Method for fracturing different zones from a single wellbore

Details Method for fracturing different zones from a single wellbore Method for fracturing different zones from a single wellbore

1997-09-25

1999-09-07

Tsay, Frank

Wells

Processes

Separate steps of fracturing or attacking formation

166308, 1663051, E21B 4326

Patent

active

059472006

ABSTRACT:
A method for fracturing a plurality of different subterranean production zones which are spaced along a wellbore wherein flow is established into a first or lower zone while a removable sleeve blocks flow into the other upper zones. The first zone is fractured and the sleeve is then notched, preforated, or repositioned to establish flow into a second zone while flow is now blocked into the lower, fractured zone. The second zone is fractured and this procedure is repeated until all of the desired zones have been fractured after the sleeve is retrieved to the surface.

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