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。
The drilling process and techniques taken are described in detail in this paper.
详细介绍了施工过程及技术措施。
For a long time, perforation is Just regarded as the last simple process in drilling.
长期以来，射孔被认为是钻井工程的最后一道简单工序。
For a long time, perforation is Just regarded as the last simple process in drilling.
长期以来，射孔被认为是钻井工程的最后一道简单工序。
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