High shot density perforating gun

Abstract

A perforating gun includes a charge tube disposed inside a carrier and a plurality of sets of shaped charges axially distributed along the charge tube and the initiation tube. Each shaped charge of the plurality of shaped charges is supported at an opening in the charge tube. The perforating gun also includes a plurality of detonator cords. Each detonator cord of the plurality of detonator cords connects to one shaped charge in each set of shaped charges.

What is claimed is: 
     
         1 . A perforating gun, comprising:
 a carrier;   a charge tube disposed inside the carrier;   a plurality of sets of shaped charges axially distributed along the charge tube and the initiation tube, each shaped charge of the plurality of shaped charges being supported at an opening in the charge tube; and   a plurality of detonator cords, each detonator cord of the plurality of detonator cords connecting to one shaped charge in each set of shaped charges.   
     
     
         2 . The perforating gun of  claim 1 , further comprising an initiation tube disposed inside the charge tube, wherein each shaped charge is further supported at an associated opening in the initiation tube. 
     
     
         3 . The perforating gun of  claim 2 , wherein the charge tube and the initiation tube are concentric tubular members. 
     
     
         4 . The perforating gun of  claim 3 , wherein a majority of a casing of each shaped charge is positioned between the initiation tube and the charge tube. 
     
     
         5 . The perforating gun of  claim 2 , wherein the plurality of detonator cords runs parallel through a bore of the initiation tube. 
     
     
         6 . The perforating gun of  claim 2 , wherein the plurality of detonator cords runs parallel to a longitudinal axis of the charge tube in a helical manner through the initiation tube. 
     
     
         7 . The perforating gun of  claim 1 , wherein each shaped charge in at least one set of shaped charges is detonated by a different detonator cord of the plurality of detonator cords. 
     
     
         8 . The perforating gun of  claim 1 , wherein adjacent sets of shaped charges have an angular phase shift relative to one another. 
     
     
         9 . The perforating gun of  claim 1 , wherein the shaped charges of each set are circumferentially distributed along a plane transverse to a longitudinal axis of the carrier. 
     
     
         10 . A perforating gun, comprising:
 a carrier;   a charge tube disposed inside the carrier;   a plurality of sets of shaped charges axially distributed along the charge tube and the initiation tube, each shaped charge of the plurality of shaped charges being supported at an opening in the charge tube, wherein the shaped charges of each set are circumferentially distributed along a plane transverse to a longitudinal axis of the carrier;   a plurality of detonator cords, each detonator cord of the plurality of detonator cords connecting to one shaped charge in each set of shaped charges; and   an initiation tube disposed inside the charge tube, wherein each shaped charge is further supported at an associated opening in the initiation tube.   
     
     
         11 . The perforating gun of  claim 10 , wherein adjacent sets of shaped charges have an angular phase shift relative to one another, and wherein the shaped charges of each set are circumferentially distributed along a plane transverse to a longitudinal axis of the carrier. 
     
     
         12 . The perforating gun of  claim 10 , wherein the charge tube and the initiation tube are concentric tubular members, wherein a majority of a casing of each shaped charge is positioned between the initiation tube and the charge tube, and wherein the plurality of detonator cords runs parallel through a bore of the initiation tube. 
     
     
         13 . A method of using a perforating gun, comprising:
 attaching the perforating gun to a conveyance device, the perforating gun including:   a carrier,   a charge tube disposed inside the carrier,   a plurality of sets of shaped charges axially distributed along the charge tube and the initiation tube, each shaped charge of the plurality of shaped charges being supported at an opening in the charge tube, and   a plurality of detonator cords, each detonator cord of the plurality of detonator cords connecting to one shaped charge in each set of shaped charges;   conveying the perforating gun into a wellbore using the carrier;   positioning the perforating gun at a desired depth in the wellbore; and   transmitting a signal from a surface location to fire the perforating gun.