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  

Setting process numerical analysis of inserted tooth slip of sidetracking packer based on plough effect

作　　者：冯文荣[1] 孔春岩[2] 张德荣[2] 

机构地区：[1]西南石油大学应用技术学院,四川南充637000 [2]西南石油大学机电工程学院,四川成都610500

出　　处：《机械设计》2017年第6期55-59,共5页Journal of Machine Design

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.

关 键 词：犁沟效应 镶齿卡瓦 侧钻坐封器 坐封过程 数值分析 

分 类 号：TE921[石油与天然气工程—石油机械设备]