FIELD: engines.
SUBSTANCE: group of inventions relates to hydraulic drives. Device for use in well contains stator, having inner surface with helical teeth; rotor, having outer surface with helical teeth and arranged in stator. At least one of inner surface with stator helical teeth and outer surface with rotor helical teeth includes sealing material at first contact section, at least, partially embedded into metal material, respectively, at least one of inner surface with stator helical teeth and outer surface with rotor helical teeth, and metal surface at second contact section, respectively, at least one of inner surface with stator helical teeth and outer surface with rotor helical teeth.
EFFECT: providing favorable volumetric efficiency and high output power.
11 cl, 8 dwg
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