Downhole sub with hydraulically actuable sleeve valve
AssigneePackers Plus Energy Services Inc.
InventorsDaniel Jon Themig, Kevin O. Trahan, Christopher Denis Desranleau, Frank Delucia
Life of this patent
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Abstract
A method for opening a port through the wall of a ported sub including: providing a sub with a port through its tubular side wall; providing a hydraulically actuable valve to cover the port, the valve being actuable to move away from a position covering the port to thereby open the port; increasing pressure within the sub to create a pressure differential across the valve to move the valve toward the low pressure side, while the port remains closed by the valve; thereafter, reducing pressure within the sub to reduce the pressure differential; and driving the valve to move it away from a position covering the port.
Claims21
A hydraulically actuable sleeve valve comprising:
- a tubular segment including a wall defining therein an inner bore;
- a port through the wall of the tubular segment;
- a sleeve supported by the tubular segment and installed to be axially moveable relative to the tubular segment from a first position covering the port to a second position and to a third position away from a covering position over the port, the sleeve including a first piston face open to tubing pressure and a second piston face open to annular pressure, such that a pressure differential can be set up between the first piston face and the second piston face to drive the sleeve toward a low pressure side from the first position into the second position with the sleeve continuing to cover the port;
- and
- a driver to move the sleeve from the second position into the third position, the driver being unable to move the sleeve until the pressure differential is substantially dissipated.
A method for opening a port through the wall of a ported sub, the method comprising:
- providing a sub with a port through its tubular side wall;
- providing a hydraulically actuable valve to cover the port, the valve being actuable to move away from a position covering the port to thereby open the port;
- increasing pressure within the sub to create a pressure differential across the valve to move the valve toward the low pressure side, while the port remains closed by the valve;
- thereafter, reducing pressure within the sub to reduce the pressure differential;
- and
- driving the valve to move it away from a position covering the port.
A wellbore tubing string assembly, comprising:
- a tubing string;
- and
- a first plurality of sleeve valves carried along the tubing string, each of the first plurality of sleeve valves capable of holding pressure when a tubing pressure within the tubing string is greater than an annular pressure about the tubing string and the first plurality of sleeve valves being driven to open at substantially the same time as the tubing pressure is substantially equalized with the annular pressure.
-44. (canceled)
Dependencies are inferred from the claim text.