摘要
膨胀波纹管端头形状差异大,焊接时错边量较大,导致焊缝强度低,而采用常规整形工具整形存在工具被卡风险大的问题,为解决这一问题,研制了膨胀波纹管端头整形装置。该装置采用加热波纹管的方法提高管材韧性;内模具采用三瓣楔形结构,分解了整形作用力,降低了模具被卡的风险;通过分析整形过程中内模具的受力,优化了内模具的长度。室内和现场试验表明:采用膨胀波纹管端头整形装置对膨胀波纹管端头进行整形,整形精度较高,可将错边量由4~5mm减小至1mm以内,降低了整形作用力和模具被卡的风险,提高了焊缝的强度和管串的承压能力。研究表明,采用膨胀波纹管端头整形装置可以减小错边量,提高焊缝的质量和强度,降低整形工具被卡的风险。
The ends of expandable profile liners are characterized by significant differences in configurations. Unaligned butts during welding results in seam low strength. In order to improve the alignment of the ends and the stability of the weld seam,a restoration device for the expandable profile liner（EPL） has been developed. By optimizing the shaping temperature and reducing restoration force, the toughness of the EPL can be improved effectively. Through optimization of the length of the restoration section,it is possible to reduce the risk of getting stuck. An inner mold with three valves reduced the possibility of stuck risks by allocating stress. The geometric configuration of the inner mold was optimized through a stress distribution analysis. Experimental results and field application results showed that the device has the ad- vantages of high restoration precision, reduced restoration force, reduced friction and better anti-sticking. From the initial design,the alignment of butt weld can be reduced to less than 1 mm after the restoration from 4-5 mm before the restoration resulting in a greatly improved weld stability for the end restoration. The restoration device can improve the abilityand reliability of the EPL to pack complex formations.
出处
《石油钻探技术》
CAS
CSCD
北大核心
2017年第3期77-82,共6页
Petroleum Drilling Techniques
基金
中国石化科技攻关项目"塔河油田深部复杂层段侧钻技术研究"(编号:P12072)资助
关键词
膨胀波纹管
端头整形
焊接
有限元法
solid expandable profile liner
end restoration
welding
finite element method
