While-drilling device

The invention relates to the technical field of measurement while drilling equipment, and discloses a device while drilling, which solves the problem that an existing drill bit is easy to vibrate during working, and comprises a drill rod, a bottom column is fixedly mounted at the bottom of the drill...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ZOU ZONGBO, LIU SANXING, BI XINSHUAI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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