로타리 드릴링 리그용 켈리바의 구조 신뢰성

The kelly bar structure of rotary drilling rig was designed and developed successfully. In this research, static analysis was performed by commercial software ANSYS 12.0. The real properties of material and working conditions were applied to simulate the working process of kelly bar structure. Investigate the performance of the design prototype product, structure safety at repeated load. Furthermore, more plans to develop the kelly bar structure were also proposed as a further study in this paper.