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

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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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Beschreibung
Zusammenfassung:	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 cylinder, a sliding cylinder and a setting piston. The inner side of the lower portion of the upper connector and the inner side of the upper portion of the central pipe are fixedly installed together. The inner side of the upper portion of the lower connector and the inner side of the lower portion of the central pipe are fixedly installed together. The outer side of the lower portion of the upper connector and the inner side of the upper portion of the fixed cylinder are fixedly installed together. The central pipe is sleeved with the portion, corresponding to the lower portion of the upper connector, of the fixed cylinder, and an overflow gap exists between the fixed cylinder and the central pipe. Overflow through