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Design and Analysis of Hydraulic Pumping Units

[+] Author Affiliations
Guixi Li, Rujian Ma, Jungang Wang

University of Jinan, Shandong, China

Paper No. IMECE2007-42798, pp. 55-58; 4 pages
doi:10.1115/IMECE2007-42798
From:
  • ASME 2007 International Mechanical Engineering Congress and Exposition
  • Volume 4: Design, Analysis, Control and Diagnosis of Fluid Power Systems
  • Seattle, Washington, USA, November 11–15, 2007
  • Conference Sponsors: ASME
  • ISBN: 0-7918-4298-3 | eISBN: 0-7918-3812-9
  • Copyright © 2007 by ASME

abstract

The dynamic performance of hydraulic beam pumping units was analyzed in this paper by using the theory of mechanical vibrations. The house-head movement of the pumping unit is mainly uniform, except the alternation period of upper- and down-strokes. Under the action of the house-head movement, the vibration of the system, the sucker-rod and, furthermore, the dynamic stress will be induced. The results indicate that the movement of the downhole pump includes two parts. One is the movement following the horse-head. The other is the dynamic response excited by the support movement. When the parameters of the system are selected reasonably, over-stroke of the pump will appear. This is because the movement of the hydraulic piston obeys a particular law. The maximum displacement increases, and the maximum dynamic stress decreases with depth. The changing of maximum dynamic stress with depth obeys quadratic law.

Copyright © 2007 by ASME

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