DEVICE FOR TREATMENT OF BOTTOM-HOLE ZONE Russian patent published in 2017 - IPC E21B43/117 E21B43/263 

FIELD: mining.

SUBSTANCE: invention relates to mining industry and intended for productive formations opening in oil and gas wells during drilling and blasting operations. Device for bottom-hole zone treatment contains hollow-carrier perforator or capsule-type perforator in casing string with cumulative and gas-generating charge of solid fuel, combined with acid reagent. Cumulative charge recess lining is fluoroplastic or other fluorine- and/or chlorine-containing polymer material. Cumulative and gas-generating charges initiation from corresponding to each charge initiation device is carried out simultaneously. Solid fuel, combined with acid reagent, is ammonium perchlorate and epoxide compound mixture in following ratio of components, wt%: ammonium perchlorate – 70–90, epoxide compound – 30–10.

EFFECT: enabling increasing efficiency of design well flow rate achievement, especially under carbonate reservoir conditions, elimination of well and its perforation channels blockage with fragments of cumulative charges sealed housing, elimination of casing pipes damage and deformation due to absence of metallic cumulative jet effect, improving acid reagent action efficiency.

3 cl, 4 dwg