Plunger assembly and oil well pump using same

The utility model discloses a plunger assembly and an oil well pump using the plunger assembly. A valve rod of the plunger assembly penetrates in a plunger in a vertically movable mode, a plunger section gap is formed between the peripheral face of the valve rod and the inner wall face of the plunge...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	LI PENG, YU TIEJING, SHE MEIQING, LIU KEWEI, MIAO YULI, YANG YUSHAN, LI JIANG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS HEATING LIGHTING MECHANICAL ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS WEAPONS
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Beschreibung
Zusammenfassung:	The utility model discloses a plunger assembly and an oil well pump using the plunger assembly. A valve rod of the plunger assembly penetrates in a plunger in a vertically movable mode, a plunger section gap is formed between the peripheral face of the valve rod and the inner wall face of the plunger, the lower end of the valve rod penetrates out of the plunger and is fixedly connected to a traveling valve ball, the traveling valve ball is located below the plunger, a valve ball section gap is formed between the traveling valve ball and the inner wall face of the pump cylinder, a guide plug fixedly connected with the lower end of the valve rod is arranged below the traveling valve ball, the peripheral face of the guide plug is in guide fit with the inner wall face of the pump cylinder in a vertically movable mode, an overflowing channel through vertically is formed in the guide plug, and the valve ball section gap and the lower side space of the pump cylinder are communicated through the overflowing channel.