Safety time calculation method for “Hang's Mudding-off” operation under circulation loss of returns

The so-called “Hang's Mudding-off” technique is critical to keeping the dynamic pressure balance and guaranteeing the sufficient safe operation time in wellbore. However, for lack of dynamic mathematical model analysis methods for reflecting the changes of annulus liquid level in the borehole d...

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Bibliographic Details
Main Authors: Huixin Liu, Dongchang Fan, Pu Liu
Format: Article
Language:English
Published: KeAi Communications Co., Ltd. 2016-11-01
Series:Natural Gas Industry B
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S2352854017300153