钻柱的动力不稳定性  

Dynamic Instability of Drill Stem

作　　者：王珍应[1] 徐铭陶[2] 

机构地区：[1]西南石油学院机械系 [2]重庆大学工程力学系

出　　处：《石油机械》1991年第9期19-24,5,共6页China Petroleum Machinery

摘　　要：从整体钻柱入手,考虑波动轴向力、钻井液的流动和质量,以及钻柱旋转的影响,建立了较接近实际的钻柱弯曲振动模型;推导出钻柱弯曲振动的偏微分方程并求出弯曲振动的频率;角渐近线方法确定在波动钻压作用下钻柱的动力不稳定区域,分析了动力失稳的特点及影响动力不稳定区域的因素。In consideration of the influence of the fluctuating axial force, the flowage and mass of drill fluid and the rotation of drill stem, the authors set up a model of drill stem bending vibration, closing to the actual working conditions of the drill stem system, derive the partial differential equation of the drill stem bending vibration, work out the vibration frequency, determine by asymptote method the dynamically unstable region on the drill stem under fluctuating drilling load, and give a description of the characteristics of dynamic destabilization and the factors affecting the dynamically unstable regions.

关 键 词：钻柱 振动 动力稳定性 

分 类 号：TE921.207[石油与天然气工程—石油机械设备]