METHOD OF CONTROLLED PUMPING DOWN TO FORMATIONS AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2019 - IPC E21B43/14 E21B34/10 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to the oil industry, in particular, to equipment for operating injection wells that have opened two formations. In the well on the column tubing sink the layout of underground equipment, including the lower packer, disconnector, injection distribution device (IDD), upper packer, disconnector, make the fit of the packers and their crimping. Carry out the injection of fluid from the mouth into the cavity of the tubing string, the determination of the total flow rate of the fluid injected into the upper and lower layers, lifting the removed part of the IDD to the surface, changing its characteristics, re-installing the removable part of the IDD in the tubing before it is seated in the case part of the IDD, pumping fluids through it into the corresponding formations, after completion of the work, the underground equipment is lifted. Soluble ball is discharged, the fluid flow for the lower reservoir is measured, the upper reservoir fluid flow is determined, the actual fluid flow for the upper and lower reservoir is compared with the specified values, when they differ, the recoverable part of the IDD is lifted to the surface, then the upper and lower fittings are installed into the seats of the removable part of IDD, the extracted part of IDD is lowered into the tubing before it is mounted in the IDD and pumped. Above the upper bushing of the removable part of IDD there is an additional bushing, equipped with radial holes and a mounting seat for a discharged soluble ball.

EFFECT: technical result consists in increasing the efficiency of simultaneous-separate injection.

2 cl, 5 dwg