自动防斜钻井液压系统导向套仿真分析与优化

发布时间：2018-05-07 15:29

本文选题：导向套 + Fluent　；参考：《武汉科技大学》2015年硕士论文

【摘要】：我国很多地区在石油开采过程中经常会遇到井斜问题，严重限制石油开发工程的发展。通过自动垂直钻井系统中的液压纠斜系统可以解决这一难题。然而由于导向活套与钻杆通过轴承，难以产生纠斜力。通过利用井下返程泥浆在上行过程产生使活套转动的反向运动的扭矩，保证纠斜系统的正常运行。这就要求我们对导向活套的井下流场进行深入分析研究，对比影响反向扭矩值大小的因素，，从而得到最优导向套模型。本文通过建模软件SolidWorks对导向套进行建模，建立具有导流叶片的导向套和旋转钻柱组合的多场耦合动力学理论模型，然后将模型导入ICEM分析，最终利用CFD软件FLUENT进行仿真分析对比。通过仿真结果进行分析对比，揭示导流叶片数、叶片截面形状等关键参数与相对转速差的关系曲线，探寻合理的转矩控制规律。最终得到了不同的压力云图及扭矩值，通过分析压力及扭矩值发现现有导向套模型存在不足需要进行优化设计。在对导向套与井下模型模拟分析及理论推导的基础上，对现有的导向套结构进行优化设计，并对比改进前后泥浆对导向套产生的泥浆。结果表明，改进是有效的，改进后的导向套能产生更大的扭矩。
[Abstract]:In many areas of our country, the problem of well deviation is often encountered in the process of petroleum exploitation, which seriously restricts the development of oil development engineering. This problem can be solved by hydraulic skew correction system in automatic vertical drilling system. However, because the guide looper and the drill pipe pass through the bearing, it is difficult to produce the oblique force. In order to ensure the normal operation of the rectifying system, the reverse motion torque of the looper is produced by using downhole return mud in the upward process. This requires us to deeply analyze the downhole flow field of the guide looper and compare the factors that affect the value of the reverse torque to obtain the optimal guide sleeve model. In this paper, the guide sleeve is modeled by the modeling software SolidWorks, and the multi-field coupling dynamics model with guide sleeve and rotary drill string is established, and then the model is introduced into ICEM analysis. Finally, CFD software FLUENT is used for simulation analysis and comparison. Through the analysis and comparison of the simulation results, the relationship curve between the key parameters such as the number of guide blades, the shape of blade section and the relative rotational speed difference is revealed, and the reasonable torque control law is explored. Finally, different pressure cloud diagrams and torque values are obtained. By analyzing the pressure and torque values, it is found that the existing guide sleeve model needs to be optimized. On the basis of simulation analysis and theoretical derivation of guide sleeve and downhole model, the existing guide sleeve structure is optimized and the mud produced by the slurry before and after improvement is compared. The results show that the improvement is effective and the improved guide sleeve can produce more torque.
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE92

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