Ball seat sub
AssigneeSmith International, Inc.
InventorWilliam M. Roberts
Life of this patent
Estimating the term…
Abstract
A downhole tool for providing a pressure differential between sub-assemblies, the downhole tool including an elongated body, a tubular assembly disposed within the elongated body, the tubular assembly including a central flowbore with an inner diameter and a central longitudinal axis, a camming device, an actuator member located below the tubular assembly, having a dual-bore configuration, the actuator member including a first bore, a second bore, and a concave seating surface formed within the second bore for receiving a obstructing device, wherein the first bore and the second bore are oriented 90 degrees to one another so that fluid may flow through the actuator while it is in either a first or a second position, and a stationary sleeve concentrically disposed between the actuator member and the elongated body is disclosed.
Claims20
A downhole tool for providing a pressure differential between sub-assemblies comprising:
- an elongated body;
- a tubular assembly disposed within the elongated body, the tubular assembly comprising:
- a central flowbore with an inner diameter, and
- a central longitudinal axis;
- a camming device;
- an actuator member located below the tubular assembly, having a dual-bore configuration, the actuator member comprising:
- a first bore;
- a second bore;
- and
- a concave seating surface formed within the first bore for receiving an obstructing device,
- wherein the first bore and the second bore are oriented 90 degrees to one another so that fluid may flow through the actuator while it is in either a first or a second position;
- and
- a stationary sleeve concentrically disposed between the actuator member and the elongated body.
A method of operating a downhole tool for providing a pressure differential between sub-assemblies, the method comprising:
- running a setting tool downhole tool to a desired location in a wellbore, the downhole tool comprising:
- an elongated body;
- a tubular assembly disposed within the elongated body, the tubular assembly further comprising:
- a central flowbore with an inner diameter, and
- a central longitudinal axis;
- a camming device;
- an actuator member having a dual-bore configuration, the actuator member further comprising:
- a first bore;
- a second bore;
- a concave seating surface formed within the first bore for receiving an obstructing device;
- and
- a stationary sleeve disposed between the actuator member and the elongated body, wherein the actuator member is aligned axially in a first position and located below the tubular assembly;
- circulating a fluid through the central flowbore;
- disposing the obstructing device into the fluid,
- wherein the fluid guides the obstructing device into the seating surface;
- and
- providing a pressure differential between an upper sub and a lower sub to activate the downhole tool.
Dependencies are inferred from the claim text.