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- Its main functions are maintaining borehole gage,improving drill string stability and protecting lower drill string from excessive wear. 其重要作用是保持钻头尺寸符合标准，提高钻杆稳定性，避免钻杆下部过于磨损。
- Keywords bottomhole assembly;drilling string stabilizer;structure analysis;modification; 钻具组合;钻柱稳定器;结构分析;改进;
- Analysis of the Material Properties and the Size Parameters of Drill String Stabilizer 钻柱稳定器材料性能及尺寸参数分析
- drilling string stabilizer 钻柱稳定器
- The drill string is rotated by rotary table. 钻柱是由转盘驱动的。
- Analysis of friction on drill string in horizontal drilling. 水平井管柱下入摩阻分析及应用。
- A new type anti-whirl stabilizer is designed.The main body of the stabilizer can revolve freely to prevent or reduce the drilling string swirling, so as to reduce the damage to the drilling string. 设计了利用稳定器主体在螺旋套内可自由旋转原理来防止或减少钻柱涡动从而减少对钻柱破坏的新型防涡稳定器。
- 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。
- 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。
- 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。
- You must keep trying to find a new way to protect the drill string from sticking. 你们应当坚持设法找出防止钻具被卡的新方法。
- 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。
- 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。
- 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。
- Therefore we can provide the preanalysis and treatment plans for similar drill string falling accident,so as to shorten accident-losing tim... 为现场处理类似的钻柱落井事故提供预先的分析和处理方案,以缩短事故处理时间,减少经济损失。
- The notion of string stability of a countably infinite interconnection of a class of nonlinear system was introduced. 对一类无限维关联系统引入弦稳定概念。
- Based on the interaction of bit and formation, the force from the rock and bit is used for the boundary condition of the end of the drill string. 在建立了牙轮钻头与井底岩石互作用模型的基础之上,将钻头与井底岩石互作用力矩作为钻柱的下端边界条件。
- A multithread wireless system is developed to measure the four-component forces acting on a simulated drill string on a LabVIEW workbench. 为分析钻杆的井下受力状态,应用直梁应变片式测力传感器,研制了一种基于虚拟仪器平台的钻杆四分量力测量系统。
