TURBODRILL TURBINE Russian patent published in 1994 - IPC

FIELD: well drilling equipment. SUBSTANCE: turbodrill turbine has rotor 1 and stator 2 with hubs 3 and 4. Bladings 5 and 6 are made in the form of blades 7 with ferrules 8 and are of split type with their flat joint 9 passing through points of maximum bend of surfaces of blades 7. Outlet portions 10 and 11 of bladings 5 and 6 may be manufactured of more wear-resistant material than their inlet portions 12 and 13. Outlet portion 10 of blading 5 may be identical to inlet portion 13 of blading 6 and inlet portion of blading 5 to outlet portion 11 of blading 6. EFFECT: simplified process of hydraulic turbine manufacture. 3 cl, 2 dwg