Wells – Processes – Separate steps of fracturing or attacking formation
Reexamination Certificate
2007-09-11
2007-09-11
Neuder, William (Department: 3672)
Wells
Processes
Separate steps of fracturing or attacking formation
C166S308100, C166S373000
Reexamination Certificate
active
11079950
ABSTRACT:
A cemented open hole selective fracing system is 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 by a shifting tool, 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 with a switching tool, the sliding valves can also be selectively closed to protect the production of the well.
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Coy Nicole
Gunn & Lee , P.C.
Neuder William
Peak Completion Technologies, Inc.
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