FIELD: mining.
SUBSTANCE: group of inventions is related to drilling, i.e. to rotary drilling hydraulic drives installed in borehole. Assembly of hydraulic downhole motor comprises screw motor having near end and far end and comprising stator and rotor. Stator comprises metal case, first elastomer material arranged in metal case, and first rigid material, arranged radially and directed inward from and at least partially covering first elastomer material. Rotor contains metal core, second elastomer material, located around metal core, and second rigid material arranged around second elastomer material. Stator first rigid material contacts rotor second rigid material.
EFFECT: enabling limiting of rotor geometric center displacement trajectory.
12 cl, 21 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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| HYDRAULIC TOOLS WITH INSERTS AND METHODS OF THEIR CREATION | 2015 |
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| ROTOR PUMP ASSEMBLY AND ROTARY PUMP UNIT | 2016 |
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