Drilling tool system for preventing collapse of grouting hole

The utility model discloses a drilling tool system for preventing a grouting hole from collapsing, which comprises a drill rod, a built-in drill bit component connected with the drill rod, and a sleeve component sleeved on the drill rod and the built-in drill bit component, the built-in drill bit as...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	LIU BAOLIN, ZHU HAIYI, ZHU XIAOBING, CAO LINWEI, ZOU MINGBO, JIAO YIYANG, JIANG BO, KUANG WENTAO, LYU CHUANTIAN, LIU GUIYING, WANG HAIMING, XU BEN, LI ZHENGCHUAN, WANG WEISONG, GAO SHANCE
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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