Autonomous inflow control device and methods for using same
First Claim
1. A valve assembly for use in a wellbore, comprising:
- a housing for coupling to a production tubular;
a chamber defined within the housing and in fluid communication with an interior of the production tubular and an exterior of the production tubular;
a piston and a biasing member disposed within the chamber, the biasing member being adapted to bias the piston into a first position; and
first and second flowpaths defined within the housing and providing paths of fluid communication between the interior of the production tubular and the exterior of the production tubular, the first and second flowpaths each having one or more flow restrictions disposed therein for providing a pressure drop across the one or more flow restrictions, wherein the first and second flowpaths each extend from the exterior of the production tubular, around the piston, and converge to a single flowpath proximate the interior of the production tubular when the piston is in the first position, wherein the piston is configured to move from the first position to a second position when a pressure differential between the interior of the production tubular and the exterior of the production tubular exceeds a predetermined amount at least partially in response to the pressure drop from the one or more flow restrictions, and wherein flow from the exterior of the production tubular to the interior of the production tubular through the valve assembly is increasingly restricted as the piston moves from the first position to the second position.
1 Assignment
0 Petitions
Accused Products
Abstract
A valve assembly for regulating fluid flow in a horizontal wellbore. A housing can be coupled to a production tubular. A chamber is defined within the housing and can be in fluid communication through a flow channel with an inner annulus formed adjacent the wellbore. A piston and a biasing member can be disposed within the chamber, where the biasing member biases the piston into a first position. A flowpath is defined within the housing and communicable with both the production tubular and the inner annulus. The flowpath can include one or more nozzles disposed therein, and the piston can be configured to move between the first position allowing fluid flow through the flowpath to the production tubular and a second position preventing fluid flow to the production tubular.
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Citations
26 Claims
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1. A valve assembly for use in a wellbore, comprising:
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a housing for coupling to a production tubular; a chamber defined within the housing and in fluid communication with an interior of the production tubular and an exterior of the production tubular; a piston and a biasing member disposed within the chamber, the biasing member being adapted to bias the piston into a first position; and first and second flowpaths defined within the housing and providing paths of fluid communication between the interior of the production tubular and the exterior of the production tubular, the first and second flowpaths each having one or more flow restrictions disposed therein for providing a pressure drop across the one or more flow restrictions, wherein the first and second flowpaths each extend from the exterior of the production tubular, around the piston, and converge to a single flowpath proximate the interior of the production tubular when the piston is in the first position, wherein the piston is configured to move from the first position to a second position when a pressure differential between the interior of the production tubular and the exterior of the production tubular exceeds a predetermined amount at least partially in response to the pressure drop from the one or more flow restrictions, and wherein flow from the exterior of the production tubular to the interior of the production tubular through the valve assembly is increasingly restricted as the piston moves from the first position to the second position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for regulating a flowrate in a wellbore, comprising:
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arranging a valve assembly in the wellbore, the valve assembly having a housing defining a chamber in fluid communication with an interior of a production tubular and an exterior of the production tubular, wherein a piston and a biasing member are disposed within the chamber; flowing a fluid through first and second flowpaths defined within the housing, wherein the first and second flowpaths extend from the exterior of the production tubular, around the piston, and converge to a single flowpath proximate the interior of the production tubular when the piston is in a first position, the first and second flowpaths each having one or more nozzles disposed therein; biasing the piston into the first position using the biasing member disposed within the chamber; and axially translating the piston within the chamber towards a second position to obstruct the single flowpath when a pressure differential between the interior of the production tubular and the exterior of the production tubular exceeds a predetermined amount. - View Dependent Claims (16, 17, 18)
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19. A valve assembly for use in a wellbore, comprising:
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a housing for coupling to a production tubular; a chamber defined within the housing and having a first end in fluid communication with an exterior of the production tubular and a second end in fluid communication with an interior of the production tubular through a first opening in the production tubular; a flowpath defined within the housing to place the exterior of the production tubular in fluid communication with the interior of the production tubular through a second opening in the production tubular; a nozzle disposed within the flowpath; a piston disposed within the chamber and adapted to move radially with respect to the production tubular, the piston having a pressure end, a biasing end, and a central portion of reduced cross-section disposed between the pressure and biasing ends; and a biasing member disposed adjacent the second end of the chamber and adapted to bias the piston into a first position, wherein the piston is configured to move between the first position allowing fluid flow through the flowpath to the production tubular and a second position preventing fluid flow to the production tubular when a pressure differential between the interior of the production tubular and the exterior of the production tubular exceeds a predetermined amount. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A valve assembly, comprising:
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a first flow path in fluid communication with an interior of a production tubular and an exterior of the production tubular; a moveable piston disposed in the first flow path and adapted to prevent fluid flow therethrough, wherein a first side of the piston is in fluid communication with the interior of the production tubular, and wherein a second side of the piston is in fluid communication with the exterior of the production tubular; a biasing element coupled to the piston and adapted to bias the piston into an open position; a second flow path in fluid communication with the interior of the production tubular and the exterior of the production tubular, wherein the second flow path has one or more static flow restriction elements disposed therein, and wherein the second flow path is unobstructed by the piston when the piston is in the open position, wherein when a differential pressure between the interior of the production tubular and the exterior of the production tubular exceeds a given value, the piston shifts from the open position to a closed position where the piston at least partially obstructs the second flow path, and wherein the differential pressure is in response to a fluid flow through a reservoir in communication with the exterior of the production tubular and a pressure on the interior of the production tubular. - View Dependent Claims (26)
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Specification