FLOW CONTROL VALVE AND METHOD
First Claim
1. A flow control valve, comprising:
- a body having a fluid passageway therethrough and first and second openings each adapted for receiving or discharging fluid from the passageway;
a piston slidably disposed in the passageway between the first and second openings of the body, the piston having a conduit portion that defines a bore therethrough for conducting fluid through a portion of the passageway, the bore having a reduced flow area; and
a plug carried within the body and equipped with one or more annular seals for sealably engaging the reduced flow area of piston bore so as to close the bore upon translatory movement of one of the piston, the plug, and combinations thereof.
1 Assignment
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Accused Products
Abstract
A flow control valve includes a body having a fluid passageway therethrough and first and second openings each adapted for receiving or discharging fluid from the passageway. A piston is slidably disposed in the passageway between the first and second openings of the body. The piston has a conduit portion that defines a bore therethrough for conducting fluid through a portion of the passageway. The bore has a reduced flow area. A plug is carried within the body and is equipped with one or more annular seals for sealably engaging the reduced flow area of piston bore so as to close the bore upon translatory movement of the piston, the plug, or a combination thereof. The flow control valve has particular application in downhole tools for communicating fluid into, out of, or through the downhole tool when disposed in a subsurface borehole.
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Citations
23 Claims
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1. A flow control valve, comprising:
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a body having a fluid passageway therethrough and first and second openings each adapted for receiving or discharging fluid from the passageway;
a piston slidably disposed in the passageway between the first and second openings of the body, the piston having a conduit portion that defines a bore therethrough for conducting fluid through a portion of the passageway, the bore having a reduced flow area; and
a plug carried within the body and equipped with one or more annular seals for sealably engaging the reduced flow area of piston bore so as to close the bore upon translatory movement of one of the piston, the plug, and combinations thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An assembly for pumping fluid at least partially through a downhole tool disposed in a borehole penetrating a subsurface formation, comprising:
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a pump for displacing fluid;
a first flow line equipped with at least one control valve for selectively communicating fluid to or from the pump; and
a second flow line equipped with at least one control valve for selectively communicating fluid to or from the pump;
each of the at least one control valves comprising;
a body having a fluid passageway therethrough and first and second openings each adapted for receiving or discharging fluid from the passageway;
a piston slidably disposed in the passageway between the first and second openings of the body, the piston having a conduit portion that defines a bore therethrough for conducting fluid through a portion of the passageway, the bore having a reduced flow area; and
a plug carried within the body and equipped with one or more annular seals for sealably engaging the reduced flow area of piston bore so as to close the bore upon translatory movement of one of the piston, the plug, and combinations thereof. - View Dependent Claims (12, 13)
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14. A method for controlling fluid flow through a passageway, comprising the steps of:
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slidably disposing a piston in the passageway, the piston having a conduit that reduces the flow area through the passageway;
selectively closing the conduit of the piston using a plug having one or more annular seals, the selective closing being achieved by movement of one of the piston, the plug, and combinations thereof. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification