Fatigue of drill string connections

F. P. Brennan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


This paper reports full-scale tests on threaded connections used in drill strings. A concise background is given concerning the in-service environment and loading conditions on the connections. This details some of the reasons particular steels are used in preference to others. Crack growth data is given for ten full-scale axial and rotating bend tests. This is compared with predictions from a dedicated weight function fracture mechanics solution designed for threaded connections. Crack aspect ratio is considered with a view to development of an appropriate empirical model.

Original languageEnglish
Pages (from-to)126-132
Number of pages7
JournalJournal of Offshore Mechanics and Arctic Engineering
Issue number2
Publication statusPublished - 1 May 1995


  • fatigue
  • drill strings
  • fracture
  • steel
  • weight
  • fracture mechanics


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