Hydraulic multistage turbine of turbodrill
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United States of America Patent
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Jun 30, 1987
Issued Date -
N/A
app pub date -
Nov 4, 1985
filing date -
Feb 17, 1984
priority date (Note) -
Expired
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Abstract
A hydraulic multistage turbine each stage of which comprises a stator and a rotor having rings with flow channels and hubs carrying the bladings. There are stages wherein the blades of the bladings are made with an angle of curvature of the camber line greater than an angle formed by the tangent to this line at the exit of the blading and the axis of drilling fluid flow. In a stage wherein the ring has such blades it is provided with by-pass channels arranged hydraulically parallel to the flow channel of the ring and communicating the space between this ring and an upstream ring with a space between this ring and a downstream ring for discharging part of the drilling fluid from the flow channel.
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