Expanding type sliding sleeve opening and closing tool

The invention relates to an expanding type sliding sleeve opening and closing tool for well completion sand prevention fracturing operation. The expanding type sliding sleeve opening and closing toolcomprises an upper mandrel, a cylinder sleeve, a first sealing ring, a second sealing ring, a piston,...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	LI BAOLONG, ZHANG BIN, ZUO KAI, QI HAITAO, BAO CHENYI, LIU QUANQUAN, KONG XUEYUN, WANG MINGJIE, YAN SHEN
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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