可膨胀异型管焊接技术研究
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摘要
膨胀波纹管是一种异型管,应用时会在水力压差作用下产生较大形变,因此焊缝应具有良好的力学性能。为了提高焊缝的性能,采用TIG焊打底,电弧焊或TIG焊盖面,单面焊接双面成形的焊接工艺,并制定了详细焊接工艺。为了满足现场平焊和仰焊的作业需求,研发了水平对管装置和垂直对管装置。为了避免焊缝缺陷对膨胀性能的影响,形成了X射线数字化成像缺陷检测技术,具有缺陷种类识别、位置提取和尺寸测量等功能,测量精度达到0. 01 mm。为了进一步验证焊缝的性能,对焊缝进行了拉伸和背弯的质量评定试验,试验结果均为合格。为了验证焊缝是否满足井下应用要求,通过有限元方法,模拟焊缝在井下的膨胀状态,模拟分析得出膨胀过程中焊缝处的受力小于焊缝强度。膨胀波纹管的焊缝在室内试验和现场应用中表现出优异的性能,现场应用4口井,成功率100%。
Expandable Profile Liner is a kind of special section tube which would have a large deformation with hydraulic differential pressure.The weld should have good mechanical properties because the tube string should remain sealed during expansion. In order to improve the performance of weld seam,a number of welding methods were adopted which include TIG bottom welding,arc welding or TIG consmetic welding,one-side welding with back formation and detailed welding process procedure. Horizontal and vertical alignment devices are manufactured for the workpiece on downhand and overhead welding position. For the purpose of avoiding the influence of weld defects on expansion performance,a digital X-ray imaging defect detection technology was used,which has the functions of defect type identification,location extraction and size measurement. The measurement accuracy is up to 0. 01 mm. The results of stretching and winding qualitative assessment are up to standard.The finite element method is used to simulate the expansion state of weld seam so as to verify whether the welding seam meets the requirements of application in wellbore. The simulation analysis shows that the stress is less than the strength of weld seam in expansion process. The weld seam shows excellent performance in laboratory test and field application. Four wells have been used in the field,and the success rate is100%.
Expandable Profile Liner is a kind of special section tube which would have a large deformation with hydraulic differential pressure.The weld should have good mechanical properties because the tube string should remain sealed during expansion. In order to improve the performance of weld seam,a number of welding methods were adopted which include TIG bottom welding,arc welding or TIG consmetic welding,one-side welding with back formation and detailed welding process procedure. Horizontal and vertical alignment devices are manufactured for the workpiece on downhand and overhead welding position. For the purpose of avoiding the influence of weld defects on expansion performance,a digital X-ray imaging defect detection technology was used,which has the functions of defect type identification,location extraction and size measurement. The measurement accuracy is up to 0. 01 mm. The results of stretching and winding qualitative assessment are up to standard.The finite element method is used to simulate the expansion state of weld seam so as to verify whether the welding seam meets the requirements of application in wellbore. The simulation analysis shows that the stress is less than the strength of weld seam in expansion process. The weld seam shows excellent performance in laboratory test and field application. Four wells have been used in the field,and the success rate is100%.
引文
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[2]陶兴华,朱宏武,王镇全,等.膨胀波纹管胀管器结构设计与试验[J].石油机械,2011,39(7):30-33.
[3]刘自刚,瞿怀宇,曹瑞昌,等. DP-TIG焊接方法工艺研究[J].焊接,2017(3):61-65.
[4]李敏.全位置自动管板氩弧焊机关键结构设计[J].焊接,2017(2):57-60.
[5]张文钺.焊接冶金学[M].北京:机械工业出版社,2009.
[6]陈丽,方凯龙,傅圣华.气孔和裂纹对焊接接头应力集中程度的影响[J].热加工工艺,2014,43(21):213-215.
[7]余国民,李军峰. X射线成像系统在焊管焊缝检测中的应用[J].焊管,2012,35(11):45-47.
[8] Giner E,Sukumar N,Tarancon J E,et al. Anabaqus implementation of the extended finite element[J]. Engineering Fracture Mechanics,2009,76(3):347-368.