METHOD FOR OPERATING A WELL EQUIPPED WITH A DOWNHOLE ROD PUMPING UNIT IN CONDITIONS COMPLICATED BY A DECREASE IN THE DYNAMIC LEVEL Russian patent published in 2023 - IPC E21B43/00 E21B47/07 F04B47/02 F04B49/06 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry, and in particular to methods for operating a downhole rod pumping unit. To implement the method for operating a well equipped with a downhole rod pumping unit (DRPU), under conditions complicated by a decrease in the dynamic level, a tubing string is lowered into the well, a rod pump is installed on the sucker rod string and the wellhead, a temperature sensor is installed. The sucker rod pump drive with the frequency-controlled electric converter control unit is put into operation. The critical value of the temperature of the wellhead rod is preliminarily determined, a temperature sensor is installed on the wellhead rod 1-2 cm above the wellhead stuffing box at the lower position of the rod pump drive balancer head. The temperature sensor is connected to the controller of the frequency-controlled electric converter, the controller is programmed to issue commands to stop the rod pump drive, to start the rod pump drive, to change the swing frequency of the rod pump drive balancer. When the critical temperature of the wellhead rod heating, which characterizes the stall of the pump supply, is first reached, the controller is programmed to stop the rod pump drive and start the drive in 2-4 hours, depending on the production capabilities of the well. When the temperature of the wellhead rod reaches a critical value for the second time within 30-60 minutes from the start of operation, the controller is programmed to stop the rod pump drive to perform repair work. When the temperature of the wellhead rod reaches a critical value after a time interval of more than 30-60 minutes during the day, the controller is programmed to reduce the swing frequency of the rod pump drive balancer using a frequency-controlled electric converter.

EFFECT: improving the accuracy of well performance assessment, the efficiency of drive operation regulation, which excludes complications and emergencies with a decrease in the productivity of the DRPU due to a decrease in the dynamic level.

1 cl, 1 dwg