基于ANSYS软件的钻柱横向振动分析  

Lateral Vibration Analyses of Drilling String with ANSYS Software

作　　者：龙尧[1] 王安义[2] 伍嘉亨 胡立明[1] 

机构地区：[1]华北油田第一采油厂,河北任丘062552 [2]西南石油大学机电工程学院,四川成都610500

出　　处：《西部探矿工程》2010年第8期42-44,共3页West-China Exploration Engineering

摘　　要：采用ANSYS分析软件对2000m以内钻柱在垂直孔、不考虑接头影响和忽略钻头几何尺寸条件下的整体横向振动进行分析,得到钻铤长度、钻柱长度对固有频率的影响及具有意义的一些认识,同时获得钻柱横向振动的1、2、3、4、5阶固有振型。结果表明:钻柱的横向振动低阶固有频率随钻铤长度的增加而增加,而高阶固有频率随着钻铤长度的增加很快又降低;固有频率随着钻柱长度的增加而减小。为实际钻进工程提供理论依据。The lateral vibration of the drilling string are analyzed by using software ANSYS, under following conditions-within 2000m straight borehole,ignoring the effects of tool joint, size of drill bits. The relationship between the inherent frequency of drilling string and length of drill collars, length of drill pipes are gained. Meanwhile one to five step inherent frequency of drilling string lateral vibration are gained. Results indicate that the lowlevel inherent frequency increases with a rise in the length of the drill collar, while the high-level inherent frequency soon decreases, and the inherent frequency reduces with a rise in the length of the drilling string. The results provides a theoretical basis for the actual drilling projects.

关 键 词：钻柱 横向振动 固有频率 有限元分析 

分 类 号：TE24[石油与天然气工程—油气井工程]