... Abstract In recent years, drilling programs have become significantly more aggressive and challenging. Rotary shouldered connections (RSC) in extended reach and ultra-deep wells face unprecedented loads. Torque is one of the constraints imposed by modern drilling applications on standard RSC...

.... Further elaboration here would simply be a repeat of these and other widely referenced publications. With the basic premise for how make-up torque is calculated now defined, the next important concept to investigate is the RSC Combined Load Curve (CLC). Details related to this material are also well...

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... ABSTRACT This paper presents an analysis of the makeup torque influence on Rotary Shouldered Connection (RSC) reliability under static and dynamic loads. Both theoretical and experimental results of torque-turn diagrams and full scale fatigue tests are shown. The paper gives recommendations...

... . ABSTRACT This paper presents a case history of drillstring failures in some ultradeep wells drilled in Italy. A new method to optimize the selection of the most suitable Rotary Shouldered Connections (RSC) and failure analysis is developed by using a new factor identified as Fatigue Strength Ratio ( FSR...