Small-diameter step-by-step unblocking and blocking water packer

The utility model belongs to the technical field of water plugging packers. The utility model relates to a packer, in particular to a small-diameter step-by-step unplugging water packer. The packer comprises an upper joint, a lower joint, a central pipe, a setting mechanism, an unsetting mechanism a...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	MENG XIANGPENG, JIA GUANGCAI, ZHENG LIHUA, SONG WENWEN, LU SHUTAO, MENG TONGYU, JIA GUANGSHENG, JIA JIGUANG
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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