西南石油大学学报(自然科学版) ›› 1992, Vol. 14 ›› Issue (3): 76-81.DOI: 10.3863/j.issn.1000-2634.1992.03.011

• 石油机械工程 • Previous Articles     Next Articles

NO-BEAM PUMPING UNIT AND ITS PUMP EFFICIENCY

Lu Rui-dian
   

  1. (Department of Mechanical Engineering)
  • Received:1992-02-22 Revised:1900-01-01 Online:1992-08-20 Published:1992-08-20
  • Contact: Lu Rui-dian

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Abstract: There are many factors which affect the pump efficiency.Based on the
features such as long stroke and low speed of a no一beam pumping unit，this paper analyzes its pump efficiency.It is concluded that the pump efficiency of a no一beam pumping unit is higher than that of a beam pumping unit.

Key words: No-beam pumping unit Long stroke pumping unit

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