Step-by-step releasable packer

The utility model relates to a stage by stage unsealing packer which is mainly used for ordinary mechanical release multi-stage water plugging pipe columns and is composed of an upper contact, an upper piston, an upper piston sleeve, an upper lock sleeve, an upper lock ring seat, a central pipe, a l...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	JIAMING,BIAN LI
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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