| 摘要 |
<p>A device, preferably utilized for pumping oil or other fluid from a drill hole in the ground, said device including a pump (4) lowered into the hole and coupled to a drive motor situated under it. The pump comprises a hydraulic screw pump including a housing (9) in which there is mounted a screw array in the form of a drive screw (13) provided with a shaft (20) coupled to the drive motor, and at least one running screw (14) meshing with the drive screw. The rotational direction of the drive motor is such that the screw array pumps the liquid from an inlet (11), made radially in the housing and in communication with the liquid in the drill hole, to an outlet (at 15) arranged at the end of the screw array remote from said shaft. </p> |
