WELL ENGINE Russian patent published in 2004 - IPC

FIELD: engines for driving rock-destroying means during well-boring. SUBSTANCE: engine has a composition of multiblade turbines, placed with circular spacing in cylindrical body and interconnected by means of threaded axle-boxes. Each turbine has a profiled stator having evenly spaced projections with stepless profile of raising planes on its inner cylindrical surface and also has a toroidal rotor, placed coaxially in contact with top parts of stator projections. Rotor has hubs with grooves for securing telescopic connection of multiple rotors. Composition also comprises main high pressure supplying passage, low pressure passages in profiled stator and radial passages in toroidal rotor, connected to operating enclosure by means of passages in blades. Number of multiblade turbine blades is by one greater than number of profiled stator projections. Turbines are placed with capability of insuring rotation by means of total moment of each blade. EFFECT: increased total moment and efficiency of engine. 3 dwg _