Wells – Valves – closures or changeable restrictors – Fluid operated
Patent
1982-07-22
1984-07-24
Pate, III, William F.
Wells
Valves, closures or changeable restrictors
Fluid operated
137595, 166332, 166152, 166184, 166106, E21B 3410
Patent
active
044613539
ABSTRACT:
A retrievable well safety valve in a cased well system including a tubing string, a dual packer downhole around the tubing sealing with the casing and submersible pump in the tubing string below the packer.
The safety valve controls flow of pumped fluids through the tubing to surface and directs gas flow into the casing annulus above the packer. When the safety valve is landed in cooperating tubing nipples above the packer, separated central annular flow passages are formed for pumped fluids and gas respectively.
A ball valve in the central flow passage controls pumped fluid flow therethrough and an annular valve coupled to the ball valve controls gas flow from below the packer through the annular flow passage around and by the ball valve.
When the ball valve is in the down and open position, the valve ball member engages a lower seat, which maintains the central and annular flow passages separate and prevents comingling flow of fluids and gas.
The coupled valves are held open by pressured fluid from surface and are closed automatically on loss of pressure in their control fluid circuits.
When the valves close, a circuit of flow passages for recirculating pumped fluids and gas are opened below the ball valve and the pump may continue operation without overload.
REFERENCES:
patent: 2963089 (1960-12-01), Sizer
patent: 4049052 (1977-09-01), Arendt
patent: 4354554 (1982-10-01), Calhoun et al.
Hilts Robert L.
Meaders Michael W.
Speegle Steven C.
Vinzant Michael B.
Cox Roland O.
Otis Engineering Corporation
Pate III William F.
Starinsky Michael
LandOfFree
Well safety 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 Well safety valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Well safety valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-94535