Well perforating and treating apparatus

Claim 3

The invention as recited in claim 1 wherein saiD fluid conductor means includes a tube extending through said chamber, said tube having a lower end communicating with said wellbore and port means communicating with said chamber.

Claim 4

The invention as recited in claim 2 wherein said means for closing said conductor means communicating with said wellbore includes a seat formed in said lower end of said tube and a sealing member passable through said conduit and said tube and engageable with said seat in sealing relationship.

Claim 5

A well completion apparatus for fluid treating a subterranean formation surrounding a cased wellbore, said apparatus comprising: a lower body unit defining an enclosed chamber; an upper body unit defining an enclosed chamber, said units being assembled in vertically spaced relationship; a conduit in fluid communication with each of said chambers and adapted to conduct a treating fluid to each of said chambers; perforating means mounted in each of said chambers; and means for actuating said perforating means in said upper and lower units at selected times.

Claim 6

A well completion apparatus for fluid treating a subterranean formation surrounding a cased wellbore, said apparatus comprising: a lower body unit defining an enclosed chamber; an upper body unit defining an enclosed chamber, said units being assembled in vertically spaced relationship; a conduit in fluid communication with each of said chambers and adapted to conduct a treating fluid to each of said chambers; perforating means mounted in each of said chambers; and means for actuating said perforating means in said upper and lower units at selected times.

Claim 7

The invention as recited in claim 4 wherein each of said perforating means includes a perforator gun and firing mechanism operatively responsive to a predetermined fluid pressure in said conduit, the predetermined fluid pressure for actuating the lower unit firing mechanism being substantially lower than the predetermined fluid pressure for actuating the upper unit firing mechanism, and said means for actuating said perforating means includes means for increasing the pressure in said conduit to actuate said lower unit firing mechanism and then to increase the pressure in said conduit to actuate said upper unit firing mechanism.

Claim 8

The invention as recited in claim 5 wherein said lower unit perforating means includes means for arming said upper unit firing mechanism responsive to actuation of said first unit firing mechanism.

Claim 9

The invention as recited in claim 6 wherein said means for increasing the pressure in said conduit includes a sealing member passable through said conduit and lodgeable in said lower unit to interrupt fluid communication between said lower unit chamber and said conduit.

Claim 10

The invention as recited in claim 8 wherein said conduit includes a tube extending through said upper unit chamber and being connected in fluid communication with said lower unit chamber, said tube having port means communicating with said upper unit chamber, said sealing member being adapted to lodge in said tube to interrupt fluid communication between said upper unit chamber and said lower unit chamber.

Claim 11

The invention as recited in claim 8 wherein each unit perforator gun includes a plurality of vertically spaced jet perforators, the unit spacing and jet perforator spacing being such to provide a shot density of about one shot per foot of thickness of the formation to be treated.

Claim 12

A well completion apparatus for fluid treating a subterranean formation surrounding a cased wellbore, said apparatus comprising: a lower body unit defining an enclosed lower chamber; at least one upper body unit defining an enclosed upper chamber; means for assembling said lower body unit and said upper body unit in axial and spaced-apart alignment; a conduit adapted to support and locate the assembled units opposite said formation and providing conductor means for delivering treating fluid to each of said chambers; perforating means mounted in each of said chambers; means for first actuating said perforating means of said lower unit to form a fluid passage between said lower chamber and said formation, and then actuating said perforating means of said upper unit to form a fluid passage between said upper chamber and said formation.

Claim 13

A well completion apparatus for fluid treating a subterranean formation surrounding a cased wellbore, said apparatus comprising: a lower body unit defining an enclosed lower chamber; at least one upper body unit defining an enclosed upper chamber; means for assembling said lower body unit and said upper body unit in axial and spaced-apart alignment; a conduit adapted to support and locate the assembled units opposite said formation and providing conductor means for delivering treating fluid to each of said chambers; perforating means mounted in each of said chambers; means for first actuating said perforating means of said lower unit to form a fluid passage between said lower chamber and said formation, and then actuating said perforating means of said upper unit to form a fluid passage between said upper chamber and said formation.