Drilling free blind plate device

The utility model relates to a drill free blind board device, which is applied by a moveable well hanged slit liner bushing and belongs to the petroleum artesian well field. The utility model contains an upper connector(1), a blind board(2) and a lower connector(3); wherein the upper connector(1) is...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	JIANG HONG, BAI XINGDA, CHANG YONGDUO, FAN TIANCHAO, ZHAN NING, YU ZHANSHAN
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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