Injection valve, method and system
AssigneeBaker Hughes Oilfield Operations LLC
InventorYuh Loh
Life of this patent
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Abstract
An injection valve including a housing, a fluid channel in the housing, and a check valve disposed in the housing and responsive to fluid pressure in the channel to move the check valve in a direction opposite the direction of fluid flow through the channel. A method for injecting fluid into a volume including pressurizing a fluid to be injected, conveying the pressurized fluid to a space about a check valve between a check valve nose and a stem seal; and moving the check valve in a direction opposite a direction of injection fluid flow. A borehole system including a borehole in a subsurface formation, a string disposed within the borehole, and an injection valve disposed within or as a part of the string.
Claims13
An injection valve comprising:
- a housing;
- a fluid channel in the housing, the channel having an inlet and an outlet;
- a check valve disposed in a recess of the housing;
- a seal disposed about the check valve and in sealing contact with the housing;
- and
- wherein the check valve is exposed to fluid pressure from the outlet only on one side of the seal, the check valve responsive to the fluid pressure to move in a direction opposite the direction of fluid flow through the channel.
Dependencies are inferred from the claim text.