TREATMENT METHOD OF BOTTOM-HOLE FORMATION ZONE, AND DOWNHOLE SYSTEM FOR ITS IMPLEMENTATION Russian patent published in 2013 - IPC E21B43/18 

FIELD: oil and gas industry.

SUBSTANCE: proposed method involves lowering to the well of a housing with a channel for interaction with intertube space closed with a support sleeve, insulation of intertube space from inner volume of a tubing string above the roof of a productive formation, pumping of process liquids to the productive formation, creation of depression and pumping of formation fluid at bottomhole pressure adjusted by means of a jet pump. According to the invention, below the housing there installed is a flow rate control; working liquid is pumped through the support sleeve and the flow rate control; intake capacity of the bottom-hole zone of the formation is recorded. Volume of working liquid for forcing-though to the formation of process liquids is determined as per the intake capacity value. Then, process liquids are pumped through the support sleeve and the flow rate control to the formation and forced through with the above determined volume of working liquid. At that, intake capacity of the bottom-hole zone of the formation is recorded, as per the value of which diameters of the nozzle and the combustion chamber of a jet pump are established to achieve optimum productivity at pumping-out of formation medium. Then, the jet pump is lowered to the well and liquid is pumped out of the formation.

EFFECT: increasing the efficiency of the method and improving operating reliability of the device, as well as enlarging process capabilities and operating conditions in different types of wells at their development, recovery and improvement of productivity.

23 cl, 2 dwg