Patent ID: 7108060

Claim:
An apparatus for fracturing different levels of a completion interval of a subterranean formation which is traversed by a wellbore, said apparatus comprising: a workstring comprising: a tubing string; a cross-over connected to the lower end of said tubing string; and a fracturing string connected to said cross-over and configured to form a completion interval annulus with said wellbore; said fracturing string comprising: a length of blank, base pipe having a plurality of perforated sections spaced along its length, each of said perforated sections having a plurality of openings through said base pipe which extend along a portion of said length of said base pipe; wherein blockages are formed in said completion interval annulus adjacent to at least some of said perforated sections to isolate said levels of said completion interval annulus between said perforated sections; and at least one alternate flow path extending along said length of said base pipe; said at least one alternate flow path having an inlet and at least one outlet therein.