Abstract: The utility model relates to internal cycloidal gear mechanisms and can be used in various branches of mechanical engineering as working members of hydraulic machines (pumps and engines), compressors, internal combustion engines, as well as in planetary gearboxes, in particular in technical systems for drilling and repairing oil and gas wells. The problems to be solved by the utility model include the improvement of the quality of the process of designing working members having a cycloidal tooth profile, as well as the substantiation of the conditions for modifying cycloidal face profiles (by choosing the required combination of dimensionless gearing coefficients) in order to achieve the maximum or minimum open area of the gerotor mechanism having a different kinematic ratio.

Abstract: The utility model relates to internal cycloidal gear mechanisms and can be used in various branches of mechanical engineering as working members of hydraulic machines (pumps and engines), compressors, internal combustion engines, as well as in planetary gearboxes, in particular in technical systems for drilling and repairing oil and gas wells. The problems to be solved by the utility model include the improvement of the quality of the process of designing working members having a cycloidal tooth profile, as well as the substantiation of the conditions for modifying cycloidal face profiles (by choosing the required combination of dimensionless gearing coefficients) in order to achieve the maximum or minimum open area of the gerotor mechanism having a different kinematic ratio.

Abstract: The invention relates to the field of drilling. A packed-hole assembly comprises a drill bit, and a positive displacement motor having a bending unit for deviation by a tilt angle f, and further comprises a rotation module and a hinge module which are rigidly connected to one another, to drill pipes and to the motor by threaded connections. The rotation module consists of a fixed shaft with a central channel and axial openings for drilling fluid, and a rotating body with radial channels which is mounted on cageless rolling contact bearings such as to be capable of circular movement as a result of the reactive force of drilling fluid flowing into the annulus of the borehole through the axial openings in the shaft, the space between the shaft and the rotating body, and the radial channels in turn.

Abstract: The invention relates to the field of drilling. A packed-hole assembly comprises a drill bit, and a positive displacement motor having a bending unit for deviation by a tilt angle f, and further comprises a rotation module and a hinge module which are rigidly connected to one another, to drill pipes and to the motor by threaded connections. The rotation module consists of a fixed shaft with a central channel and axial openings for drilling fluid, and a rotating body with radial channels which is mounted on cageless rolling contact bearings such as to be capable of circular movement as a result of the reactive force of drilling fluid flowing into the annulus of the borehole through the axial openings in the shaft, the space between the shaft and the rotating body, and the radial channels in turn.