本文選題：精密復合防砂篩管 + 基管��； 參考：《沈陽航空航天大學》2015年碩士論文

【摘要】：在石油開采過程中，油層出砂是疏松砂層油藏開采的常見問題。防砂篩管作為一種重要的采油防砂設(shè)備，被廣泛應用在石油鉆采工業(yè)中的豎直井、水平井、側(cè)鉆井和分支井等完井中。精密復合防砂篩管屬于防砂篩管的一種，其具有高精度的防砂性能。精密復合防砂篩管所處的地下環(huán)境十分復雜，經(jīng)常由于結(jié)構(gòu)強度不足，導致結(jié)構(gòu)發(fā)生破壞。外護管作用是引導含砂石油的流向從而減少含砂石油對內(nèi)部防砂過濾層的沖蝕磨損，由于外護管直接受到含砂石油的沖蝕作用，極易造成沖蝕破壞，影響使用壽命。因此，對精密復合防砂篩管結(jié)構(gòu)強度的研究和對外護管沖蝕性能的研究具有重要意義。 本文通過使用有限元模擬仿真和實驗研究的方法，對精密復合防砂篩管的結(jié)構(gòu)性能進行分析研究。針對結(jié)構(gòu)強度性能，利用有限元分析軟件ANSYS對精密復合防砂篩管進行豎直井下入強度分析、水平井彎曲段下入強度分析和基管抗外圍壓強度參數(shù)化優(yōu)化分析。獲得了豎直井下入時堵塞情況下的臨界載荷、外護管最優(yōu)材料和外護管縫口處間距的最優(yōu)尺寸；獲得了在通過水平井彎曲段時，徑厚比與徑向變形、等效應力、剪切應力的關(guān)系，，并根據(jù)此關(guān)系，總結(jié)出徑厚比的選取原則；通過對基管抗外圍壓參數(shù)化有限元分析，得到了基管的孔徑參數(shù)和布孔密度參數(shù)與基管結(jié)構(gòu)強度的關(guān)系，為基管圓孔尺寸的設(shè)計提出參考建議。 針對沖蝕磨損性能，利用流體動力學有限元分析軟件CFX，通過對外護管縫口處固液兩相流的模擬分析，獲得了外護管縫口處沖蝕磨損率最大值所在的位置，并獲得了外護管沖蝕磨損速率與沖蝕磨損影響因素的關(guān)系，分析了沖蝕速度、砂粒直徑和含砂質(zhì)量分數(shù)導致結(jié)構(gòu)沖蝕磨損率變化的原因。利用噴射沖蝕實驗，對外護管常用材料316L不銹鋼和304不銹鋼的沖蝕磨損性能進行對比分析，從沖蝕磨損表面行為、沖刷腐蝕性能和沖蝕磨損臨界速度三個方面出發(fā)，對外護管材料的沖蝕磨損性能進行了對比分析，得到了316L不銹鋼的沖蝕性能優(yōu)于304不銹鋼的沖蝕性能。
[Abstract]:In the process of oil production, sand production is a common problem in loose sand reservoir. As an important oil and sand control equipment, sand control sieve pipe is widely used in vertical wells, horizontal wells, side drilling and branch wells in oil drilling and production industry. The precision composite sand control sieve pipe belongs to the sand control sieve pipe, it has the high precision sand control performance. The underground environment of precision composite sand control sieve pipe is very complex. The function of outer protection pipe is to guide the flow direction of sand bearing oil and thus reduce the erosion and wear of sand control filter layer caused by sand bearing oil. Because the outer protection pipe is directly eroded by sand containing oil, it is easy to cause erosion damage and affect the service life. Therefore, it is of great significance to study the structural strength of precision composite sand control sieve pipe and the erosion performance of external protection pipe. In this paper, finite element simulation and experimental study are used to analyze the structure and performance of precision composite sand control sieve pipe. In view of the structural strength performance, the vertical downhole strength analysis of precision composite sand control sieve pipe is carried out by using the finite element analysis software ANSYS, the entry strength analysis of horizontal well bending section and the parametric optimization analysis of the base pipe's external compressive strength are carried out. In this paper, the critical load, the optimum material and the optimum size of the distance between the outer guard pipe and the seam of the outer guard pipe are obtained, and the ratio of diameter to thickness, the radial deformation and the equivalent stress are obtained when passing through the bend section of the horizontal well. According to the relation of shear stress, the selection principle of diameter to thickness ratio is summarized, and the relationship between the structure strength and pore diameter parameter and pore density parameter of base tube is obtained by parameterized finite element analysis of the resistance to external pressure of base tube. Some suggestions are given for the design of round hole of base tube. In view of the erosion wear performance, the location of the maximum erosion rate at the outer pipe joint is obtained by using the fluid dynamics finite element analysis software CFX and the simulation analysis of the solid-liquid two-phase flow at the seams of the outer guard pipe. The relationship between erosion wear rate and erosion wear factors was obtained, and the causes of erosion wear rate, sand diameter and sand mass fraction were analyzed. The erosion wear properties of 316L stainless steel and 304 stainless steel were compared and analyzed by jet erosion test. The erosion wear surface behavior, erosion corrosion performance and erosion wear critical speed were analyzed in three aspects: erosion wear surface behavior, erosion corrosion performance and erosion wear critical speed. The erosion and wear properties of external pipe protection materials were compared and analyzed. The results showed that the erosion resistance of 316L stainless steel was better than that of 304 stainless steel.
【學位授予單位】：沈陽航空航天大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE93

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