本文關(guān)鍵詞： 油管 套管 磨損效率 強(qiáng)度分析　出處：《西安石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：在采油工程中,油管屬于超細(xì)長(zhǎng)桿管柱,在軸向的壓力下會(huì)產(chǎn)生屈曲,并且由于受到井眼軌跡、油管與套管柱自重和施加載荷的影響,通常會(huì)使油管和套管產(chǎn)生隨機(jī)接觸和摩擦,出現(xiàn)往復(fù)摩擦磨損。致使管壁局部壁厚減薄,壁厚減薄的管柱抗內(nèi)壓和抗外壓能力降低,從而影響管柱安全使用。目前國(guó)內(nèi)對(duì)于油管屈曲與套管產(chǎn)生軸向的摩擦磨損方面的研究非常少。本文采用往復(fù)式油管-套管磨損實(shí)驗(yàn)機(jī)進(jìn)行油管-套管的磨損實(shí)驗(yàn),確定BG140套管和P110油管之間的磨損效率和摩擦系數(shù),使用失重法測(cè)出套管的磨損量。利用磨損套管的月牙形模型計(jì)算得到磨損深度,結(jié)合有限元軟件計(jì)算磨損套管的強(qiáng)度。實(shí)驗(yàn)表明隨著正壓力的增大,P110油管對(duì)BG140套管造成的磨損失重量增大。隨著摩擦頻率的增大,P110油管對(duì)BG140套管造成的磨損失重量也增大。在相同密度1.2g/cm3的水基環(huán)空保護(hù)液介質(zhì)環(huán)境和有機(jī)鹽環(huán)空保護(hù)液介質(zhì)環(huán)境中,正壓力和摩擦頻率保持不變,相同時(shí)長(zhǎng)內(nèi)P110油管對(duì)BG140套管的磨損程度和磨損效率在前者介質(zhì)環(huán)境中遠(yuǎn)遠(yuǎn)大于后者。利用White的磨損-效率模型以及通過(guò)實(shí)驗(yàn)確定的磨損效率,計(jì)算得到磨損實(shí)際時(shí)間、磨損截面面積、套管接觸力等參數(shù),最終得到套管磨損最大深度在水基環(huán)空液和有機(jī)鹽環(huán)空液介質(zhì)中分別為0.19和0.52mm。利用ANSYS軟件分別計(jì)算兩種介質(zhì)環(huán)境中的磨損套管的強(qiáng)度得知,磨損套管的最大應(yīng)力均產(chǎn)生在套管內(nèi)部與油管接觸面形成的月牙型凹槽。水基環(huán)空保護(hù)液介質(zhì)環(huán)境中磨損套管的最大應(yīng)力為235MPa,有機(jī)鹽環(huán)空保護(hù)液介質(zhì)中磨損套管的最大應(yīng)力為216MPa。二者的最大應(yīng)力處均遠(yuǎn)遠(yuǎn)小于BG140套管材料的許用應(yīng)力。綜上所述,在兩種介質(zhì)環(huán)境中的套管均能保證井下管柱完整,進(jìn)行安全生產(chǎn)。
[Abstract]:In the oil production project, the tubing belongs to the super slender rod string, which will be buckled under axial pressure, and it will be affected by the hole trajectory, the weight of tubing and casing string and the application of load. In general, the tubing and the casing will be subjected to random contact and friction, and reciprocating friction and wear will occur, resulting in the reduction of the local wall thickness of the pipe and the decrease of the resistance to internal and external pressure of the pipe string with the thinning of the wall thickness. At present, there are few researches on friction and wear of tubing buckling and casing. In this paper, a reciprocating tube-casing wear tester is used to test the wear of tubing and casing. The wear efficiency and friction coefficient between the BG140 casing and the P110 tubing are determined, and the wear amount of the casing is measured by using the weightlessness method. The wear depth is calculated by using the crescent model of the worn casing. The strength of wear casing is calculated with finite element software. The experimental results show that the wear weight loss caused by P110 tubing to BG140 casing increases with the increase of positive pressure, and the weight loss caused by P110 tubing on BG140 casing increases with the increase of friction frequency. At the same density of 1.2 g / cm ~ 3, in the water base ring space protection medium environment and the organic salt ring space protecting liquid medium environment, The positive pressure and friction frequency remain constant, and the wear degree and wear efficiency of P110 tubing to BG140 casing in the same time are much higher than that of the latter in the former medium. The wear efficiency is determined by using White's wear-efficiency model and experiments. The actual wear time, wear cross section area, casing contact force and other parameters are calculated. Finally, the maximum wear depth of casing in water-based annular fluid and organic salt annular liquid medium is 0.19 and 0.52 mm. the strength of wear casing in two media environments is calculated by ANSYS software. The maximum stress of the wear casing is the crescent groove formed by the contact surface between the casing and the tubing. The maximum stress of the worn casing is 235 MPA in the water base annulus protection medium, and the wear casing is in the organic salt annulus protective fluid medium. The maximum stress of both is much smaller than the allowable stress of BG140 casing material. The casing in both media environment can ensure the integrity of downhole tubing string and safe production.
【學(xué)位授予單位】：西安石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE931.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張毅,李鶴林,陳誠(chéng)德;我國(guó)油井管現(xiàn)狀及存在的問(wèn)題[J];焊管;1999年05期

2 方劍;李陽(yáng)華;謝凱意;鄒喜洋;張業(yè)勝;袁澤喜;;P110鋼級(jí)套管探傷合格率偏低原因分析[J];金屬熱處理;2011年S1期

3 劉巨保;王秀文;岳欠杯;黃金波;;受壓油管屈曲變形與內(nèi)外層桿管接觸分析[J];力學(xué)與實(shí)踐;2011年03期

4 肖國(guó)章;許文妍;韓勇;歐陽(yáng)春;;全尺寸套管磨損試驗(yàn)研究[J];石油礦場(chǎng)機(jī)械;2007年10期

5 殷有泉;李平恩;;非均勻載荷下套管強(qiáng)度的計(jì)算[J];石油學(xué)報(bào);2007年06期

6 覃成錦,徐秉業(yè),高德利;套管磨損后剩余抗擠強(qiáng)度的數(shù)值分析[J];石油鉆采工藝;2000年01期

7 竇益華;張福祥;王維君;張紹禮;;井下套管磨損深度及剩余強(qiáng)度分析[J];石油鉆采工藝;2007年04期

8 關(guān)舒?zhèn)?李春福;李學(xué)藝;王喜梅;陳金鎖;;非均勻外擠壓力作用下內(nèi)徑偏磨套管的應(yīng)力分析[J];石油鉆探技術(shù);2009年02期

9 李軍;柳貢慧;;非均勻地應(yīng)力條件下磨損位置對(duì)套管應(yīng)力的影響研究[J];天然氣工業(yè);2006年07期

10 高智海,楊勇,趙克楓;套管磨損的研究進(jìn)展[J];西安石油學(xué)院學(xué)報(bào)(自然科學(xué)版);1999年02期

相關(guān)碩士學(xué)位論文 前1條

1 王龍庭;鉆井連續(xù)管力學(xué)特性研究[D];中國(guó)石油大學(xué);2008年

，

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