Perforating gun assembly for use in multi-stage stimulation operations

An apparatus for use in perforating multiple intervals of at least one subterranean formation intersected by a cased wellbore and in treating said multiple intervals using ball sealers as a diversion agent, said apparatus comprising:

• (a) a perforating assembly comprising a plurality of select-fire perforating devices interconnected by connector subs, each of said perforating devices having multiple perforating charges;
• (b) at least one depth locator connected to said perforating assembly;
• and
• (c) at least one decentralizer attached to at least one of said perforating devices, said decentralizer adapted to eccentrically position said perforating assembly within said cased wellbore so as to create sufficient ball sealer clearance between said perforating assembly and the inner wall of said cased wellbore to permit passage of at least one ball sealer.

An apparatus for use in perforating multiple intervals of at least one subterranean formation intersected by a cased wellbore and in treating said multiple intervals using ball sealers as a diversion agent, said apparatus comprising:

• (a) a perforating assembly comprising a plurality of select-fire perforating devices interconnected by connector subs, each of said perforating devices having multiple perforating charges;
• (b) at least one depth locator connected to said perforating assembly;
• (c) at least one decentralizer attached to at least one of said perforating devices, said decentralizer adapted to eccentrically position said perforating assembly within said cased wellbore so as to create sufficient ball sealer clearance between said perforating assembly and the inner wall of said cased wellbore to permit passage of at least one ball sealer;
• and
• (d) at least one stand-off positioned on said perforating assembly so as to create an imposed shot clearance between said perforating assembly and the inner wall of said cased wellbore when said perforating assembly is eccentrically positioned.

An apparatus for use in perforating multiple intervals of at least one subterranean formation intersected by a cased wellbore and in treating said multiple intervals using a diversion agent, said apparatus comprising:

• (a) a perforating assembly comprising a plurality of select-fire perforating devices interconnected by connector subs, each of said perforating devices having multiple perforating charges;
• (b) at least one decentralizer attached to at least one of said perforating devices, said decentralizer adapted to eccentrically position said perforating assembly within said cased wellbore so as to create sufficient diversion agent clearance between said perforating assembly and the inner wall of said cased wellbore to permit passage of said diversion agent past said perforating assembly and treat at least one of said multiple intervals following perforation of said interval;
• and
• (c) at least one depth locator attached to said perforating assembly.