在油气井中，油层套管内压力变化是最普遍、最常见的一种现象。
It is a most popular and common occurrence that pressure changes in production casing.
在深井、超深井钻井过程中，套管磨损有可能导致套管封隔失效和油气井的早期报废。
In deep drilling process, casing wear is the problem that cannot be ignored.
在深井、超深井钻井过程中，套管磨损有可能导致套管封隔失效和油气井的早期报废。
In deep drilling process, casing wear is the problem that cannot be ignored.
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