【摘要】：隨著井下裝備不斷發(fā)展,封隔器作為井下工具之一逐漸的被廣泛使用,封隔器在油井作業(yè)中起到的作用是實現(xiàn)油井深度方向上的分層作業(yè),然而石油開采行業(yè)的不斷發(fā)展,使得油田作業(yè)變得復(fù)雜多樣。作業(yè)開采時,井下工況復(fù)雜多變;而且油田的絕大部分油區(qū)都已進(jìn)入高含水或特高水開發(fā)階段,地下層內(nèi)、層間矛盾突出,為了確保原油生產(chǎn)產(chǎn)量,必將增加采油作業(yè)成本。有些油井內(nèi)部,因溫度、壓力降低和氣體膨脹的冷卻作用,所以在一定深度上,油水層的壓差及溫度的不同,使得封隔器的橡膠部件產(chǎn)生失效,從而給油田開采帶來嚴(yán)重不便。本文對現(xiàn)有的Y341型封隔器進(jìn)行了結(jié)構(gòu)設(shè)計,得到新型封隔器的主要結(jié)構(gòu)參數(shù),然后通過建立膠筒和套管之間的非線性接觸模型,在膠筒坐封過程的基礎(chǔ)上進(jìn)行了有限元數(shù)值模擬,通過ANSYS軟件對不同壓力載荷下封隔器膠筒與套管之間的接觸應(yīng)力與壓縮距進(jìn)行分析,得到膠筒力學(xué)性能的規(guī)律和有實際意義的模擬結(jié)果。采用有限滑動接觸模型定義了膠筒與隔環(huán)、套管、中心管的接觸。經(jīng)過計算,得出結(jié)論認(rèn)為封隔器的結(jié)構(gòu)設(shè)計是合理的。最后建立卡瓦與套管之間的接觸模型,利用ANSYS軟件分析卡瓦牙上的應(yīng)力情況以及與套管咬合深度的關(guān)系,得到卡瓦上齒的應(yīng)力分布情況,隨著齒數(shù)編號的增加,位移與所受到的應(yīng)力都逐漸減小,隨著載荷增加,卡瓦咬入深度也呈現(xiàn)增加的趨勢。
[Abstract]:With the continuous development of downhole equipment, Packer, as one of downhole tools, has been widely used. The role of Packer in oil well operation is to realize layering operation in oil well depth direction. However, with the development of petroleum production industry, Make oil field operation become complex and diverse. In order to ensure the production of crude oil, the cost of oil production will be increased because most of the oil fields have entered the stage of high water cut or super high water development, and the contradiction between the layers is prominent in the underground layer in order to ensure the production of crude oil. In some wells, due to the cooling effect of temperature, pressure reduction and gas expansion, the pressure difference and temperature of oil-water layer are different in a certain depth, which makes the rubber parts of the Packer fail, thus causing serious inconvenience to oilfield production. In this paper, the structure of the existing Y341 Packer is designed, the main structural parameters of the new Packer are obtained, and then the nonlinear contact model between the rubber cylinder and the casing is established. The finite element numerical simulation was carried out on the basis of the process of rubber cylinder sitting and sealing, and the contact stress and compression distance between the Packer cylinder and the casing under different pressure loads were analyzed by ANSYS software. The law of mechanical properties and the practical simulation results are obtained. A finite sliding contact model is used to define the contact between the rubber cylinder and the spacer, casing and central tube. After calculation, it is concluded that the structure design of the Packer is reasonable. Finally, the contact model between the slips and the casing is established. The stress distribution of the upper teeth of the slips is obtained by using the ANSYS software to analyze the stress situation on the teeth and the relationship between the depth of the casing bite and the tooth number, and with the increase of the number of teeth, the stress distribution of the upper teeth of the slips is obtained. The displacement and stress decrease gradually, and the bite depth increases with the increase of load.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE931.2

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