When drilling vertical and declined wells, the volumetric tool takes the working position under the action of its own gravity. Determination of the dependence of the resistance coefficient C_R, fluid resistance force F_C and speed of movement of the removable tool v on its weight, length, angle of inclination of the well, viscosity of the flushing fluid and the size of the annular gap was carried out on a specially made experimental stand by the method of falling weight.