System and method for downhole operation using pressure activated and sleeve valve assembly
First Claim
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1. An isolation system for a subterranean well, comprising:
- an isolation pipe, the isolation pipe being disposed within a base pipe, defining a volume between the base pipe and the isolation pipe;
a valve assembly coupled to the isolation pipe and comprising a pressure activated valve and a tool shiftable valve, the pressure activated valve being adapted to allow flow between the volume formed by the isolation pipe and the base pipe to an internal portion of the isolation pipe; and
wherein the valve assembly provides at least two independent flow paths in to and/or out of the isolation pipe.
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Abstract
An isolation system for producing oil and gas from one or more formation zones and methods of use are provided comprising one or more pressure activated and tool shiftable valve assemblies. The tool shiftable valve may be actuated before or after actuation of the pressure activated valve.
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Citations
17 Claims
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1. An isolation system for a subterranean well, comprising:
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an isolation pipe, the isolation pipe being disposed within a base pipe, defining a volume between the base pipe and the isolation pipe; a valve assembly coupled to the isolation pipe and comprising a pressure activated valve and a tool shiftable valve, the pressure activated valve being adapted to allow flow between the volume formed by the isolation pipe and the base pipe to an internal portion of the isolation pipe; and wherein the valve assembly provides at least two independent flow paths in to and/or out of the isolation pipe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 16, 17)
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10. A method for isolating a production zone of a well, comprising:
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inserting a pipe into the well, the pipe having a valve assembly comprising a pressure activated valve and a tool shiftable valve; shifting the tool shiftable valve while the valve assembly is disposed in the well; then opening the pressure activated valve by pressurized fluid acting on the pressure activated valve; and allowing production fluid to flow through the pressure activated valve, the tool shiftable valve, or a combination thereof. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification