Non-magnetic drilling motor  is a kind of  drilling motor  developed for the purpose of gas drainage and hydrology exploration in coal industry. In the previous orientation process of ordinary  drilling tools, due to the distance between the instrument and the drill bit, the operation track of the drill bit could not be strictly controlled, and there was a certain lag. So it’s designed as a magnetic free drilling motor so that the orientation instrument is closer to the drill bit, which facilitates orientation, as it is used for drilling deep underground, it is often encountered with high hardness rock,  as this point, the drilling torque of the drilling motor  is required to be large enough to meet the requirements of use. Moreover, due to the harsh drilling environment, the working stability of the drilling motor  is also very important, so as not to affect the downhole working efficiency.