Leather cup structure

The utility model relates to a leather cup structure, include: a center tube for overlapping establish the cover intraductal, the part cover is established leather cup on the periphery wall of center tube, the periphery wall of leather cup with the structure has the annular space between the sheathe...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	LIU YANG, QIN JINLI, LI KUIWEI, HAN FENG, LI HONGCHUN
Format:	Patent
Sprache:	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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