Wells – Valves – closures or changeable restrictors – Fluid operated
Reexamination Certificate
2008-02-29
2010-06-08
Neuder, William P (Department: 3676)
Wells
Valves, closures or changeable restrictors
Fluid operated
C166S313000, C166S319000, C166S320000
Reexamination Certificate
active
07730953
ABSTRACT:
Systems and methods for selectively operating multiple hydraulic pressure controlled devices (PCDs) within a borehole using a common inflow and outflow line and a common cycling line. A control system is used wherein each of the PCDs is operationally associated with a separate sleeve controller. The sleeve controller for each PCD controls whether the individual PCD can be actuated by hydraulic pressure variations in the common inflow and outflow lines.
REFERENCES:
patent: 6352119 (2002-03-01), Patel
patent: 6948561 (2005-09-01), Myron
patent: 2002/0014338 (2002-02-01), Purkis et al.
patent: 2007/0163774 (2007-07-01), Hosatte et al.
patent: 2009/0065218 (2009-03-01), Loretz et al.
Baker Hughes Incorporated
Hunter Shawn
Neuder William P
Ro Yong-Suk
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