METHOD OF WELL OPERATION (VERSIONS) AND DEVICES FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC E21B43/12 E21B34/06 

FIELD: oil and gas industry.

SUBSTANCE: method of well operation by installing electric centrifugal pump includes putting the well into operation, producing well product, shutting down, restarting the plant that includes air-tight screwed tubing strings, a motor, an electric centrifugal pump that includes a body, a shaft, stages, a base and fishneck, a return valve installed air-tightly above the pump characterized in that in the lower part of the pump there is a pump shut-off device in the form of at least one valve comprising stationary body and dynamic bushing mounted on a shaft which is hermetically sealed, when the pump is shut-down, and during operation it opens and connects the lower part of the pump to the annular space. The shut-off valve module of the electric centrifugal pump for operating the wells includes a body, the end parts, a shaft, at least one valve that hydraulically connects the pump inlet and the annular space, and which consists of stationary mounted valve body and dynamic bushing mounted on the shaft. The electric centrifugal pump for the operation of wells, which body contains at least one valve in the lower part hydraulically connecting the pump inlet and the annular space, and which consists of valve body stationary mounted in the pump body and dynamic bushing mounted on the shaft.

EFFECT: increased effectiveness of proposed group of inventions.

5 cl, 6 dwg