Bidirectional downhole isolation valve
AssigneeWeatherford Technology Holdings, LLC
InventorJoe Noske
Life of this patent
Estimating the term…
Abstract
An isolation valve for use in a wellbore includes: a housing; a piston longitudinally movable relative to the housing; a flapper carried by the piston for operation between an open position and a closed position, the flapper operable to isolate an upper portion of a bore of the valve from a lower portion of the bore in the closed position; an opener connected to the housing for opening the flapper; and an abutment configured to receive the flapper in the closed position, thereby retaining the flapper in the closed position.
Claims25
An isolation valve for use in a wellbore, comprising:
- a housing;
- a piston longitudinally movable relative to the housing;
- a flapper carried by the piston for operation between an open position and a closed position, the flapper operable to isolate an upper portion of a bore of the valve from a lower portion of the bore in the closed position;
- an opener connected to the housing for opening the flapper;
- and
- an abutment independently movable from the piston and configured to receive the flapper in the closed position, thereby retaining the flapper in the closed position.
A method of isolating a string in a wellbore, comprising:
- deploying the string in the wellbore, the string having an isolation valve;
- moving a piston of the isolation valve towards an abutment of the isolation valve;
- moving the abutment independently of the piston;
- closing a flapper of the isolation valve to isolate a bore of the valve;
- and
- engaging the flapper with the abutment when the flapper is in the closed position.
An isolation assembly for use in a wellbore, comprising:
- an isolation valve, comprising:
- a housing;
- a piston longitudinally movable relative to the housing;
- a flapper for operation between an open position and a closed position, the flapper operable to isolate an upper portion of a bore of the valve from a lower portion of the bore in the closed position;
- a sleeve for opening the flapper;
- and
- a pressure relief device set at a design pressure of the flapper and operable to bypass the closed flapper;
- and
- a power sub for opening and/or closing the isolation valve and comprising:
- a tubular housing having a bore formed therethrough;
- a tubular mandrel disposed in the power sub housing, movable relative thereto, and having a profile formed through a wall thereof for receiving a driver of a shifting tool;
- and
- a piston operably coupled to the mandrel and operable to pump hydraulic fluid to the isolation valve piston.
Dependencies are inferred from the claim text.