a lower position of the sleeve to lock the sleeve in a closed position.
REFERENCES:
patent: 2855952 (1958-10-01), Tausch et al.
patent: 2947363 (1960-08-01), Sackett et al.
patent: 3970147 (1976-07-01), Jessup et al.
patent: 4113012 (1978-09-01), Evans et al.
patent: 4403659 (1983-09-01), Upchurch
patent: 4576233 (1986-03-01), George
patent: 4603741 (1986-08-01), Edgmon
patent: 4671358 (1987-06-01), Lindsey, Jr. et al.
Adams Richard W.
Lindsey Hiram E.
Dang Hoang C.
Lindsey Completion Systems, Inc.
LandOfFree
Stage cementing valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Stage cementing valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stage cementing valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1847804