METHOD AND ARRANGEMENT FOR CONTROLLED INJECTION OF LIQUID THROUGH FORMATIONS Russian patent published in 2017 - IPC E21B43/14 E21B47/00 

FIELD: oil and gas industry.

SUBSTANCE: in well on tubing string, an arrangement of underground equipment is lowered including funnel/beveled end, a lower packer device, a deep-well research complex with geophysical cable, a well filter with a sludge trap, an injection valve without choke/blind insert, an upper packer device with a cable inlet. A device for sealing cable inlet and a head reinforcement with cable inlet are installed at the wellhead. An interface is installed on the surface, which makes it possible to read the parameters of the injected liquid in online mode and with the possibility for storing data and transferring data to a removable device and/or transmission of data over the GSM communication. Seating of packer devices and their pressing is carried out. The liquid is fed into pipe string cavity. The parameters of injected fluid injected into the lower formation are measured by means of deep research complex. By subtracting the flow rate of liquid pumped into the lower formation from the total flow rate of the injected fluid, the flow rate of the fluid injected into the upper formation is determined. The diameter of the union insert is selected according to formation injectivity and formation pressure. The union/blind insert of the injection valve is lowered, and controlled injection of liquid is carried out.

EFFECT: providing controlled injection of liquid into two formations by measuring the parameters of injected fluid with minimum number of pulling and running operations.

9 cl, 1 dwg