Expansion tool capable of achieving butt joint and operation method of expansion tool

The invention provides an expansion tool capable of butt joint and an operation method thereof, the outer wall of the tail end of an oil pipe or a drill rod string is in threaded connection with the inner wall of the head end of a central pipe, a reducing section is formed on the outer wall of the u...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	WANG WEI, LIU CHUANGANG, DENG HAN, LIU PENG, WANG KUNJIAN, LIU YUFEI, LUO JIANWEI, JU SHAODONG, XING HONGXIAN
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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