Fluid handling – Diverse fluid containing pressure systems – Gas lift valves for wells
Patent
1981-06-03
1983-08-16
Cohan, Alan
Fluid handling
Diverse fluid containing pressure systems
Gas lift valves for wells
251121, F04F 108
Patent
active
043985556
ABSTRACT:
A valve to control flow between outside and inside a tubular member. The valve is housed concentrically in an annular body around a tubular member and may be utilized mounted on an outside mandrel or in a side pocket mandrel which may be included in a well tubing string to control injection or lift gas flow from the well annulus into the tubing. Variable and staged flow restrictors upstream and downstream protect the resilient valve seal from flow cutting and opening closing stresses. The valve is balanced and is not urged to open by increasing outside pressure. The balanced valve minimizes difference between open and close pressures as opening pressure is very near closing pressure. An operating piston, in communication with outside and inside pressures, senses differential pressure and moves the valve axially to open when outside pressure is sufficiently higher than inside pressure. A compressed spring holds the valve closed and opening and closing pressures may be adjusted.
REFERENCES:
patent: 3398760 (1968-08-01), Fox
patent: 3523744 (1970-08-01), Holladay
Cohan Alan
Cox Roland O.
Otis Engineering Corporation
LandOfFree
Flow control 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 Flow control valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flow control valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-809418