Cold root rolling is your solution to expensive, stressed and failing thread roots in drill string connections. By burnishing the thread root in rotary shouldered connections, cold root rolling prolongs the service life of your drilling equipment
In case of elastic deformations, deformable body completely restores the original shape and dimensions after the impact of the external forces terminates, while changes in shape and dimensions caused by the influence of external forces are maintained even after the impact of these forces terminates. In case of plastic deformations, atoms are displaced relative to each other by values larger than the interatomic distances, and do not return to their original positions and take new positions of equilibrium after the impact of external forces is removed.
Cold rolling improves the strength properties of processed surface, increases the resistance to abrasion and cracking.