Drill pipe joints fatigue analysis and optimization under special working conditions
Yadong Li,
Minghu Nie,
Kaili Hu
et al.
Abstract:Recently, the number of ultra-deep and extended reach wells has continuously increased. The failure of the drill pipe is prominent when drilling. The thickened area of the drill pipe body and the position of the drill pipe joint often appear fatigued, especially the internal thickening zone for the nonlinear structure of the cast component. Fatigue failure occurred at the drill pipe joint due to non-linear contact between the male and female snaps. The fatigue life S-N curves show that the overall life of dril… Show more
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