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文章在收集、查阅了大量国内外有关套管设计、套管失效形式、失效原因，可靠性分析等方面研究文献资料之后，结合我国石油天然气钻井生产实际和石油套管的研究现状，综合分析了国内外石油套管在设计、使用、维护等方面存在的问题；分析了套管的设计方法、套管的力学性能、使用环境等因素对套管工作寿命的影响及套管的主要失铲形式和失效原因。主国内外在套管设计及分析中应用可靠性技术的现状，为进一步开展套管可靠性研究提出的具体

PROGRESS IN CASING RELIABILITY STUDY

??In this paper,on the basis of gathering and consulting a lot of foreign and domestic literatures relating to the design,the form and reason of failure and the reliability analysis,etc.of casing and combining with the practice of the oil and gas drilling and the actual research situation of the casing in China,the existing problems in the design,use and maintenance of foreign and domestic casing at present are analyzed,the influence of the design method,mechanical property and surroundings of casing on casing's lifetime and its main form and reasons of the failure are analyzed and the actual situation in applying reliability technique in the design and analysis of foreign and domestic casing is expounded,putting forward the concrete research direction and measures for further casing reliability study.