INSTALLATION FOR LIFTING FORMATION FLUID ALONG PRODUCTION STRING Russian patent published in 2025 - IPC E21B43/00 F04D13/10 

FIELD: mining.

SUBSTANCE: invention relates to oil and gas production, in particular to production of hydrocarbons from wells of small diameter by means of submersible units of electric centrifugal pumps lowered into the well on a load-carrying cable. Installation for lifting formation fluid along the production string contains a submersible electric motor with hydraulic protection and a power supply cable, a discharge module, an electrically driven centrifugal pump with a check valve, a drain assembly, a sealing assembly, control station with frequency converter, flangeless quick-release connection of housings. Motor with hydraulic protection and discharge module are arranged in a single housing to form a drive unit, and the electrically driven centrifugal pump, the check valve, the drain assembly, the sealing assembly are made in the form of a hydraulic unit with arrangement in a common housing. Load-carrying cable line is connected to the drive unit. Drive unit is equipped with a single shaft bearing support for the electric motor, hydraulic protection and discharge module, which is located between the electric motor and the hydraulic protection.

EFFECT: simplification and reduction of installation duration, possibility of installation in a well with a large zenith angle or horizontal end of the well shaft, reduction of length and improvement of reliability of the installation.

2 cl, 3 dwg