The LF refining process of oil casing steel at some steel work was investigated.
对国内某钢厂生产石油套管钢的LF精炼工艺进行了研究。
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.
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。
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