Downhole drill string on a very good state of motion simulation platform

In order to better study the downhole drill string motion state, the establishment of underground process simulation laboratories, downhole drill string have a good state of  synthetic diamond  platform, but the bottom of the drill string in motion by the radial and axial force and torque measurement at home and abroad without ancillary measuring equipment. Therefore, development of a set of  cubic boron nitride  measurement of the system, so that the bottom of the laboratory of the state of motion of the drill string has the ideal measurement tool. A  cutting tools  the basic structure and principle, the overall structure of the measurement system for analog drillstring range of different diameters and different specifications for, the development and adoption of hardware are: ① four-component force sensor, 2 sets of ranges are 12kN type and 4kN type; ② speed sensor; ③ signal modulation circuit;