DEVICE FOR TWO-STROKE METHOD OF LIFTING PRODUCT FROM BOTTOMHOLE OF OIL WELL Russian patent published in 2019 - IPC F04B47/00 

FIELD: oil industry.

SUBSTANCE: invention relates to oil industry and can be used in development and operation of oil deposits for mechanized lifting of products from wells. Device for two-stroke method of lifting product from bottomhole of oil well includes production well with casing string and tubing, rod bottomhole pump, comprising housing, suspended on tubing string with plunger installed in housing, hollow rod connected to rod string, outlet holes, suction and delivery valve-balls, and also elastic spring installed above plunger. Over the plunger there are units for additional suction and delivery valve-balls, with possibility of injecting well products both at plunger lifting, and at its lowering. Units are made in the form of flanges with installed in them ball valves. Elastic steel spring is installed above the plunger and is located between fixed discs with the possibility of lifting the well product production along the tubing string and its drainage into the reservoir.

EFFECT: increased efficiency and efficiency by creation of design, which allows injection, lifting and draining of well products into reservoir, both at lifting of rod string, and at its lowering.

1 cl, 1 dwg