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In the course of sidetracking of horizontal holes, lateral drill string vibration often occurs. 在水平井的侧钻过程中,钻柱很容易发生横向振动,引发钻柱失效、井眼扩径等严重事故。
ANALYSIS ON DRILL STRING VIBRATION OF DEEP WELLS 深井钻柱振动规律的分析及应用
Lateral drill string vibration in horizontal holes 水平井侧钻过程中钻柱横向振动规律的研究
Analysis and Application of Drill String Vibration Signal 钻柱振动信号的分析与应用
drilling string vibration 钻柱振动
The drill string is rotated by rotary table. 钻柱是由转盘驱动的。
The results show that longitudinal vibration of drill string is relative to rotary speed and weight on bit(WOB). 实验结果表明,钻柱的纵向振动主要与转速和钻压有关。
The major reasons are:the lateral vibration caused by the mass imbalance force,the drilling string whirling and collision. 带扶正器下部钻柱组合失效的主要原因有二：一是下部钻柱的质量不平衡引起横向振动；二是钻柱进动和碰摩。
Analysis of friction on drill string in horizontal drilling. 水平井管柱下入摩阻分析及应用。
An example proved the view, while the WOB is transferred by spring and fluid pressure, the vibration of drill string can lie diminished. 实例分析验证了这种观点。同时由于压力是靠弹簧和液压传递的，所以其还有减振的效果。
When you play a violin, the violin string vibrates. 当你拉小提琴时，琴弦就振动。
BHA vibration experiment, based on analysis of forces born by drilling string at bottom hole, is done by imposing 3 typical underground forces on certain combination drilling string. BHA振动实验是在分析井下钻柱受到的作用力的基础上，通过对某组合的钻柱施加3种典型的井下作用力进行实验，利用设计的振动测量系统检测并分析数据，得到BHA的邵分振动规律；
Saltwater mud is known to have a very strong corroding effect on drill string. 人们知道,盐水泥浆对钻具有很强的腐蚀作用。
Displace mud with 30 SPM each 30 minutes while working the drill string. 每30分钟顶替泥浆30冲，同时活动钻柱。
When you play a violin , the violin string vibrates. 当你拉小提琴时，琴弦就振动。
It is composed of the XD-I vibroscope based on the string vibration and the XQ-I fibre tensile tester with pneumatic clamp operating and data processing function. 本文介绍了一种用于测量纤维力学性能的新型测试仪器.;该仪器由按弦振动原理设计的XD-1型振动式细度仪及具有气动夹持操作及数据处理功能的XQ-1型纤维强伸度仪组成。
The calculation results demonstrate the effective eccentricity and the lifting force of the upper drill string are the major influential factors. 计算结果表明，有效偏心距和上部钻柱的提升力是影响近井口套管偏磨的主要因素。
Strings vibrate when plucked [strummed]. 弦在拨弄时会颤动。
The flexible drill string is one of the key tools to materialize the high accuracy directional drilling technique. 挠性钻杆是实现高精度定向钻孔技术的关键器具之一。
The key factors affecting frictional pressure loss in narrow annuli are changing annular dimensions, rotation and vibration of drill strings. 影响窄环空中摩擦压降的关键因素为环空尺寸的变化、钻柱的旋转和振动。