Polish rod double ball sealing device for pumping well

The utility model relates to a polish rod packing box and a polish rod sealing device which are arranged at an oil pumping well head. A novel polish rod sealing device with double balls for an oil pumping well adopts a double-ball structure, the double-seat functions of the polish rod packing box an...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SHUNGUANG JIN, TINGHENG ZHANG
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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Beschreibung
Zusammenfassung:	The utility model relates to a polish rod packing box and a polish rod sealing device which are arranged at an oil pumping well head. A novel polish rod sealing device with double balls for an oil pumping well adopts a double-ball structure, the double-seat functions of the polish rod packing box and the polish rod sealing device, and a movable stuffing box. The utility model has the characterized in that a polish rod can move in three-dimensional directions when the polish rod works, the eccentric friction between the polish rod and packing is overcome, and the packing can be replaced quickly and conveniently on site.