Downhole rotational speed measurement system and method

摘要

A rotational speed measurement system may include a rotational speed measuring device for measuring a rotational speed of a motor or component thereof. The downhole rotational speed measuring device may include a magnet and a magnetic sensor. A telescoping unit may position the magnetic sensor into sensing proximity of the magnet. A method for measuring downhole rotational speed may include coupling a rotational speed measuring device to a measurement assembly and a motor. The rotational speed measuring device may include a magnet and a magnetic sensor. The position of the magnetic sensor, the magnet, or both, may be adjusted with a telescoping unit to place the magnetic sensor into sensing proximity of the magnet. 6557101_1 (GHMatters) P100110.AU LYNT CC)~ Q)( CYi: Nco Q>j ~