DEVICE MEASURING DRILLING SPEED Russian patent published in 2002 - IPC

FIELD: measurement equipment employed to control parameters of drilling process. SUBSTANCE: invention refers to aids controlling mechanical speed of drilling of geological prospecting holes. Device includes transmission mechanism with intake coil and measuring cable connected with one end to mobile drive of hole borer and linked with the other end to intake coil, angular displacement converter with driving and driven members. Driven member of angular displacement converter is coupled to pulse pickup and is positioned on its shaft and driving member is placed on shaft of intake coil. Driving and driven members form quill driver with value of radial clearance between them equal to or exceeding amplitude of vibration of driving member. Transmission mechanism is fitted with spiral spring located on shaft of intake coil with capability to keep measurement cable in tightened condition. Friction brake acting on driven member to brake shaft of pulse pickup is installed on body of pulse pickup. EFFECT: increased measurement precision under conditions of vibration. 2 dwg