摘要
钻柱在钻井施工过程中的受力状况十分复杂,钻柱轴向与横向振动的耦合影响着整个钻进过程。以定向井钻柱为研究对象,利用有限元法建立了对整体钻柱进行受力分析的数学模型。在对钻柱单元进行线性分析的基础上,考虑钻柱横向振动对轴向变形的影响,建立了钻柱耦合振动的动力学方程,编制了计算程序,计算出了钻柱发生轴向与横向非线性耦合振动的共振频率。
The force on the drillstring is very complex in the process gitudinal and lateral coupled vibration of drillstring impact on the Taking the direction well drillstring as study object,the finite elem whole drillstring model. On the basis of the linear analysis of the d of the whole drilling process wells. The lon of the drilling. ent was used to establish therillstring module, consideringthe lateral vibration on the effect of the axial deformation, the dynamic equation of coupled vibration of drillstring was deduced. The resonant frequency of nonlinear longitudinal and lateral coupled vibration of drillstring was obtained by a computer program.
出处
《石油矿场机械》
2012年第3期39-42,共4页
Oil Field Equipment
基金
国家科技重大专项(2011ZX05021-006)
关键词
钻柱
耦合振动
非线性耦合
定向井
共振
drillstring
coupled vibration
nonlinear coupled
direction well
resonance
