The external non liner loading of well casing can be improved by changing elastic parameters of the cement mantle.

水泥环的弹性参数和泥岩含水量等对套管外载有一定影响。

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Therefore, DGD may provide an alternative optimization method for deepwater well casing program design, which can produce remarkable economic and industrial values.

双梯度钻井为深水钻井井身结构设计提供了一种新的优化方法，具有显著的经济效益和工业实用价值。

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And considering the features and particular requirements of deepwater drilling, a program for deepwater DGD well casing program design and optimization is developed.

结合深水钻井的特点，考虑钻井施工的特殊要求，开发了深水双梯度钻井井身结构设计及优化程序。

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Cementing fills and seals the annulus between the well casing and the drilled hole.

FORBES: The Fracking Solution Is A Good Cement Job

The suspected cause of the incident, which occurred just before midnight Tuesday, is a cracked well casing.

FORBES: Chesapeake Energy Suffers Gas Well Blowout On Anniversary Of BP Spill

In working to expand mining of the cavern, the company made a cut in the well casing several hundred feet above its top, said Chustz.

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