TY - JOUR PB - Asian Research Publishing Network SP - 13389 AV - none N2 - Modern techniques to model torsional drill string vibration have positive impact to the efficiency of oil and gas drilling. The need for torsional model is evident from their detrimental effect to the bottom hole assembly (BHA) fitness. The model can cater planning for more efficient parameter selections for BHA and controlling surface parameter to reduce such vibration. In this paper, the models for torsional vibrations are classified based on their functional concept. The validation techniques are also reported with each classification of the model for torsional vibrations. © 2006-2016 Asian Research Publishing Network (ARPN). SN - 18196608 TI - Various mathematical model of torsional vibration in oil well drill string and their validation techniques IS - 22 ID - scholars7655 EP - 13391 JF - ARPN Journal of Engineering and Applied Sciences VL - 11 Y1 - 2016/// N1 - cited By 0 A1 - Bin Iman, H. A1 - Pao, W. UR - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85007249843&partnerID=40&md5=c283c14d8cc2faa0296c4c17731c471e ER -