HYDROCARBON PRODUCTION SYSTEM AND CORRESPONDING METHOD Russian patent published in 2020 - IPC E21B43/38 E21B43/40 

FIELD: chemistry.

SUBSTANCE: group of inventions relates to a system and a method for separating and removing water and solid medium from the produced fluid. Said system comprises: casing string-shank located inside casing string with limitation of annular zone of removal between casing-shank and casing string of well; a first submersible separator disposed within the well casing string and configured to receive the produced fluid from the production zone and form a stream with a high content of hydrocarbons and a stream of water containing the solid medium from said fluid; a production pump located inside the well casing string and connected to the first submersible separator and the unit located on the surface. Operating pump is designed so that to enable pumping of the flow with increased content of hydrocarbons along the channel from the first submersible separator to the above unit located on the surface. Said system also includes a second submersible separator located above the liner string inside the well casing connected to the first submersible separator and configured to receive a water stream comprising a solid medium from the first submersible separator, and separating solid from the water stream to form a separated stream of water; pipe connected to second submersible separator and configured to remove separated water flow from second submersible separator to water removal zone in wellbore; and a spring-loaded centralizer connected to the casing string and the well casing. Second submersible separator is designed to remove solid medium into annular zone of removal.

EFFECT: technical result consists in improvement of efficiency of separation and removal of water and solid medium from produced fluid.

23 cl, 2 dwg