METHOD OF WELL OPERATION AND DEVICE FOR IMPLEMENTATION THEREOF Russian patent published in 2019 - IPC E21B43/12 E21B37/08 

FIELD: soil or rock drilling; mining.

SUBSTANCE: group of inventions relates to mining, oil and gas industries, in particular to well operation, complicated by the presence of sand and asphalt-resin-paraffin deposits. According to the method, a composite string is lowered into the well. It is equipped in lower part with two independent channels - one for communication of productive formation with well head and production of well product at wellhead, and the other - for wellhead communication with productive formation and injection into the last working agent for treatment of productive formation. Each of the independent channels is equipped with a normally open valve to allow flow of the corresponding fluid in the corresponding direction. Method includes multiple alternation of cycles of production of formation at well head with treatment of productive formation. Duration of cycles, pressure of circulation of each of the fluids and flow rate of each of the fluids from time to time are changed. Productive formation response is taken into account.

EFFECT: group of inventions can be used to intensify inflow.

11 cl, 3 dwg