| 摘要 |
The device for drawing out underground water from large depth, made up of a casing pipe of a wellbore, with a filter at its end and a head at the top, consisting in that a set of rotor pumps (4, 5) connected in series is seated in the casing pipe (1) of the wellbore, where the pumping pipe (6) of the first rotor pump (4) is suspended in the head (3), whereas in the pumping pipe (7) of the second rotor pipe (5), next to the first rotor pump (4), a stopper ring (8) and a rubber seal element (9) are seated, while the pumping pipeline (7) of the second rotor pump (5) is suspended on the pumping pipeline (6) of the first rotor pump (4), and besides, the lengths of pipelines (6, 7) for the rotor pumps (4, 5) correspond to their rise heights.<IMAGE>
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