Drainage hole forming construction method

The invention discloses a drain hole forming construction method. The method comprises the forming construction process of an auxiliary tool for drain hole forming construction on the basis that a construction frame body is not disassembled as a mounting and stress foundation. According to the auxil...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	YANG HONG, HUANG BIN, LU CHANGKUI, YAO YOUYI
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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