复合连续管及其力学性能研究现状与发展

Current Status of Research on Composite Coiled Tubing and its Mechanical Properties

复合连续管是一种纤维增强复合管,与钢制连续管相比,它具有耐腐蚀和耐疲劳的优势,特别是在腐蚀性环境的井筒作业中替代钢制连续管作业具有良好的效果。国外从20世纪90年代开始研发复合连续管,国内近年来也在加快其研发进程,已研发出复合连续管并应用于油田井下工程。复合连续管力学性能的研究对指导生产实践具有重要意义。重点就纤维增强复合管的本构性能、热力学性能、疲劳性能以及工程载荷作用下力学性能的研究现状进行了综述和分析,旨在为今后复合连续管的研究和应用提供参考。最后指出复合连续管是在其他纤维增强材料铺设管道的基础上发展起来的,对其性能认识、研究和应用仍然处在发展时期。连续管的应用应该从载荷简单、作业形式单一的生产井管柱和简单修井、测井工程开始,在充分发挥复合材料管优势的同时加快其专业适应性的研究。

Composite coiled tubing is a fiber reinforced composite pipe.Compared with steel coiled tubing,it has the advantages of corrosion resistance and fatigue resistance,especially,it has a good effect in replacing steel coiled tubing in corrosive wellbore operations.Foreign countries began to develop composite coiled tubing in the 1990s;China has also accelerated its research and development process in recent years,and has developed composite coiled tubing and applied it in downhole engineering of oilfield.The research on the mechanical properties of composite coiled tubing is of great significance to guide the production practice.This article focuses on the review and analysis of the current research status of the fiber reinforced composite pipe,including its constitutive properties,thermodynamic properties,fatigue properties and mechanical properties under engineering load,aiming to provide references for the research and application of composite coiled tubing in the future.Moreover,it is pointed out that the composite coiled tubing is developed based on other fiber reinforced material laying pipelines,and the understanding,research and application on its performance are still in the development period.The application of coiled tubing should start from the production well string with simple load and single operation form as well as simple workover and well logging engineering,and accelerate the research on its professional adaptability while giving full play to the advantages of composite pipe.