Key technologies of small multi azimuth directional drilling rig

Because of the problem that conventional directional drilling rigs are large in volume and small inclination angle of openings, which cannot meet the drilling requirements of narrow tunnels in small and medium coal mines, a small multi-directional directional drilling rig has been developed. Based on the development of the ZYWLD series of directional drilling rigs, through the optimization of the layout of the whole machine and the new rotary table design, the main machine is small in size and can be used for multi-directional drilling; by changing the linear type of the stator and rotor, the new structure of the ball One-way valve and improved string bearing materials and structure have realized the long life of the PDM (positive displacement motor) and small size; through the establishment of various error compensation mathematical models of the measuring system inclinometer, high-precision error compensation coefficients have been obtained, forming a set of underground coal mines Borehole inclinometer calibration method to improve the accuracy of the large inclination measurement system. The load performance test was carried out on the host, and the performance parameters of the host reached the design requirements.