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。
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。
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