Long plunger oil well pump
The long plunger oil well pump comprises an outer sleeve, and a long plunger and a pump cylinder are sequentially arranged in the outer sleeve from top to bottom; the lower portion of the long plunger is connected with a center pipe, and the outer side of the center pipe is sequentially sleeved with...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The long plunger oil well pump comprises an outer sleeve, and a long plunger and a pump cylinder are sequentially arranged in the outer sleeve from top to bottom; the lower portion of the long plunger is connected with a center pipe, and the outer side of the center pipe is sequentially sleeved with an upper sliding block, a lower sliding block and a rubber sleeve ring from top to bottom. A limiting head is arranged at the lower end of the upper sliding block, a corresponding locking ring is arranged at the upper end of the lower sliding block, an outer step face corresponding to the limiting head is arranged on the outer side wall of the center pipe, an upper sliding block limiting groove is formed in the outer side wall of the upper sliding block, and a first elastic limiting body corresponding to the limiting groove is arranged on the inner side wall of the pump cylinder. According to the device disclosed by the invention, when the pump is stuck, sand can be quickly discharged, normal operation of a pumpin |
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