CALIBRATOR Russian patent published in 2001 - IPC

FIELD: hole drilling. SUBSTANCE: invention is related to gears for orientation-free control over trajectory and for calibration of shafts. Calibrator has body with outside longitudinal grooves of dove-tail type where separable blades with calibration members are placed. Blades are driven through additional grooves in body by two-step spring-loaded differential piston. In addition calibrator is fitted with separable water-wheel generator and with sedimentation hydraulic giant packings. EFFECT: facilitated sinking of calibrator into crooked hole, prolonged service life and expanded functional capabilities of calibrator. 3 cl, 3 dwg