Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Reexamination Certificate
2007-04-17
2007-04-17
Thompson, Kenneth (Department: 3672)
Wells
Processes
Operating valve, closure, or changeable restrictor in a well
C166S053000, C166S319000, C166S386000
Reexamination Certificate
active
10296295
ABSTRACT:
A method of isolating a reservoir of production fluid in a formation comprises providing a pair of valves (14, 16) in a bore intersecting a production formation and in which the hydrostatic pressuer in the bore at the formation is normally lower than the formation pressure, and then ontrolling the valves (14, 16) from surface such that the valves (14, 16) will only move from a closed configuration to an open configuration on experiencing a predetermined differential pressure across the valves.
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Patterson & Sheridan L.L.P.
Thompson Kenneth
Weatherford / Lamb, Inc.
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