TURBODRILL WITH REDUCTION GEAR Russian patent published in 2000 - IPC

FIELD: drilling of oil and gas wells by hydraulic downhole motors, particularly, turbodrills with reduction gear. SUBSTANCE: turbodrill turbine has single stages from 10 to 39 of anticlockwise rotation, turbodrill axial bearing located above turbine in chamber filled with oil. Lower end of turbine shaft is connected with magnetic clutch ensuring power transmission to input high-speed shaft of reduction gear including planetary gear with internal gearing. Torsion shaft is connected via tooth-type couplings with output shaft of reduction gear and spindle shaft, and ensures damping of torsional and longitudinal vibrations due to elastic deformations and axial displacements. EFFECT: prolonged service life and high operating reliability of main parts and units of turbodrill with reduction gear due to matching of output characteristics of motor with technology of drilling process. 1 dwg