BOREHOLE HOLLOW-CARRIER JET-TYPE PERFORATOR Russian patent published in 2006 - IPC E21B43/117 

FIELD: oil and gas industry, particularly shaped-charge perforators.

SUBSTANCE: perforator comprises body made as a row of module sections. Each module includes hollow charges connected one to another by detonation circuit made as detonating cord, adapters to connect the sections one to another through detonation transmission device. The detonation transmission device includes serially connected cumulative detonation transmitting cartridge and receiving cartridge. The detonation transmitting cartridge and the receiving cartridge are arranged in all-metal plug provided with axial channel and in all-metal adapter correspondingly and connected to spring-loaded bush. The detonation transmitting cartridge is spaced a distance other than focal length. Covering member is arranged in receiving cartridge body. The covering member has cumulative groove located from detonating cord side. The hollow charges are arranged in thick-walled metal case. In accordance with the first embodiment the detonation device includes serially connected explosion-protected shell, heat-resistant detonating cord cut and cumulative detonation transmitting cartridge encased in separate case or explosion-protected pressure-resistance shell. In accordance with the second embodiment the detonation device comprises serially connected passive detonation intensifier, heat-resistant detonating cord cut and cumulative detonation transmitting cartridge arranged in individual case.

EFFECT: increased efficiency of perforation-explosive operations.

4 cl, 3 dwg