METHOD OF TREATING BOTTOM-HOLE ZONE OF WELL Russian patent published in 1997 - IPC

FIELD: oil production industry. SUBSTANCE: this can be used for cleaning bottom-hole zone of well from paraffin, asphalt-resin, and sludge deposits. According to method, lowered into well is subsurface technological equipment with charge of slow-burning source of thermogas or thermogas-chemical effect. Charge is burnt out. Plane of start of burning source is located below lower perforation holes of treated interval by 5-14 % of its length. Technological delay is effected for heat accumulation. Then equipment with treating source is displaced along interval being treated. Technological delay is effected for replacement of gaseous burning products in treated interval with well liquid. Then depression takes place with removing part of well liquid together with sedimentation components penetrated in liquid from bottom-hole zone. EFFECT: high efficiency. 1 cl