SUBMERSIBLE INSTALLATION OF AN ELECTRICALLY DRIVEN CENTRIFUGAL PUMP WITH A SAFETY DEVICE Russian patent published in 2022 - IPC F04D13/00 

FIELD: oil production.

SUBSTANCE: invention relates to oil production and can be used for cooling a submersible electric motor (SEM) of an electric submersible pump (ESP) installation both when the well is put into operation or periodically operated with insufficient inflow, and when the installation is located below the perforation interval. Designed to increase reliability and ensure uninterrupted operation in case of insufficient fluid inflow from the formation to cool the SEM. The submersible installation of an electric centrifugal pump with a protective device includes an electric centrifugal pump with an input module, a submersible electric motor with a thermomanometric system and hydraulic protection, a submersible cable, a protective device located outside the submersible electric motor with an annular gap, while the lower part of the protective device housing is made in the form truncated cone, the upper part of the body of the protective device, fixed on the body of the input module of the electric centrifugal pump, has a seal, and the inner cavity of the body of the protective device is equipped with helical stiffening ribs.

EFFECT: increasing the reliability of the ESP by providing cooling of the electric motor with a liquid flow equal to the productivity of the ESP in the current mode, regardless of the amount of liquid coming from the formation, as well as eliminating the need to install additional protective devices that prevent the ingress of mechanical impurities into the assembly.

1 cl, 3 dwg