Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Reexamination Certificate
2011-04-19
2011-04-19
Gay, Jennifer H (Department: 3676)
Wells
Processes
Operating valve, closure, or changeable restrictor in a well
C166S318000, C166S369000
Reexamination Certificate
active
07926571
ABSTRACT:
A cemented open hole selective fracing system and method are shown. In the producing zone, an open hole is drilled therein and a production tubing is cemented in place. At preselected locations along the production tubing, the production tubing will have sliding valves located there along. The sliding valves may be selectively opened, and the cement around the sliding valve dissolved. Thereafter, the formation may be fraced immediately adjacent the opened sliding valve. By selectively opening different combinations of sliding valves, fracing can occur in stages with more fracing pressure and more fracing fluid being delivered deeper into the formation. Just as the sliding valves can be selectively opened, the sliding valves can also be selectively closed to protect the production of the well.
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Gay Jennifer H
Harcourt Brad
Hofman Raymond A.
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