Based on the analysis of the research results of torsional vibrations of the drilling string and lateral beats of the bottomhole motor frame, the range of circular frequency of the top drive is determined depending on the geometric parameters of the gerotor mechanism.

As a result of performed computational experimental studies, the values of the critical circular frequency of the drilling string jointly with the bottomhole motor on an inclined direction of the well, taking into account the load on the bit, technical characteristics and composition of the drilling tool, were recommended. Recommendations on the choice of parameters of the drilling mode were set out.