| 摘要 |
FIELD: oil industry. ^ SUBSTANCE: device has cylindrical pump body connected to tubing pipe with inlet aperture in upper portion and plunger with aperture, mounted in the body, with possible reciprocal movement, having cylindrical side surface and diameter equal to inner diameter of pump body. According to invention in body of pump at least four inlet apertures are made, positioned in couples at different levels and with even step between each other and symmetrically to body axis. One couple of inlet apertures is placed in upper portion of body, other one - in lower portion. Upper portion of body is provided with cover with cylindrical cover positioned above bottom of plunger. Plunger is held with inner surface of pump body with forming of ring-shaped plane, in which side surface of plunger is positioned. In lower portion of cylindrical side surface of plunger at least two inlet apertures are made, positioned in same plane with inlet apertures of pump body. On inner surface of pump body at least two guiding slits are made. On cylindrical generatrix of side surface of plunger plates are mounted with their possible movement in guiding slits for combination of inlet apertures of pump body and side surface of plunger. Plunger bottom is connected to bar. In lid of pump body aperture is made along body axis with diameter, equal to bar diameter, for providing for reciprocal movement of plunger, and on it two inlet apertures are made, positioned symmetrically relatively to body axis and provided with check valves. ^ EFFECT: higher efficiency, broader functional capabilities. ^ 3 cl, 3 dwg |
