防中途坐封封隔器设计毕业论文目录中文摘要英文摘要绪论..................................................................................................................................................................................................................................................................................................................................................................................................................................7总体方案与结构设计......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................32强度校核...................................................................................................................................................................................................................................................................................................38经济性分析...........................................39设计总结.............................................40参考文献.................................................41防中途坐封封隔器摘要为了使封隔器在油田能够得到进一步的广泛应用,在此主要针对常规封隔器在作业
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