Formation isolation valve
First Claim
Patent Images
1. An assembly usable in a subterranean well, comprising:
- a valve adapted to selectively isolate a region of the well;
a sleeve adapted to be moved by a downhole tool to cause the valve to transition from a first state to a second state; and
an index mechanism to prevent the valve from transitioning from the first state to the second state until after a position of the sleeve follows a predefined pattern.
1 Assignment
0 Petitions
Accused Products
Abstract
An assembly that is usable in a subterranean well includes a valve, a sleeve and an index mechanism. The valve is adapted to selectively isolate a region of the well, and the sleeve is adapted to be moved by a downhole tool to cause the valve to transition from a first state to a second state. The index mechanism prevents the valve from transitioning from the first state to the second state until after a position of the sleeve follows a predefined pattern.
-
Citations
49 Claims
-
1. An assembly usable in a subterranean well, comprising:
-
a valve adapted to selectively isolate a region of the well;
a sleeve adapted to be moved by a downhole tool to cause the valve to transition from a first state to a second state; and
an index mechanism to prevent the valve from transitioning from the first state to the second state until after a position of the sleeve follows a predefined pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
-
-
16. A method comprising:
-
using a valve to isolate a region of a subterranean well;
moving a sleeve with a downhole tool to cause the valve to transition from a first state to a second state; and
preventing the valve from transitioning from the first state to the second state until after a position of the sleeve follows a predefined pattern.
-
-
30. An assembly comprising:
-
a valve adapted to transition between first and second states;
a first index mechanism functionally connected to the valve to prevent the valve from transitioning from the first state to the second state; and
a second responsive index mechanism functionally connected to the valve to prevent the valve from transitioning from the second state to the first state. - View Dependent Claims (31, 32, 33, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
-
-
34. A method comprising:
-
running a valve open into a wellbore;
shifting a tool a predetermined number of times to close the valve; and
increasing a pressure inside a tubing bore a predetermined number of times to open the valve.
-
-
35. A system usable with a subterranean well, comprising:
-
a port closure sleeve;
a valve adapted to selectively isolate a region of the well, the valve being located between the port closure sleeve and the surface of the well;
a second sleeve adapted to be moved by a downhole tool to cause the valve to transition from a first state to a second state; and
an index mechanism to prevent the valve from transitioning from the first state to the second state until after a position of the second sleeve follows a predefined pattern.
-
Specification