Wells – Valves – closures or changeable restrictors – Fluid operated
Patent
1987-07-24
1988-08-30
Dang, Hoang C.
Wells
Valves, closures or changeable restrictors
Fluid operated
1374937, 166325, 166332, E21B 3410
Patent
active
047669608
ABSTRACT:
Standing valves which may be operated as injection valves without removal from a well conduit are disclosed. All disclosed valves permit upward production flow and prevent downward injection flow. One valve form utilizes a ball valve to control production and injection flow, and two valve forms utilize annular valves to control flow. In one annular valve form, production and injection flow is controlled by the annular valve. In the other annular valve form, production flow is controlled by check valve means and injection flow is controlled by the annular valve. These standing valves are opened for injection flow by increasing valve interior fluid pressure to a predetermined pressure to open control check valves permitting the pressured fluid to flow to pressure responsive operators in the valve housings. Opening pressure of the control check valves is variable. When injection pressure is reduced sufficiently, the operators are returned to injection valve closed position by a bias, and operating fluid returns from the operators through other check valves which permit flow from the operators back to the interior of the standing valves.
REFERENCES:
patent: 3066735 (1962-12-01), Zingg
patent: 3524503 (1970-08-01), Baker
patent: 3713490 (1973-01-01), Watson
patent: 3915228 (1975-10-01), Giebeler
patent: 4352366 (1982-10-01), Fisher, Jr.
patent: 4374543 (1983-02-01), Richardson
patent: 4441558 (1984-04-01), Welch et al.
patent: 4494608 (1985-01-01), Williams et al.
patent: 4664195 (1987-05-01), Deaton
patent: 4691777 (1987-09-01), Williamson, Jr.
patent: 4691778 (1987-09-01), Pyne
Cox Roland O.
Dang Hoang C.
Otis Engineering Corporation
LandOfFree
Standing and injection 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 Standing and injection valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Standing and injection valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2082583