WELL JET PERFORATOR Russian patent published in 1998 - IPC

FIELD: mining industry; production of liquid or fluid gaseous media from wells, in particular, in repeated opening of producing formations. SUBSTANCE: jet perforator has body in the form of a number of sections with upper and lower tight covers, jet charges, detonation channels, devices for detonation transmission and adapters. The latter connect sections and are made of two hinged links which located on upper and lower covers and provided with channels filled with explosives. Upper link is made in the form of shaped head which has damper, neck, stress concentrator and carrying member. Lower link is made in the form of spherical bed and has hole for its coincidence with head and recess is conjugated with hole for turning in it of one section relative to the other. In this case, neck is made destructive with device detonation. Channels of adapters are made in the form of longitudinal recesses coaxial with detonation channels and communicated with devices for transmitting detonation to their sections. EFFECT: provision of perforator passage through well of any configuration of its profile. 3 cl, 4 dwg