Compression type bidirectional pressure-bearing non-washable shaft packer

The invention relates to the technical field of packers and provides a compression type bidirectional pressure-bearing non-washable shaft packer. The compression type bidirectional pressure-bearing non-washable shaft packer comprises an upper connector, a central pipe, a lower connector, a fixed cyl...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ZHANG SHANGMING, XU EN, WU QINGXIANG, MAO TIANCONG, YUAN XUEZHONG, YANG JIAN, CHEN HAIPENG, ZHANG ZONGQIN, DONG GUANGYUN, ZHENG FANGXIA, JI PING
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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