本文選題：導向套 + Fluent　； 參考：《武漢科技大學》2015年碩士論文

【摘要】：我國很多地區(qū)在石油開采過程中經(jīng)常會遇到井斜問題，嚴重限制石油開發(fā)工程的發(fā)展。通過自動垂直鉆井系統(tǒng)中的液壓糾斜系統(tǒng)可以解決這一難題。然而由于導向活套與鉆桿通過軸承，難以產(chǎn)生糾斜力。通過利用井下返程泥漿在上行過程產(chǎn)生使活套轉(zhuǎn)動的反向運動的扭矩，保證糾斜系統(tǒng)的正常運行。這就要求我們對導向活套的井下流場進行深入分析研究，對比影響反向扭矩值大小的因素，，從而得到最優(yōu)導向套模型。 本文通過建模軟件SolidWorks對導向套進行建模，建立具有導流葉片的導向套和旋轉(zhuǎn)鉆柱組合的多場耦合動力學理論模型，然后將模型導入ICEM分析，最終利用CFD軟件FLUENT進行仿真分析對比。通過仿真結(jié)果進行分析對比，揭示導流葉片數(shù)、葉片截面形狀等關(guān)鍵參數(shù)與相對轉(zhuǎn)速差的關(guān)系曲線，探尋合理的轉(zhuǎn)矩控制規(guī)律。最終得到了不同的壓力云圖及扭矩值，通過分析壓力及扭矩值發(fā)現(xiàn)現(xiàn)有導向套模型存在不足需要進行優(yōu)化設(shè)計。 在對導向套與井下模型模擬分析及理論推導的基礎(chǔ)上，對現(xiàn)有的導向套結(jié)構(gòu)進行優(yōu)化設(shè)計，并對比改進前后泥漿對導向套產(chǎn)生的泥漿。結(jié)果表明，改進是有效的，改進后的導向套能產(chǎn)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.
【學位授予單位】：武漢科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE92

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