A New Analytical Model on Lateral Vibration and Impact of Drill String - Choice of Safe and Fast Drilling
The severe lateral vibration and impact of drill string will not only cause the damage of drill string but also have bad effects on the quality of directional drilling operation. It is difficult to control lateral vibration amplitude and impact intensity even with advanced measurement apparatus while drilling. So it is feasible to use a theoretic method to analyze and predict lateral vibration of drill string in order to adjust and optimize drilling parameters in real-time. On the basis of beam-column series and spring-concentrated mass model, a new analytical model is established to realize the control of lateral vibration and impact by controlling some key factors, such as under-gauge stabilizer, initial phase angle and initial deformation, WOB (weight on bit) and ROB (rotation of bit).
W. Liu et al., "A New Analytical Model on Lateral Vibration and Impact of Drill String - Choice of Safe and Fast Drilling", Applied Mechanics and Materials, Vols. 29-32, pp. 2350-2355, 2010