Improved method on hydraulic power calculations for conventional sucker rod pumping system
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Date
2020
Journal Title
Journal ISSN
Volume Title
Publisher
IOP Publishing
Abstract
The annual energy consumption of suck rod pumping units in China is more than 10
billion kWh, but the average efficiency is only about 25-31%. Limited information is known,
about the efficiency of various components of the pumping unit. The current methods for
calculating the hydraulic power neglect the effect of friction and free gas. This research
introduces an improved method for calculating hydraulic power which takes into account the
effect of friction and free gas. The model was obtained from the product of two parameters
which were, predicted pressure increased by the downhole pump and predicted flow rate. The
pressure increased by the pump was obtained by the nodal analysis approach in which the
concepts of multiphase flow were included. The Computer program was developed and all
calculations in this paper were computed by this program developed from python programming
language version 3.5. This model was compared with the previous models and showed that, the
previous models underestimated the hydraulic power since the influence of gas and friction
were not included.
Description
This journal is published by IOP in 2020