FIELD: mining.
SUBSTANCE: invention relates to the field of mining, namely to means for construction of wells. A volumetric downhole motor contains a stator and a rotor located inside the rotating stator. Arc-shaped grooves with a bottom are made on the stator. Arc-shaped grooves with a bottom are limited with semicylindrical blades. Arc-shaped grooves go to openings made with the possibility of communication with a space between the rotor and the stator. Polar ledges are longitudinally made on an outer surface of the stator. Polar ledges form cavities expanding towards stator rotation. Ledges are equipped with replaceable inserts in the form of semi-bushings closing cavities and contacting in sliding to walls of wells.
EFFECT: increase in the reliability of operation of a volumetric downhole motor is provided.
1 cl, 2 dwg
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|---|---|---|---|
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| WELL ENGINE | 2001 |
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RU2224077C2 |
