A sleeve pipe ware for bad ground

The utility model provides a sleeve pipe ware for bad ground, includes sleeve pipe and conical head, sheathed tube upper portion is equipped with the sleeve pipe screw thread, and the lower part is equipped with the conical head draw -in groove, be equipped with the pinhole on sleeve pipe and the co...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	GUO XINLI, ZHU HONGWEI, ZHANG JINZHU, XIE JIUJING, WANG LUOFENG, GUO HONGSONG, DENG XIUYAN, LU XIAO, ZHANG CHENGTAO
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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