| 摘要 |
FIELD: oil industry. ^ SUBSTANCE: device has cylindrical body of pump with inlet aperture in upper portion, closed in lower edge portion and in upper portion connected to tubing pipe. Plunger with cylindrical side surface is mounted with possible reciprocal movement in the body, plunger having diameter, equal to inner diameter of pump body with check aperture in upper portion and upper aperture with check valve in bottom portion. According to invention in pump body 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 of couples of inlet apertures is positioned in upper portion of pump body, and another body - in lower portion. To bottom portion of plunger cylinder-shaped skirt is connected with diameter, equal to inner diameter of pump body. On side surface of skirt 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 direction slits are made, and on cylindrical generatrix of side surface of plunger skirt plates are mounted with their possible displacement in guiding slits for combining inlet apertures of pump body and of side surface of plunger skirt. ^ EFFECT: higher efficiency. ^ 3 cl, 3 dwg |
