FATIGUE-RESISTANT THREADED COMPONENT FOR A TUBULAR THREADED JOINT

摘要

One part of the threads (12) of the inventive threaded component (2) is provided with a helicoidal groove (22) that emerges at the thread top. The groove (22) is made in all or part of the threads of one or two end zones, namely the zone comprising the first engaged threads (32) and the zone comprising the last engaged threads (36), and said groove can also be optionally made in the threads in the zone comprising the middle threads (34). The groove reduces the stiffness of the threads having a groove in the end zone(s) in relation to the stiffness of the threads in the zone comprising the middle threads. The tubular threaded joint obtained after screwing the threaded component to a twin threaded component is much more resistant to the cyclical axial compression and/or traction and/or even flexion strains.