Abstract
Aiming to solve the problems of long transmission chain, large movement inertia of components and high energy consumption of pumping units, this proposes a new pumping unit with direct balance and hydraulic drive. Through mathematical modeling and simulation analysis to compare the suspension dynamic characteristics and balance characteristics of the hydraulically driven pumping unit with the conventional one. It turns out that the suspension maximum speed drop 21.14%, the maximum acceleration drops 28.88% and the root mean square torque drops 92.9% on the suspension of the hydraulically driven pumping unit. The experimental results proves that the hydraulically driven pumping unit has significant energy saving efficiency, and achieves more than 30.9% of active power saving rate. Theoretical and practical research results show that hydraulically driven pumping unit is reliable and better energy saving, which provides a basis in theory and engineering practice in application.
Highlights
The conventional beam-pumping unit is durable and reliable
The results demonstrate that the hydraulic drive will have a better restraining effect on the dynamic load of the pumping unit suspension point
The indicator diagram of the hydraulically driven pumping unit is closer to the static indicator diagram, which is conducive to energy saving
Summary
The conventional beam-pumping unit is durable and reliable. due to its four-bar linkage structure, it has low system efficiency, high energy consumption and poor balance performance. Energy-saving mechanism research on beam-pumping unit driven by hydraulics been invented, providing theoretical and practical support for the sustainable development of oil fields. A new type of hydraulically driven direct-balanced pumping unit is proposed against the shortcomings of the beam pumping unit system, such as low transmission efficiency, complicated stroke adjustment and poor balance effect. The hydraulically driven beam-pumping unit can be produced or modified from the old one It has realized improving the efficiency of the pumping unit system, stepless adjustment of the stroke, and convenient balance adjustment; futhermore, it greatly reduces the amount of steel consumption of the pumping unit. The research results would be conducive to promoting the sustainable development of oil field
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