全部

1·The implicit expression of displacement of string vibration was established by the time integration method.

由时间积分法建立了弦振动位移的隐式表达式。

2·Finally, the paper introduced effective control methods of common drill string vibration and deviation problem.

最后对常见的钻柱振动和井斜问题介绍了有效的控制方法。

3·This article takes the near-bottom drill string in an extended reach well as the subject to study the drill string vibration rules.

以大位移井近井底的钻柱为研究对象，分析了钻柱振动行为所遵循的规律。

4·It has been proved mathematically, that the string vibration will forms standing waves if its Uper end is fixed while lower end moves round a circle.

从数学上证明了上端固定，下端作圆周运动的弦振动是驻波。络纱时产生的退绕气圈也是这种形式的驻波。

5·Drill string vibration is a common phenomenon in the process of well drilling. Drilling string resonance is the main reason of the drilling string failure.

钻柱振动是在当前钻井工程中的普遍现象，对钻井的影响很大，钻柱共振是钻柱失效的主要原因。

6·Drill string vibration of deep Wells is studied in the article. The axial vibration, lateral vibration and torsional vibration of drill strings are analyzed.

文章研究深井钻柱的振动问题，以深井钻柱为研究对象，分析研究了钻柱的纵向振动、横向振动及扭转振动。

7·A problem about tubing string vibration caused by the fluid unsteady flow inside tubing string is studied from the Angle of solid liquid coupling vibration in dynamics.

文章从动力学中固液耦合振动的角度出发，研究了油管柱内流体不稳定流动引起的油管柱振动问题。

8·A general model is developed to analyze drill string vibration considering the coupled relations between longitudinal vibration, lateral vibration, and twisting vibration.

考虑钻柱的纵向振动、横向振动及扭转振动之间的耦合关系，建立了钻柱振动分析的综合模型。

9·The accurate estimate of the drill string vibration and the corresponding technique are very important to protect the FEWD equipment and increase the comprehensive efficiency.

准确判断井下钻具振动并采取相应的技术措施对于有效保护FEWD测量仪器、提高钻井综合效益具有重要意义。

10·Our research demonstrate that the drill string vibration is forced vibration, it needs to consider the rock-drill bit-drill string-swivel as the drill string vibration system;

研究认为钻柱振动是一受迫振动问题，需要将井底岩石-钻头-钻柱-水龙头作为一个“钻柱振动系统”来对待；