Selective hydraulic fracturing tool and method thereof
AssigneeBaker Hughes Incorporated
InventorsMatthew McCoy, Matthew Solfronk
Life of this patent
Estimating the term…
Abstract
A selective downhole tool including a tubular having a longitudinal bore enabling passage of fluids there through. Having a valve opening in a wall of the tubular. An expandable ball seat selectively movable between a first size sized to trap a ball to block flow through the tubular. A larger second size sized to release the ball through the tubular. A valve cover longitudinally movable within the tubular, the valve cover including a dissolvable insert. Also included is a method of operating a downhole tool.
Claims19
A selective downhole tool comprising:
- a tubular having a longitudinal bore enabling passage of fluids there through and having a valve opening in a wall of the tubular;
- an expandable ball seat selectively movable between a first size sized to trap a ball to block flow through the tubular and a larger second size sized to release the ball through the tubular;
- and
- a valve cover longitudinally movable within the tubular, the valve cover including a dissolvable insert;
- wherein the insert covers the valve opening in a first condition and is longitudinally movable within the tubular to expose the valve opening in a second condition, and the insert re-covers the valve opening in a third condition.
A selective downhole tool comprising:
- a tubular having a longitudinal bore enabling passage of fluids there through and having a valve opening in a wall of the tubular;
- an expandable ball seat selectively movable between a first size sized to trap a ball to block flow through the tubular and a larger second size sized to release the ball through the tubular;
- a valve cover longitudinally movable within the tubular, the valve cover including a dissolvable insert disposed in an aperture in the valve cover, and the aperture is selectively alignable with the valve opening;
- and
- an indexing apparatus engageable with the expandable ball seat, the expandable ball seat lockable in one of the first size and the second size by the indexing apparatus.
A method of operating a downhole tool, the method comprising:
- running the downhole tool in a bore hole, the tool including a tubular having a valve opening covered by a valve cover;
- moving the valve cover longitudinally to expose the valve opening;
- re-covering the valve opening with the valve cover subsequent an operation through the valve opening;
- and
- dissolving a portion of the valve cover to re-expose the valve opening.
Dependencies are inferred from the claim text.