STILL LIQUID EXTRACTION PLANT Russian patent published in 2011 - IPC F04F1/08 

FIELD: engines and pumps.

SUBSTANCE: downhole displacement pump has working chambers connected in turns to HP source made up of compressor and waste gas pipeline communicated with atmosphere. Each pump incorporates additionally central tube to discharge waster gas that makes an integral part of through pipeline to discharge used gas jointed via load-bearing flange fitted tightly on casing pipe to compressor. Load-bearing flange is provided with compressed gas feed branch pipe connected to compressor outlet. Extracted liquid built-up pipeline comprises intake section, pump working chambers, intermediate section and extracted liquid branch pipe jointed via load-bearing flange to main line and fitted on load-bearing flange tightly fitted on casing pipe flange.

EFFECT: lift of still liquid with increased content of mechanical impurities and associated gas in one-stage liquid lift, simple design and servicing.

1 cl, 7 dwg