APPARATUS FOR CASING STRINGS PERFORATION BY CUMULATIVE CHARGES

摘要

FIELD: liquid production from wells, oil and gas wells perforation in particular. SUBSTANCE: apparatus provides increase of perforated canals sizes with simultaneous decrease of electrical power consumption. Apparatus has main cumulative charges in individual casings and means of their explosion. Besides, apparatus has additional cumulative charges . Main cumulative charges with means of their explosion are located on peaks of wedges. They are capable to make preliminary transversal notches on string. Additional cumulative charges are located in bases of wedges. The are mounted so as to be capable to explode from main cumulative charges and final formation in string of perforated canals in zones of preliminary transversal notches. EFFECT: apparatus provides increase of perforated canals sizes with simultaneous decrease of electrical power consumption. 6 dwg