Calculation of Longitudinal Vibration of Drill String
The problem of BHA' s failure is serious. Based on theory study, detailed numerical simulation on properties of the drill string was done in this paper. The results show that the property of axial vibration changes while the string dimension and the length of drill string change. The axial vibration natural frequence changes small while the Drill Collar length increases. Due to the influence of the drilling fluid the natural frequency becomes lower. Analysis shows that drilling fluid damper have a certain positive significance on the drill string security.
NETL
NSTL
万方数据
维普
