双层组合套管固井技术 pipe-in-pipe casing string
计算过程还证实了双层组合套管的一些试验结果，对该种套管的特点有了进一步的认识。
Some of the testing results of the dual casing is verified by calculating using this method, and the characteristics of this type of casing is further identified.
利用注水泥装置实现局部井段双层组合套管注水泥工艺，达到增加套管抗外挤强度的效果。
Using cementing equipments, the dual casing cementing technology in local intervals has been achieved to meet the requirements of the improvements of casing collapse resistance.
对双层组合套管内填充液体介质进行了力学分析，导出了该介质压力传递系数的具体表达式。
A mechanical analysis on liquid medium filled in double-layer combined casing was conducted. An expressing equation of pressure transfer coefficient of the medium was deduced.
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