基于有限元法的钻杆柱纵向振动分析

Study on Longitudinal Vibration of Drilling Pipe Based on Finite Element Method

摘要:

钻杆的纵向振动对钻杆失效有较大影响。采用ANSYS软件对2000 m以内钻杆柱的纵向振动进行了分析，得到了不同钻具规格、不同钻铤长度、不同钻杆柱长度的固有频率，获得了钻杆柱纵向振动的前五阶固有振型。结果表明,钻杆柱的固有频率受钻杆规格和钻铤长度影响很小，受钻杆柱长度影响较大。

Abstract:

Longitudinal vibration of drill pipe has great influence on drill pipe failure. By the analysis on the longitudinal vibration of drill pipes within the length of 2000m with ANSYS software, the intrinsic frequency of drilling pipes with different specifications, drill collars and drilling strings with different length as well as the first 5 natural vibration modes of longitudinal vibration of drill string are obtained. The results show that the intrinsic frequency of drilling pipe is slghtly affected by the drilling pipe specifications and drill collar length, but by drill pipe length a lot.