The tapered screw joints are widely used in the formation of the drill string. They consist of two parts - a box and a pin. during the process of screwing box and a pin the contact pressure between thread surfaces arises, the magnitude of which affects the intensity of wear on these surfaces. For the first time, the authors offer in this work to ch...

By Oleh Onysko, Volodymyr Kopei, Vitalii Panchuk