VOLUME DOWNHOLE MOTOR Russian patent published in 2003 - IPC

FIELD: drilling equipment, downhole hydraulic motor designed to drill holes. SUBSTANCE: volume downhole motor has cylindrical body, substitute, races, shaft with sectional blades installed in space of body. One side of blade is made fast to shaft. Another side of blade has sliding contact with internal surface of body. Lower section of blade is attached to shaft outside of body. Races are arranged coaxially in substitute and are directed with inclined outlet to concave surface of blades which convex side faces rotation of shaft. Circular spaces hydraulically communicating with following inclined races are located below point of arrangement of blades, between shaft and body. Blades are attached to shaft with inclination to its rotation. Number of races exceeds number of blades. EFFECT: increased efficiency of downhole motor. 2 cl, 2 dwg