Velocity operated standing valve

Details Velocity operated standing valve Velocity operated standing valve

F - Mech Eng,Light,Heat,Weapons

16

K

137/56

F16K 15/00 (2006.01) E21B 34/06 (2006.01) E21B 34/00 (2006.01)

Patent

CA 1146440

VELOCITY OPERATED STANDING VALVE ABSTRACT OF THE INVENTION A standing valve for controlling fluid flow through a well flow conductor. The standing valve allows for formation fluids to enter the flow conductor downhole and to flow in one direction to the well surface. The standing valve functions as a check valve to prevent fluids injected into the flow conductor at the well surface from flowing out the other end of the well flow conductor. The standing valve is operated by changes in the velocity of fluids flowing through the valve. When the pressure of fluid injected into the flow conductor from the well surface exceeds a preselected value, an alter- native flow path is opened within the standing valve to allow the injected fluid to flow in the other direction through the valve.

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