Analysis of stick-slip vibration characteristics of drill-string induced by Power-Ⅴ
Stick-slip motion is a vibration that affects drilling efficiency and downhole drill-string safety.The Power-Ⅴ can provide an effective deviation control force and also induce stick-slip vibration of drill-string in vertical drilling systems.This study investigates the stick-slip vibration characteristics of a drill-string induced by Power-Ⅴ.The interaction between Power-Ⅴ and the wellbore,and the contact model between the bit and formation were studied.The action mechanism of Power-Ⅴ was extensively analyzed,and its influence on torsional vibration was investigated using the finite element method for drill-string dynamics.The results show that the interaction between Power-Ⅴ and the borehole wall significantly increases the friction between the drill-string and borehole wall,resulting in an increase in the friction torque and inducing downhole stick-slip vibration.The measured vibration data confirmed the interaction between Power-Ⅴ and the borehole as the key factor causing the stick-slip vibration of the drill-string.This study is significant in revealing the causes of stick-slip vibration and maximizing the use of Power-Ⅴ.
stick-slip vibrationdrill-string dynamicsvibration signal measurementPower-Ⅴ
NETL
NSTL
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