Abstract: Abstract. In deepwater riserless drilling, the effects of the drillship’s motion and ocean currents on the drill string create complex dynamics that remain poorly understood. Previous studies revealed self-excited vibration ...

Abstract: Understanding drill string dynamics is essential to improving drilling efficiency and preventing accidents. Previous studies have mainly focused on self-excited oscillations due to stick–slip and bit-bounce. However, in ...

Abstract: Understanding drill string dynamics is essential to improving drilling efficiency and preventing accidents. Previous studies have mainly focused on self-excited oscillations due to stick–slip and bit-bounce. However, in ...