Ball seat sub

Details Ball seat sub Ball seat sub

2009-10-01

2011-12-13

Thompson, Kenneth L (Department: 3672)

Wells

Valves, closures or changeable restrictors

Longitudinally movable operator

C166S373000, C166S319000

Reexamination Certificate

active

08074718

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.

REFERENCES:
patent: 4254836 (1981-03-01), Russell
patent: 5553672 (1996-09-01), Smith et al.
patent: 6866100 (2005-03-01), Gudmestad et al.
Combined Search and Examination Report issued in related British Application No. GB0917654.6; dated Nov. 30, 2009 (6 pages).

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