Calculation of Operational Parameters

Takács, Gábor

doi:10.1016/b978-0-12-417204-3.00004-2

Cited by 2 publications

(3 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The finite difference method for tapered rod strings was proposed by Zhang et al [34], Takacs [13], and Yin [20].…”

Section: Finite Difference Methodsmentioning

confidence: 99%

“…Computer simulation of fault surface dynamometer cards is an economical and effective method. In this method, the card is simulated based on the solutions of the sucker-rod string wave equation with the description of the operation of the sucker-rod pump, which is called prediction technology [13]. Moreover, the behavior prediction of a sucker-rod pumping system is the theoretical basis for system design [14], energy consumption analysis [15], production parameter optimization [16], system control [4], and so on.…”

Section: Introductionmentioning

confidence: 99%

“…Chen et al [31] provided a unified expression for diagnostic and predictive analysis based on the analytical solution using complex theory and separation of variables, taking the displacement and force at any point of the sucker-rod string as known conditions. However, its boundary conditions are different from those in real predictive analyses [13,17]. Yin et al [20] proposed a matrix solution based on the analytical solution.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Hybrid Method for Solving the One-Dimensional Wave Equation of Tapered Sucker-Rod Strings

Yin,

2024

Axioms

View full text Add to dashboard Cite

Simulating surface conditions by solving the wave equation of a sucker-rod string is the theoretical basis of a sucker-rod pumping system. To overcome the shortcomings of the conventional finite difference method and analytical solution, this work describes a novel hybrid method that combines the analytical solution with the finite difference method. In this method, an analytical solution of the tapered rod wave equation with a recursive matrix form based on the Fourier series is proposed, a unified pumping condition model is established, a modified finite difference method is given, a hybrid strategy is established, and a convergence calculation method is proposed. Based on two different types of oil wells, the analytical solutions are verified by comparing different methods. The hybrid method is verified by using the finite difference method simulated data and measured oil data. The pumping speed sensitivity and convergence of the hybrid method are studied. The results show that the proposed analytical solution has high accuracy, with a maximum relative error relative to that of the classical finite difference method of 0.062%. The proposed hybrid method has a high simulation accuracy, with a maximum relative area error relative to that of the finite difference method of 0.09% and a maximum relative area error relative to measured data of 1.89%. Even at higher pumping speeds, the hybrid method still has accuracy. The hybrid method in this paper is convergent. The introduction of the finite difference method allows the hybrid method to more easily converge. The novelty of this work is that it combines the advantages of the finite difference method and the analytical solution, and it provides a convergence calculation method to provide guidance for its application. The hybrid method presented in this paper provides an alternative scheme for predicting the behavior of sucker-rod pumping systems and a new approach for solving wave equations with complex boundary conditions.

show abstract

“…The finite difference method for tapered rod strings was proposed by Zhang et al [34], Takacs [13], and Yin [20].…”

Section: Finite Difference Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Hybrid Method for Solving the One-Dimensional Wave Equation of Tapered Sucker-Rod Strings

Yin,

2024

Axioms

View full text Add to dashboard Cite

show abstract

Improved method on hydraulic power calculations for conventional sucker rod pumping system

Mwangupili

Bululu

Nyanswi

et al. 2020

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

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.

show abstract

Calculation of Operational Parameters

Cited by 2 publications

References 41 publications

A Hybrid Method for Solving the One-Dimensional Wave Equation of Tapered Sucker-Rod Strings

A Hybrid Method for Solving the One-Dimensional Wave Equation of Tapered Sucker-Rod Strings

Improved method on hydraulic power calculations for conventional sucker rod pumping system

Contact Info

Product

Resources

About