基于犁沟效应的镶齿型卡瓦侧钻坐封器坐封过程数值分析
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摘要
基于开窗侧钻过程中侧钻坐封器卡瓦失效导致开窗失败的情况,设计了一种新型的镶齿型卡瓦侧钻坐封器。建立了承受坐封载荷和轴向载荷下的镶齿型卡瓦装配体有限元法分析模型,计算出了镶嵌不同齿型的侧钻坐封器卡瓦在套管壁上形成的犁沟形状及套管与镶齿的位移与应力,分析了镶齿型卡瓦的坐封可靠性。结果表明:在镶齿型卡瓦坐封分析计算中,不但要考虑犁沟摩擦因数,同时还需要考虑凸脊对犁沟摩擦因数的影响;坐封器卡瓦镶装不同齿型在套管表面产生的犁沟效应不同,卡瓦牙齿齿尖越锋利,所产生的犁沟效应就越明显;在犁沟效应与黏着效应的双重作用下,硬质合金齿吃入套管壁产生了明显的齿坑,在满足镶齿强度的前提下确保镶齿型卡瓦坐封器的可靠坐挂。
Based on the sidetracking packer slips failure led window sidetracking failed in sidetracking process,a new type of inserted tooth slip of sidetracking packer was designed.The FEM analysis model of inserts type slip assembly under bear setting load and axial load was established,the inserted different tooth of sidetracking packer slips formed plough shape on the casing face,the displacement and stress of the casing and tooth were calculated,then setting reliability of the insert tooth packer slips was analyzed.The results show that:in process of analysis and calculation on the insert tooth packer slips,not only the plough friction coefficient needed to consider,the convex ridges impact on the plough friction coefficient also need to consider.Inserted different tooth of the packer slip produced plough effect on the casing surface is different,prongs of slip teeth more sharper,plough effect more obvious.In the dual impact of plough effect and adhesion effect,carbide teeth embeds the casing wall and produces a significant tooth pit,under the condition of satisfying the strength of the inserted teeth,the reliable setting and hanging of inserts type slip of sidetracking packer should be ensured.
Based on the sidetracking packer slips failure led window sidetracking failed in sidetracking process,a new type of inserted tooth slip of sidetracking packer was designed.The FEM analysis model of inserts type slip assembly under bear setting load and axial load was established,the inserted different tooth of sidetracking packer slips formed plough shape on the casing face,the displacement and stress of the casing and tooth were calculated,then setting reliability of the insert tooth packer slips was analyzed.The results show that:in process of analysis and calculation on the insert tooth packer slips,not only the plough friction coefficient needed to consider,the convex ridges impact on the plough friction coefficient also need to consider.Inserted different tooth of the packer slip produced plough effect on the casing surface is different,prongs of slip teeth more sharper,plough effect more obvious.In the dual impact of plough effect and adhesion effect,carbide teeth embeds the casing wall and produces a significant tooth pit,under the condition of satisfying the strength of the inserted teeth,the reliable setting and hanging of inserts type slip of sidetracking packer should be ensured.
引文
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[2]Oyinkepreye David Orodu,Zhonghua Tang,Paul A L Anawe.Sidetrack and recompletion risk evaluation—Waterflooded reservoir[J].Journal of Petroleum Science and Engineering.2011,78:705-718.
[3]Bolaji Okogbe,Samuel Orimoloye,Olufemi Adewale,et al.Cased hole section milling and under reaming operation in converting oil well into a water disposal well[C]//SPE 167601,2013.
[4]陈玉书.新型双卡瓦高温高压尾管悬挂器的研制与应用[J].天然气工业,2010,30(8):48-50.
[5]张德荣,李德,孔春岩.新型侧钻坐封器设计及卡瓦有限元分析[J].石油矿场机械,2012,41(10):69-71.
[6]伍开松,谢斌,杨新克.封隔器卡瓦的三维接触有限元分析[J].石油矿场机械,2005,34(6):47-49.
[7]王志坚,邓卫东,林忠超,等.水平井封隔器卡瓦的有限元分析及结构改进[J].石油钻采工艺,2013(4):78-81.
[8]吴恩成.分瓣式卡瓦的力学理论分析与实验研究[D].大庆:大庆石油学院,2007.
[9]王迪,何世平,张熹.封隔器卡瓦接触应力研究[J].实验力学,2006(3):351-356.
[10]Persson B N J.Influence of frozen capillary waves on contact mechanics[J].Wear,2008,264(9):746-749.
[11]Bhushan Bharat,Israe Iachvili J N,Landman Uz I.Nanotribology:Friction,wear and lubrication at the atomic scale[J].Nature,1995,374(13):607-616.
[12]谢祖飞,余家欣,钱林茂.载荷对4种材料摩擦机制转变的影响[J].上海交通大学学报,2009,43(12):1930-1935.
[13]高仕赵,徐国宾.平面闸门行走支承滑动摩擦系数计算方法[J].天津大学学报,2014,47(5):383-388.
[14]周锡容,杨启明.摩擦磨损与润滑[M].北京:石油工业出版社,1997.
[15]张德荣,孔春岩,冯文荣,等.一种单卡瓦双作用非循环坐封导斜器悬挂工具:中国,201110355226.X[P].2017-06-08.
[16]温诗铸,黄平.摩擦学原理[M].北京:清华大学出版社,2008.
[17]Bowden F P,Moore A F W,Tabor D.The ploughing and adhesion of sliding metals[J].Journal of Applied Physics,1943,14(8):80-91.