Device for connecting tensile pressure -torsion changes

The utility model discloses a device for connecting tensile pressure -torsion changes, including the top connection, the lower extreme detachably of top connection is connected with the lower clutch,and the circumference equipartition has a plurality of half first grooves on the outer wall of lower...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	WANG QIANMIN, FANG MANZONG, BIAN XIAOLING, LI YANJUN, SUN BO
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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