Sand-prevention oil-well pump

The utility model provides a sand-prevention oil-well pump. The oil-well pump is composed of a pump cylinder, an oil inlet valve, a plunger body and the like. The oil-well pump is characterized in that a sand-blocking ring is respectively arranged at the upper end of a plunger and the lower end of t...

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Bibliographic Details
Main Authors DENG BAONING, MA BO, SHU HUAWEN, GUAN PENG, ZHANG QINGSONG, LIU QINGMIN
Format Patent
LanguageChinese
English
Published 09.01.2013
Subjects
BLASTING
HEATING
LIGHTING
MECHANICAL ENGINEERING
POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS
PUMPS
PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
WEAPONS
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Summary:The utility model provides a sand-prevention oil-well pump. The oil-well pump is composed of a pump cylinder, an oil inlet valve, a plunger body and the like. The oil-well pump is characterized in that a sand-blocking ring is respectively arranged at the upper end of a plunger and the lower end of the plunger, and the upper water power of sand-blocking rings is communicated with the lower water power of sand-blocking rings by liquid through a sand filter screen and a communicating hole. Sand-blocking rings prevent sand grains from entering a sealing gap between the pump cylinder and the plunger, sand plugging can be prevented, sand grinding can be lightened, no differential pressure exist between upper ends of sand-blocking rings and lower ends of sand-blocking rings, the service life is long, and the sand-prevention oil-well pump is outstanding in performance, low in manufacturing cost and capable of being popularized and applied in a large scale conveniently.
Bibliography:Application Number: CN20122301015U