Apparatus and method for activating and deactivating a downhole tool
AssigneeSmith International, Inc.
InventorArturo Palacios
Life of this patent
Estimating the term…
Abstract
A control mechanism for a downhole tool including a mandrel having a throughbore, at least one activation port, and at least one bypass port, a first sleeve detachably mounted within the throughbore at a first position and moveable to a second position, the first sleeve having a first seat, and a second sleeve detachably mounted within the throughbore at a third position located axially above the first position and moveable to a fourth position, the second sleeve having a second seat. A method of hydraulically actuating and deactuating a downhole tool, the method including disposing the downhole tool and a control mechanism in a well.
Claims20
A control mechanism for a downhole tool comprising:
- a mandrel comprising a throughbore, at least one activation port, and at least one bypass port;
- a first sleeve detachably mounted to the mandrel and configured to slide axially within the throughbore from a first position to a second position, the first sleeve comprising a first seat;
- a second sleeve detachably mounted to the mandrel and configured to slide axially within the throughbore from a third position located axially above the first position to a fourth position, the second sleeve including a second seat;
- a piston chamber disposed proximate and radially outward an upper portion of the mandrel;
- and
- a piston disposed in the piston chamber, wherein the piston is moveable by a hydraulic force to actuate the downhole tool.
A method of hydraulically actuating and deactuating a downhole tool, the method comprising:
- disposing the downhole tool and a control mechanism in a well, wherein the control mechanism comprises a mandrel, a first sleeve detachably mounted to the mandrel and configured to slide axially within a throughbore of the mandrel and comprising a first seat, and a second sleeve detachably mounted to the mandrel and configured to slide axially within the throughbore and comprising a second seat, wherein the mandrel comprises at least one activation port initially blocked by the first sleeve, and wherein the mandrel further includes at least one bypass port;
- dropping a first drop object of a first size into the well;
- seating the first drop object in the first seat;
- applying a first predetermined hydraulic force against the first drop object to move the first sleeve axially downward within the mandrel to a first stop position, wherein moving the first sleeve to the first stop position opens the at least one activation port;
- flowing a fluid through the at least one activation port to actuate the downhole tool;
- dropping a second drop object of a second size into the well;
- seating the second drop object in the second seat;
- and
- applying a second predetermined hydraulic force against the second drop object to move the second sleeve axially downward within the mandrel to a second stop position, wherein moving the second sleeve to the second stop position blocks the at least one activation port.
A control mechanism for a downhole tool comprising:
- a mandrel comprising a throughbore, at least one activation port, and at least one bypass port;
- a first sleeve detachably mounted to the mandrel and configured to slide axially within the throughbore from a first position to a second position, the first sleeve comprising a first seat;
- a second sleeve detachably mounted to the mandrel and configured to slide axially within the throughbore from a third position located axially above the first position and moveable to a fourth position;
- and
- a third sleeve detachably mounted to the second sleeve and configured to slide axially within the second sleeve, the third sleeve including a second seat.
Dependencies are inferred from the claim text.