热塑性复合柔性管力学模型与铺层角度研究  

Mechanical Model and Stacking Angle Research of Thermoplastic Composite Pipe

作　　者：葛鹏莉 夏和萍[3] 刘青山 时晨[3] 肖雯雯[1,2] 贾旭东 许艳艳 Ge Pengli;Xia Heping;Liu Qingshan;Shi Chen;Xiao Wenwen;Jia Xudong;Xu Yanyan(Key Laboratory for Enhanced Oil Recovery of Carbonate Fracture-vuggy Reservoir,SINOPEC;SINOPEC Northwest Oil Field Company;School of Petroleum Engineering,China University of Petroleum(Huadong))

机构地区：[1]中国石油化工集团公司碳酸盐岩缝洞型油藏提高采收率重点实验室 [2]中国石油化工股份有限公司西北油田分公司 [3]中国石油大学(华东)石油工程学院

出　　处：《石油机械》2022年第1期153-160,共8页China Petroleum Machinery

基　　金：塔河油气田硫处理与非金属材料研究与应用项目“连续玻纤带增强热塑性非金属管材接头研发与改进”(34400007-20-ZC0607-0084)。

摘　　要：热塑性复合材料柔性管(TCP)以其强度高、质量轻及耐腐蚀等优势逐渐成为传统钢制管道的替代品。TCP管的截面结构从内到外主要分为3层:内衬层、增强层和外保护层,通过热熔工艺粘合在一起形成完全粘结的实壁管道。研究了TCP管在多种载荷组合作用下的力学行为,建立了基于三维各向异性弹性理论的多层管结构的应力应变求解公式,并通过有限元仿真软件ABAQUS验证了理论公式的准确性。针对TCP作为井下连续管的应用工况,利用三维Tsai-Wu失效因子表征管道增强层各层的失效程度,对比了5组不同的铺层角度组合,研究了0°和90°铺层角度对管道承受较大拉伸载荷和内压载荷组合的影响。研究结果表明,增加0°铺层角度可以提高TCP管的轴向强度,同时减小面内剪切力,可以有效提高TCP连续管的承载性能。研究结果可为热塑性复合材料柔性管生产提供参考。Thermoplastic composite pipe(TCP) has gradually become a substitute for traditional steel pipeline due to its advantages such as high strength, light weight and corrosion resistance. The cross-section structure of TCP is mainly divided into 3 layers from the inside to the outside: the inner lining layer, the reinforcement layer and the outer protective layer, which are bonded together through the hot melting process to form a fully bonded solid wall pipe. In this paper, the mechanical behavior of TCP under various load combinations was studied, and the stress-strain solution formula of multi-layer pipe structure was established based on the 3 D anisotropic elasticity theory, and used the finite element simulation software ABAQUS to verify the accuracy of the theoretical formula. Aiming at the application condition of TCP as a coiled tubing, the 3 D Tsai-Wu failure factor was used to characterize the failure degree of each layer of pipeline reinforcement layer. Five groups of different layering Angle combinations were compared to study the influence of 0° and 90° stacking angle on the combination of large tensile load and internal pressure load. The research results show that the increase of 0° stacking angle can improve the axial strength of TCP and reduce the in-plane shear force, so it can effectively improve the load bearing capacity of TCP coiled tubing. The research results provide reference for the production of oil and gas pipelines.

关 键 词：复合材料柔性管 各向异性弹性理论 有限元分析 铺层角度 载荷组合 

分 类 号：TE973[石油与天然气工程—石油机械设备]