FIELD: machine engineering.
SUBSTANCE: invention relates to the petroleum and gas industry, can be used as an autonomous turbine for power generation or for the purpose of equalising the temperature irregularities. The screw turbine comprises a shaft 1 and a working screw surface 2 attached thereto, wherein the flow of the medium moves along said surface, as well as a wall 4 made on the outer edge of the screw surface, restricting the flow movement. The screw surface comprises at least one solid profile stage 3 located thereon transversely to the flow movement.
EFFECT: invention is aimed at increasing the reliability of the turbine and expanding the functional capabilities for downhole conditions.
11 cl, 7 dwg
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