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。

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Through researching N80Q steel kind and the heat treatment technology, we have successfully developed and produced N80Q grade oil casing which meets the API standard and the user's requirement.

包钢通过对n 80 Q钢种和热处理工艺的研究，成功地开发生产了性能满足标准要求和用户需要的N80 Q钢级石油套管。

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The test adopts test piece as the same at oil field. The article analyzes the corrosion rate and the corrosion form of P110 casing steel in corrosion fluid in two temp situations.

试验采用与现场相同的腐蚀试件，具体分析了两种温度状态下P110套管钢在饱和盐水中的腐蚀速度和腐蚀形态。

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The other process, still in use, is to cut a window in an old well's steel casing and then drill horizontally into the oil zone.

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