Multiple Unit Piercing Tool

Abstract

The present disclosure relates to a device and a method for piercing casing for oil wells, gas wells, geothermal wells and water wells. The device of this disclosure comprises a multiple chambered piercing assembly, which separates piercing units without threaded connections between each unit.

We claim: 
     
         1 . An assembly for piercing a well casing, comprising:
 an outer sleeve;   one or more tube segments sealably housed lengthwise in the outer sleeve, each of the one or more tube segments comprising one or more shape charges; and   puck dividers sealably attached to opposing ends of the one or more tube segments and configured to encapsulate the one or more shape charges;   wherein the puck dividers are configured as electrical feed through pressure barriers for each of the one or more tube segments.   
     
     
         2 . The assembly of  claim 1  wherein each of the one or more tube segments comprises an explosive initiation system. 
     
     
         3 . The assembly of  claim 2  wherein the explosive initiation system includes a detonator and an electrical switch. 
     
     
         4 . The assembly of  claim 1  further including end cap assemblies releasably attachable to opposing ends of the outer sleeve, each of the end cap assemblies comprising electrical feed through components. 
     
     
         5 . The assembly of  claim 1  wherein each of the puck dividers is configured to house an electrical feed through pressure barrier configured to allow electrical signal(s) to pass through the each of the puck dividers. 
     
     
         6 . The assembly of  claim 1  further comprising pressure barrier retainers configured to hold each electrical feed through pressure barrier inside a corresponding puck divider. 
     
     
         7 . The assembly of  claim 1  wherein the outer sleeve comprises one or more through ports aligned with the one or more shape charges. 
     
     
         8 . The assembly of  claim 3  wherein the explosive initiation system further includes a detonation cord. 
     
     
         9 . An assembly for piercing a well casing, comprising:
 an outer sleeve assembly;   one or more inner sleeves for holding one or more explosive assemblies; and   divider pucks releasably attached to opposing ends of the one or more inner sleeves;   wherein the outer sleeve assembly includes an outer sleeve comprising one or more through ports and an endcap assembly releasably attachable to each end of the outer sleeve;   wherein the one or more inner sleeves are configured to align the one or more explosive assemblies relative to one or more other explosive assemblies; and   wherein the divider pucks are configured as electrical feed through pressure barriers for the one or more one or more inner sleeves.   
     
     
         10 . The assembly of  claim 9  wherein each explosive assembly of the one or more explosive assemblies includes one or more shape charges and an explosive initiation system. 
     
     
         11 . The assembly of  claim 10  wherein the explosive initiation system includes a detonator and an electrical switch. 
     
     
         12 . The assembly of  claim 10  wherein the one or more shape charges may be oriented in a predetermined angle relative to other shape charges or other components in the system. 
     
     
         13 . The assembly of  claim 9  wherein the divider pucks are non-threadedly attached to opposing ends of the one or more inner sleeves. 
     
     
         14 . The assembly of  claim 9  wherein the outer sleeve assembly includes an outer sleeve comprising one or more through ports. 
     
     
         15 . A method, comprising:
 installing into a well bore a device configured to pierce a well casing of the well bore, the device comprising:
 an outer sleeve; 
 one or more tube segments sealably housed lengthwise in the outer sleeve, each of the one or more tube segments comprising one or more shape charges; and 
 puck dividers sealably attached to opposing ends of the one or more tube segments and configured to encapsulate the one or more shape charges; 
 wherein the puck dividers are configured as electrical feed through pressure barriers for each of the one or more tube segments.