ROLLER-AND-BLADE DOWNHOLE ENGINE Russian patent published in 1999 - IPC

FIELD: making holes. SUBSTANCE: engine displacement is increased many times. Two-section working chambers of engine are connected in parallel to passages of manifold at helical overlapping of high-and low-pressure zones. Blades of rotor located in working chambers are provided with sealing rollers and sealing pins. Necks of rotor and contactors are mounted in bearings received by split sections of multi-section partitions. EFFECT: considerable increase of engine displacement at limited engine diameter; considerable reduction of engine length; improved serviceability of rotor and contactors; enhanced efficiency. 2 cl, 4 dwg