METHOD OF TREATMENT OF BOTTOMHOLE ZONE OF PRODUCTIVE FORMATION AND BOTTOMHOLE Russian patent published in 2015 - IPC E21B43/25 

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to the oil producing industry, namely to methods of treatment of productive formation and a bottomhole zone using mud-pulse generators. The method comprises tripping of a pressure pulse generator and the subsequent pulse processing in the mode of 20-40 Hz with the maximum energy 5 kJ at a bottomhole pressure in intervals with the maximum oil saturation. The bottomhole zone of productive formation is cleaned. The pulse impact is performed by a cyclic depression pressure in a fluid-filled well. The depression pressure is regulated by a throttling flow of liquid using a throttling sleeve with replaceable bushings of various diameters. The bottomhole zone is cleaned using slotted and a feather filter, installed on tubing, and formations in a well are treated at least three times.

EFFECT: improvement of efficiency of pulse processing due to creation of wave impacts on depressions of the treated formation and distribution of the pressure pulse energy causing no negative factors.

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