薄壁管材特殊螺纹接头密封性能研究  

Sealing Performance of Special Thread Joint of Thin⁃walled Pipe

作　　者：杨晓龙 汪强[1,2] 黄德全 晁利宁[1,2] 苑清英 李远征 麻文昌[2] YANG Xiaolong;WANG Qiang;HUANG Dequan;CHAO Lining;YUAN Qingying;LI Yuanzheng;MA Wenchang(Chinese National Engineering Research Center for Petroleum and Natural Gas Tubular Goods Co.,Ltd.,Xi'an 710018,China;CNPC Baoji Petroleum Steel Pipe Co.,Ltd.,Baoji 721008,Shaanxi,China;CNPC Baoji Petroleum Steel Pipe Co.,Ltd.,Ziyang Petroleum Steel Pipe Co.,Ltd.,Ziyang 641300,Sichuan,China)

机构地区：[1]中油国家石油天然气管材工程技术研究中心有限公司,西安710018 [2]中国石油宝鸡石油钢管有限责任公司,陕西宝鸡721008 [3]中国石油宝石钢管资阳石油钢管有限公司,四川资阳641300

出　　处：《焊管》2024年第5期47-52,共6页Welded Pipe and Tube

基　　金：陕西省重点研发项目“多段体积压裂井用高性能SEW管材及螺纹连接关键技术研究”(项目编号2023-YBGY-309)。

摘　　要：为了解决薄壁管材特殊螺纹接头在油田频繁出现高压泄漏的问题,采用有限元和实物试验相结合的方式,研究分析了薄壁管材特殊螺纹接头台肩厚度、螺纹过盈量和密封面结构等关键参数对接头密封性能的影响。结果表明,增大台肩厚度、降低螺纹过盈、设计锥/锥密封结构可大幅提高接头密封接触压力积分值,能够较好解决薄壁特殊螺纹油套管密封性能不足而导致的高压泄漏问题。根据该思路设计出常用规格的薄壁特殊螺纹套管,经实物试验验证,薄壁套管接头抗粘扣性能优异,密封性能达到了100%等管体,能够有效解决薄壁特殊螺纹接头上扣不稳定及高压漏失问题。In order to solve the of high pressure leakage of the special threaded joints for thin⁃walled pipes applied in oil fields,adopting a combination of finite element analysis and full⁃scale test to analyse the influence of key parameters such as shoulder thickness,thread interferenceand sealing surface structure on the sealing performance of special threaded joints in thin⁃walled pipes.The results show that by increasing shoulder thickness,reducing thread interference and designing cone/cone sealing structure,the integral value of contact pressure of joint seal can be greatly improved,and the problem of high pressure leakage caused by insufficient sealing performance of thin⁃walled special thread oil casing can be better solved.According to this idea,two kinds of thin⁃walled special thread casing with common specifications are designed.The full⁃scale test proves that the two kinds of thin⁃walled special thread joints have excellent anti⁃sticking properties,and the sealing performance reaches 100%equal pipe body,which can effectively solve the problems of unstable screw⁃on and high pressure leakage of thin⁃walled special thread joints.

关 键 词：薄壁套管 特殊螺纹 结构设计 密封性能 

分 类 号：TE931[石油与天然气工程—石油机械设备] TG62[金属学及工艺—金属切削加工及机床]