锥度设计对套管特殊螺纹接头密封性能影响  

Effect by Taper Design on Sealing Performance of Casing Premium Connection

作　　者：白鹤 张章 李超[2,3] 何石磊 苑清英[2,3] 鲁碧为 BAI He;ZHANG Zhang;LI Chao;HE Shilei;YUAN Qingying;LU Biwei(College of Mechatronics and Informatics,Baoji Vocational&Technical College,Baoji 721013,Shaanxi,China;Steel Pipe Research Institute of CNPC Baoji Petroleum Steel Pipe Co.,Ltd.,Baoji 721008,Shaanxi,China;National Petroleum and Gas Tubular Goods Engineering Technology Research Center,Baoji 721008,Shaanxi,China;Xi’an Bright Laser Technologies Co.,Ltd.,Xi’an 710072,China)

机构地区：[1]宝鸡职业技术学院机电信息学院,陕西宝鸡721013 [2]宝鸡石油钢管有限责任公司钢管研究院,陕西宝鸡721008 [3]国家石油天然气管材工程技术研究中心,陕西宝鸡721008 [4]西安铂力特增材技术股份有限公司,西安710072

出　　处：《焊管》2020年第5期8-11,16,共5页Welded Pipe and Tube

基　　金：陕西省职业技术教育学会2019年度职业教育研究课题“双一流背景下高职院校‘双师型’教师队伍建设的思考与探索”(项目编号SZJYB19-036)。

摘　　要：为进一步研究锥度设计对套管特殊螺纹接头密封性能的影响,利用ABAQUS有限元分析软件对不同锥度设计的套管特殊螺纹接头进行了上扣、拉伸、压缩条件下密封接触压力及接触长度的数值模拟。结果表明:内螺纹收尾处平切处理可有效提高密封面的接触压力和接触长度,扩大螺纹锥度的取值范围,但会减少全顶螺纹数量,平切深度越大,全顶螺纹数量越少,设计平切深度值时应全面考虑,避免影响接头连接强度;设计退刀槽可增加密封面接触压力和长度,但需注意其结构设计,避免造成配合螺纹的划伤或粘扣。In order to further study the influence of taper design on the sealing performance of the special thread joint of casing,ABAQUS finite element analysis software is used to simulate the sealing contact pressure and the contact length of the special thread joint of casing with different taper designs under the conditions of screwing on,stretching and compressing.The results show that the flat cutting at the end of the internal thread can effectively improve the contact pressure and contact length of the sealing surface,enlarge the value range of the thread taper,but reduce the number of full top threads.The larger the flat cutting depth is,the less the number of full top threads is.The design of the flat cutting depth should be fully considered to avoid affecting the joint connection strength.The design of the undercut can increase the contact pressure and length of the sealing surface,but it is necessary to avoid the scratch or sticking of the mating thread.

关 键 词：特殊螺纹接头 密封性能 锥度 套管 有限元分析 

分 类 号：TG142.7[一般工业技术—材料科学与工程]