Wells – Screens
Reexamination Certificate
2007-06-26
2007-06-26
Neuder, William P (Department: 3672)
Wells
Screens
C166S320000
Reexamination Certificate
active
10488822
ABSTRACT:
An adjustable well screen assembly having a sand screen which is wrapped around a perforated base pipe and a perforated sleeve which is movably disposed concentrically inside the base pipe between a first, closed, and a second, open, position. In the first position of the sleeve the perforations of the sleeve and base pipe are unaligned and hydraulically isolated from each other and flow of fluids from the outer diameter of the screen into the interior of the sleeve is inhibited. In the second position the perforations of the sleeve and the base pipe are aligned and connected in fluid communication with each other and fluids are permitted to flow from the formation through the sand screen and the perforations of the sleeve and base pipe into the interior of the sleeve.
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Neuder William P
Shell Oil Company
Stiegel Rachael
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