OIL WELL BOTTOM ZONE TREATMENT DEVICE Russian patent published in 2007 - IPC E21B43/263 E21B43/18 

FIELD: oil production industry, particularly to stimulate oil extraction by well bottom zone treatment.

SUBSTANCE: device comprises sealed body with cable head, heat-generation mixture charge and ignition initiation system. Local weakened areas are created in body wall. The weakened areas are made as blind holes or through windows closed with air-tight sealing diaphragms. The diaphragms are soldered or glued in the windows. The weakened areas are located in two locations along body length, namely near cable head and body bottom. Cable head and bottom are separated from heat-generation mixture charge with heat-isolation layers. The heat-generation mixture charge is made as a number of compacted blocks. The ignition initiation and heat-generation mixture charge blocks are made of high-energy thermit compositions. Ignition initiation system comprises electrode assembly having fixed spark gap and is located over or under heat-generation mixture charge.

EFFECT: increased oil recovery along with reduced device production costs.

3 cl, 1 ex, 1 dwg