PUMPING UNIT FOR CARBONATED OIL FLUIDS Russian patent published in 2019 - IPC E21B43/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry and can be used for pumping of carbonated oil fluids in any mechanized method of well operation. Pump unit includes well pump, tubing, discharge and pressure headers and gas line with check valves. On the discharge manifold at the well mouth there is an auxiliary pump with a frequency-controlled drive and a pressure sensor. Said transducer is connected by communication channel with frequency-controlled drive frequency converter control system. Connection of annular space with gas line with discharge header is made between well head and pressure sensor. At that, the auxiliary pump is programmed to increase or decrease the capacity according to the pressure sensor data with provision of minimum pressure at its reception close to atmospheric pressure.

EFFECT: reduction of negative effect of annular associated gas on capacity of mechanized oil production facilities, as well as improvement of reliability of downhole equipment by pressure reduction of well pump.

1 cl, 1 dwg