relation: https://khub.utp.edu.my/scholars/7655/ title: Various mathematical model of torsional vibration in oil well drill string and their validation techniques creator: Bin Iman, H. creator: Pao, W. description: 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). publisher: Asian Research Publishing Network date: 2016 type: Article type: PeerReviewed identifier: Bin Iman, H. and Pao, W. (2016) Various mathematical model of torsional vibration in oil well drill string and their validation techniques. ARPN Journal of Engineering and Applied Sciences, 11 (22). pp. 13389-13391. ISSN 18196608 relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85007249843&partnerID=40&md5=c283c14d8cc2faa0296c4c17731c471e