WELL OPERATION METHOD Russian patent published in 2012 - IPC E21B43/16 

FIELD: oil and gas industry.

SUBSTANCE: according to the method the tubing with rodless pump is lowered in the lower part and bypass group above the said pump. Formation fluid extraction is done via rodless pump with accumulation of associated gas in the annular space till obtaining excessive pressure that provides the possibility of fluid forcing from annular space to the tubing through bypass group. The extraction of formation fluid is done in forced operation conditions - at simultaneous operation of rodless pump and natural gas lift till provision of specified depression and cleaning of formation bottom-hole area. Then the well is switched to cyclic operation mode till reduction of formation fluid watering-out and watering-out stabilisation. Rodless pump is switched off and the well is switched to the main mode - the mode of gas lift operation. Gas lift operation is performed till the natural increase of formation fluid watering-out. The operations of formation fluid extraction via rodless pump are repeated.

EFFECT: increase of well operation efficiency through wider use of associated gas energy at simultaneous increase of useful product extraction factor with reduction of its watering-out.

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