DEVICE FOR WELL DEPRESSION PERFORATING Russian patent published in 2003 - IPC

FIELD: devices for well perforation and treatment in course of their operation. SUBSTANCE: device has jet perforator and connected implosive chamber with membrane. Membrane is destroyed by pressure of well fluid which fills perforator after blasting of jet charges and formation of perforations. Implosive chamber is separated into sealed two or more sections by membranes with provision of their successive destruction. Destruction is started from nearest membrane and ended in distant membrane from perforator. Depression pulses are produced to stimulate producing formation by one volley of jet perforator. EFFECT: increased production rate of well due to formation stimulation by a large number of pressure pulses. 1 dwg