METHOD FOR SIMULTANEOUS SEPARATE INJECTION OF WORKING FLUID AND INSTALLATION FOR IMPLEMENTATION THEREOF Russian patent published in 2020 - IPC E21B43/14 E21B43/12 E21B43/20 

FIELD: mining.

SUBSTANCE: group of inventions relates to maintaining formation pressure at multi-layer deposits and can be used in simultaneous separate injection (SSI) of working agent. During the first lowering-lifting operation (LLO), the underground equipment layout is equipped with a funnel, the well bottom is flushed with the help of flexible tubing string. When performing the second LLO, the wellhead is equipped with a standard flow meter, the geophysical cable is equipped with a fibre-optic cable and a geophysical cable disconnection device. Geophysical cable is connected with upper by bypass controlled electric valve with choke restriction assembly (BCEV-CRA) by means of the first branch, and also with lower BCEV-CRA by means of the second branch. Temperature is measured throughout the borehole. At the control station (CS) values of the flow rates from the bottom BCEV-CRA on the bottomhole flow rate of the working agent pumped to the lower stratum and from the upper BCEV-CRA on the bottomhole flow of the working agent pumped to the upper stratum are obtained. Total depth consumption of working agent pumped into upper and lower formations is determined. Method includes comparing in manual or automatic mode values of total depth and reference flow rates of working agent, if they differ, CS signals incorrect operation, depth calibration of equipment is performed.

EFFECT: technical result is reducing the time required for performing the LLO by equipping the installation with a geophysical cable disconnection device which enables to inject the working agent into the lower formation in case of failure of the upper BCEV-CRA.

2 cl, 2 dwg