Drilling auxiliary device for hole wall reinforcement and hole body straightening

The invention belongs to the technical field of cast-in-situ bored pile construction equipment, and particularly relates to a drilling auxiliary device for hole wall reinforcement and hole body straightening. The drilling auxiliary device comprises a central shaft, several reinforcing rings and a pl...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	GAO PEIPEI, HUANG LEI, ZHANG PAN, ZHENG HAO, WANG XIAODONG, TIAN GUOXUN, WU HUANHUAN, QIAN MENGDING, XU JIANGUO, DIAO MINGQUAN, CHEN YEGANG, SHEN JIANGCHAO, LI GANG
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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