METHOD OF BOREHOLE TRANSFER AND UNIT FOR TRANSFER OF LIQUID FROM UPPER WELL FORMATION TO LOWER ONE WITH FILTRATION Russian patent published in 2013 - IPC E21B43/14 

FIELD: oil and gas industry.

SUBSTANCE: in order to implement inventions, the unit is equipped with a removable device of flow distribution with liquid transfer channels and flushing channels of annular space above an upper packer against accumulation of mechanical impurities to provide the possibility of removing the plant from the well shaft. The above plant is equipped with the removable device of liquid cleaning from mechanical impurities with possibility of its being replaced without lifting the whole plant. The following instruments are installed: a flow metre, a humidity metre, a pressure sensor, a temperature sensor for measurement of liquid parameters, on the basis of which necessity for cleaning or replacement of the liquid cleaning device is evaluated. A pumping valve is installed for connection of in-tube and behind-tube spaces and minimisation of washaway of a casing string wall, a hydraulic anchor is installed to reduce vibration of the electric centrifugal pump plant - ECPP and to prevent negative influence of compressive loads on ECPP. A string disconnector with functions of telescopic connection and a disconnector is installed. Lower part of the plant is equipped with a funnel or a shank, or with a cutoff valve to cut off the liquid flow of lower formation.

EFFECT: improving efficiency of the method and operating reliability of the device at transfer of liquid from upper formation of the well to the lower one.

9 cl, 1 dwg