Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with...
Patent
1991-01-25
1992-03-24
Look, Edward K.
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
415901, 415903, 415 552, 415 75, 416177, 175107, F01D 2500, F03B 1300
Patent
active
050982583
ABSTRACT:
A multistage drag turbine assembly is provided for use in a downhole motor, the drag turbine assembly comprising an outer sleeve and a central shaft positioned within the outer sleeve, the central shaft having a hollow center and a divider means extending longitudinally in the hollow center for forming first and second longitudinal channels therein. A stator is mounted on the shaft. The stator has a hub surrounding the shaft and a seal member fixed to the hub, wherein the hub and the shaft each have first and second slot openings therein. A rotor comprising a rotor rim and a plurality of turbine blades mounted on the rotor rim is positioned within the outer sleeve for rotation therewith with respect to the stator such that a flow channel is formed in the outer sleeve between the turbine blades and the stator. A flow path is formed in the turbine assembly such that fluid flows through the turbine assembly flows through the first longitudinal channel in the central shaft, through the first slot openings in the shaft and the stator hub, through the flow channel wherein the fluid contacts the edges of the turbine blades for causing a drag force thereon, and then through the second slot openings in the stator hub and the shaft into the second channel.
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"Hydraulic Downhole Drilling Motors Turbodrills and Positive Displacement Rotary Motors", Tiraspolsky, edited by Gulf Publishing Co., 1985.
Lee Michael S.
Look Edward K.
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