High Precision Measurement Technology of Upward Drilling Depth in Coal Mine

In view of the problem that the existing measurement technology while drilling cannot solve the borehole depth measurement well, a high precision calculation method is proposed for the measurement depth while drilling of rotary drilling rig. This method uses the hydrostatic pressure at the borehole...

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Bibliographic Details

Published in:	Meikuang Anquan
Main Author:	ZHANG Jun, WANG Xinwen
Format:	Article
Language:	Chinese
Published:	Editorial Office of Safety in Coal Mines 2020-07-01
Subjects:	coal mine drilling construction upward drilling measurement while drilling borehole depth hydrostatic pressure
Online Access:	https://www.mkaqzz.com/cn/article/id/6928