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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Downhole video logging technique captures borehole images by downhole camera and can be applied to well casing inspection, downhole fishing, downhole completion quality inspection, etc.

井下视频成像测井利用井下摄像头获取井眼实时图像信息，可用于套管检测、落物打捞、井下作业质量检查等。

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In this paper, new method of measuring misplace of well casing using panoramic TV system is proposed.

本文提出了一种利用全景电视系统测量井管错位的新方法。

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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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