Formation isolation valve
AssigneeSchlumberger Technology Corporation
InventorsDinesh R. Patel, David A. Hill, Jabus T. Davis, David T. Lamont, Charles D. Harding
Life of this patent
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Abstract
The present invention provides for high volume flow from a well. A retrievable formation isolation valve allows high volume flow through the remaining casing or tubing. Alternatively, a large bore valve configuration that is not retrieved, but remains as part of the casing, can be used. The present invention also includes methods to allow for high volume flow using retrievable isolation valves or large bore valves.
Claims56
A completion assembly for use in a well comprising:
- a conduit having an interior passageway;
- and
- a first valve sealingly and removeably mounted to the conduit in the interior passageway, the first valve being capable of opening and closing multiple times.
An isolation system for use in a well comprising:
- a casing having an interior passageway;
- and
- a first valve mounted to the casing and registering with the interior passageway when the first valve is open, the first valve being capable of opening and closing multiple times.
A completion assembly deployed within a multilateral well having a main bore and a lateral bore, the completion assembly comprising:
- a first valve sealingly mounted in the main bore;
- and
- a second valve sealingly mounted in the lateral bore;
- and in which
- at least one of the valves is removeable, and at least one of the valves can be opened and closed multiple times.
A retrievable valve for use in a well comprising:
- a housing having a central bore;
- an interior seal moveably mounted in the housing, the interior seal being moveable multiple times between an open position to allow flow through the central bore and a closed position to prevent flow through the central bore;
- and
- a release connected to the housing.
An apparatus for use in a well comprising:
- a first valve sealingly and removeably mounted in an interior passageway of a casing and registering with the interior passageway when the first valve is open, the first valve being capable of opening and closing multiple times.
A method for isolating a portion of a well comprising:
- attaching a first removable valve to a conduit in the well;
- actuating the first valve open or closed;
- performing operations in the well;
- and
- removing the first valve from the conduit.
A method for isolating a portion of a well comprising:
- inserting a casing having at least a first isolation valve in the well;
- actuating the first valve open or closed;
- performing operations in the well;
- and
- producing fluid from the well.
Dependencies are inferred from the claim text.