Liquid-storage-type emptying-preventing oil well pump

A liquid-storage-type emptying-preventing oil well pump comprises a plunger assembly, a liquid storage cavity, a pump barrel, a fixed valve assembly and kerfs. The liquid-storage-type emptying-preventing oil well pump is characterized in that the outer periphery of the middle of the pump barrel is p...

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Bibliographische Detailangaben
Hauptverfasser:	ZHANG LUOQI, ZHANG XIMAO, WEI CHUNHONG, SUN QIFENG, XU XIAOHUA, XIA FANGLI, GAO SHENGLI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING HEATING LIGHTING MECHANICAL ENGINEERING POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS WEAPONS
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