METHOD OF PERIODIC WELL OPERATION WITH THE HELP OF SUBMERSIBLE UNIT OF ELECTRIC CENTRIFUGAL PUMP Russian patent published in 2019 - IPC E21B43/00 

FIELD: oil industry.

SUBSTANCE: invention relates to oil industry and can be used in operation of wells with the help of submersible units of electric centrifugal pumps (UECP) operated in intermittent mode and complicated by asphalt-resin-paraffin deposits, for removal of which special mechanical scrapers are used. Method involves repetition of cycles of liquid pumping from the well, alternating with fluid accumulation in the well at the electric centrifugal pump submerged device switched off, regulation of pump-and-accumulation durations with the help of the control station. During fluid pumping, the well is cleaned by mechanical scrapers. Pump and accumulation durations are adjusted taking into account well cleaning. Synchronization of operating modes of control station and scraper drive is performed by means of synchronization module intended for automatic start of scraper drive in preset time interval after pumping mode start in control station. Operation mode is selected so that pumping time is greater than total time of scraping and calculated duration of delay between start-up of electric submersible pump submerged motor and scraper drive.

EFFECT: elimination of pump clogging and possibility to achieve design yield due to coordinated and synchronous operation of scraper and UECP.

5 cl, 1 dwg