DEVICE FOR COMBINED WELL PERFORATION AND FORMATION FRACTURING Russian patent published in 2002 - IPC

FIELD: oil-producing industry. SUBSTANCE: device has two modules located successively on carrying framework - perforating module with jet charges and gas- generating module in the form of tubular charges from solid fuel with metal central tubes pressed into internal channels. Modules are made for their simultaneous ignition, for instance, by detonating cord. Gas-generating module is made in the form of a set of tubular charges with elongation from 2 to 6. Both modules have common circuit initiation of jet charges and ignition of tubular charges in the form of detonating cord running through jet charges of perforating module and central tubes of charges of gas-generating module. Proposed device is used for increasing the efficiency of secondary tapping (perforation) of formations. EFFECT: increased efficiency of formation perforation. 3 cl, 4 dwg