在重点分析套管综合受力的基础上，结合现场经验，推导出了常规井注汽井口套升计算公式。
On the basis of casing bearer analysis and field experience, this paper gives casing elongation calculation formula of cold production Wells in the process of steam injection.
由此推导出了适合该厂生产实际的工程法经验计算公式。
An engineering method empirical formula applicableto actual production is also deduced.
推导出了计算钢管煤矸石砼偏心受压构件承载力的经验公式；
The experience formula to calculate the ultimate bearing capacity is obtained.
推导出了计算钢管煤矸石砼偏心受压构件承载力的经验公式；
The experience formula to calculate the ultimate bearing capacity is obtained.
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