FIELD: mining.
SUBSTANCE: plunger lift includes casing pipe, lift column, packer with packer liner and circulation valve mounted over the packer, plunger, upper and lower plunger stroke restrictor. The plunger also features additional column with mounting unit and intake unit placed in the lift column. The mounting unit of the additional column is set against internal lug of circulation valve case, while the inlet unit is positioned above upper edge of the lift column. Lower plunger stroke restrictor is placed above mounting unit of the additional column.
EFFECT: streamlined process of fluid lifting from wells with stepwise changing inner pipe and lift column equipment diametre.
4 cl, 8 dwg
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