Wells – Processes – Graveling or filter forming
Reexamination Certificate
2006-12-26
2006-12-26
Tsay, Frank S. (Department: 3672)
Wells
Processes
Graveling or filter forming
C166S373000, C166S387000, C166S227000
Reexamination Certificate
active
07152678
ABSTRACT:
An isolation system for producing oil and gas from one or more formation zones and methods of use are provided comprising one or more pressure activated valve and one or more tool shiftable valve. The tool shiftable valve may be actuated before or after actuation of the pressure activated valve.
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Ross Dick
Traweek Marvin Bryce
Turner DeWayne
BJ Services Company U.S.A.
Tsay Frank S.
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