Gun below packer completion tool string

摘要: A perforating gun is suspended downhole in a cased borehole, underlying relationship relative to packer device, and adjacent hydrocarbon-bearing formation be completed. connecting tubing interconnects the with includes rupture barrier therebetween which prevents debris from accumulating within firing head. An upper string removably connected device forms passageway extends surface of earth, down through packer, The seal means an extension tube sealingly engages penetrates provide can fired earth. This combination elements malfunction when tool left for appreciable length time.