Analysis For Petroleum Casing Pipe And Drilling String Failure And Reliability Design Method Research

This dissertation mainly dealt with the Mechanism of Casing Failure. At the same time, the results of the new statistic were that the wells of casing failure were up to 17735 by the end of 2002, accounting for the 20 percentage of the whole China, it caused a loss of severe economy. There are many types of the casing failure and very complex casing failure.1 Many of related references were studied in the dissertation, some methods and ideas are to help our study, including a lots of the cases of using failure, it was to provide the decision-making for the study of which casing was failed.2 On the base of many researchers' literatures, the study of the dissertation mainly focused on the failure factors analysis is set up in three aspects, such as material, environment and corrosion. The influence of lacking strength of materials and screw thread are treated in this paper, as well as corrosion questions on complicated project situation. Especially, putting emphasis on the composite influence of the structure and stress, the abrasion factor to the pipe influence is analyzed in this paper.3 Use the reliability research method to analysis the factors of the pipe's failure, and supposes any kind of the calculate formulae under any cases.The research for similar roughly accumulated the project in the productivity and has its benefits.