... Abstract As a result of many industry efforts, the premature fatigue failure of undamaged coiled tubing (CT) strings is almost negligible. However, despite the current understanding and control of low-cycle fatigue, CT string failures remain present in the industry. Several prior technical...

... Abstract "Pure" fatigue failures (i.e. not started by corrosion or mechanical damage) are not common in coiled tubing strings because of the implementation of systems/models to manage the fatigue life. However, in recent years, a series of "pure" fatigue failures occurred on bias welds of high...

... as to what are the critical factors for obtaining reliable CT service life performance and whether or not reliability is higher today than a decade ago. US government fatigue failure wall thickness Coiled tubing operations Well Intervention Conference Completion Installation and Operations weld...