PUMPING-EJECTOR UNIT FOR OPERATING WELLS Russian patent published in 2018 - IPC E21B43/40 F04F5/54 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the field of oil and gas production and can be used in the development of innovative technologies for the extraction of oil and gas from watered wells in fields with difficult to recover and unconventional hydrocarbon reserves. Device contains a motor and a pump installed at the wellhead with a pump inlet and outlet. Ejector with a mixing chamber, a nozzle and an inlet gas channel is connected to the pump inlet channel. Gas-liquid separator is connected to the pump outlet. Output channel through the liquid is connected to the nozzle of the ejector, and through the gas through the first remotely controlled valve to the annular space of the two-row tubing string. In the lower part of the outer column of the mentioned pipes a check valve is placed. Gas inlet channel of the ejector is hydraulically connected with the annular channel formed between the outer column of the double row of tubing and the casing of the well. Discharge line of the well is connected to the above-mentioned annular channel, to the cavity of the inner tubing string and through a second remotely controlled valve to the annular space of the double row tubing string. It is possible to close the second remotely controlled valve and open the first remotely controlled valve when the gas pressure in the separator of the calculated pressure is reached.

EFFECT: intensification of well production by providing flexible control over a wide range of feed values, pressure and power of the pumping-ejector unit.

1 cl, 2 dwg