| 摘要 |
FIELD: engines and pumps.SUBSTANCE: invention relates to pump engineering and can be used in borehole pumps designed to extract oil, water and other fluids from wells. Solid-state filler top end is secured to lifter while bottom end is secured to lower end of the rod reciprocating at filler up-and-down displacement.EFFECT: higher head and efficiency at notable content of gas in borehole fluid.3 dwg |
