scholarly journals Prediction and Analysis of Polished Rod Dynamometer Card in Sucker Rod Pumping System with Wear

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Dongyu Wang ◽  
Hongzhao Liu
Keyword(s):  
Initial Conditions ◽  
Abrasive Particle ◽  
Particle Diameter ◽  
Wear Volume ◽  
Wear Time ◽  
Pumping System ◽  
Sucker Rod ◽  
Dynamometer Card ◽  
Wear Law ◽  
Polished Rod

In the oil production process, the wear of friction pairs in sucker rod pumping installations will increase over time, which leads to the failure of the sucker rod pumping system. In order to study the effect of wear on the sucker rod pumping system, a wear model between the plunger and pump barrel was established. By analyzing the wear law, the wear volume and wear time of the pump barrel were calculated under abrasive wear. The forces of the sucker rod microunit were analyzed, and the wave equation of the sucker rod was established. Based on the given boundary and initial conditions, a mixed difference method was used to solve the equation. Taking the no. L2111 well of an oilfield as an example, the change curves of the wear volume and wear time with abrasive particle diameter were plotted, and the polished rod dynamometer card considering wear was predicted. The results showed that the increased clearance caused by wear will reduce the polished rod load on upstroke of the sucker rod pumping system, which could provide a theoretical basis for the next fault diagnosis.

A Novel Method for Diagnosis of Sucker-Rod Pumping Systems Based on the Polished-Rod Load Vibration in Vertical Wells

SPE Journal ◽  
2020 ◽  
Vol 25 (05) ◽  
pp. 2470-2481 ◽  
Author(s):  
JiaoJian Yin ◽  
Dong Sun ◽  
Yousheng Yang
Keyword(s):  
Analytic Solution ◽  
Vibration Signal ◽  
Operating Conditions ◽  
Vertical Wells ◽  
Sucker Rod ◽  
Impulse Load ◽  
Novel Method ◽  
Dynamometer Card ◽  
Polished Rod ◽  
The Relationship

Summary The pump dynamometer card is a direct reflection of the operating conditions of the downhole pump, which is important for the diagnosis of sucker-rod pumping systems. In this paper, we propose a novel diagnostic method based on the estimation of the parameters from the polished-rod load vibration signal of sucker-rod pumping systems in a vertical well. In this study, we deduce a new analytic solution of the 1D wave equation of the sucker-rod string, which can be used for the predictive and diagnostic analyses. The relationship between the polished-rod load vibration and the pump equivalent impulse load based on the analytic solution is studied, and the diagnostic parameter estimating method is proposed. Therefore, the pump dynamometer card calculated method based on the surface dynamometer card is realized. This study shows that the method is efficient.

Analysis on Failure Mechanism of Sucker Rod Pumping System

2014 ◽  
Vol 875-877 ◽  
pp. 1219-1224 ◽  
Author(s):  
Hua Liang ◽  
Xun Ming Li
Keyword(s):  
Influence Factors ◽  
Work Conditions ◽  
Water Pump ◽  
Fault Probability ◽  
Deep Well ◽  
Pumping System ◽  
Sucker Rod ◽  
Comprehensive Survey ◽  
Dynamometer Card ◽  
Pumping Equipment

There is the higher fault probability under the bad work conditions of the rod pumping system.According to the failure of the sucker rod pumping installation, a comprehensive survey is carried out. There is many influence factors of deep well pump working downhole, not only influenced by the machine, wells, pumping equipment, but also by sand, wax, gas, water. Pump conditions can be diagnosed by surface dynamometer card, surface dynamometer card is the first-hand information collected in pumping well of oilfields. By analyze the Characteristics of the different fault dynamometer, Lay the foundation for the further fault diagnosis and prediction. The different pattern of the different dynamometer is important.

scholarly journals Automatic Recognition of Sucker-Rod Pumping System Working Conditions Using Dynamometer Cards with Transfer Learning and SVM

Sensors ◽  
2020 ◽  
Vol 20 (19) ◽  
pp. 5659
Author(s):  
Haibo Cheng ◽  
Haibin Yu ◽  
Peng Zeng ◽  
Evgeny Osipov ◽  
Shichao Li ◽  
...  
Keyword(s):  
Fault Diagnosis ◽  
Transfer Learning ◽  
Working Conditions ◽  
Domain Knowledge ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Pumping System ◽  
Artificial Lift ◽  
Sucker Rod ◽  
Dynamometer Card

Sucker-rod pumping systems are the most widely applied artificial lift equipment in the oil and gas industry. Accurate and intelligent working condition recognition of pumping systems imposes major impacts on oilfield production benefits and efficiency. The shape of dynamometer card reflects the working conditions of sucker-rod pumping systems, and different conditions can be indicated by their typical card characteristics. In traditional identification methods, however, features are manually extracted based on specialist experience and domain knowledge. In this paper, an automatic fault diagnosis method is proposed to recognize the working conditions of sucker-rod pumping systems with massive dynamometer card data collected by sensors. Firstly, AlexNet-based transfer learning is adopted to automatically extract representative features from various dynamometer cards. Secondly, with the extracted features, error-correcting output codes model-based SVM is designed to identify the working conditions and improve the fault diagnosis accuracy and efficiency. The proposed AlexNet-SVM algorithm is validated against a real dataset from an oilfield. The results reveal that the proposed method reduces the need for human labor and improves the recognition accuracy.

Research of Rod Pump Load Reducing Technology on Deep Wells

2013 ◽  
Vol 772 ◽  
pp. 808-813 ◽  
Author(s):  
Xue Qi Cen ◽  
Xiao Dong Wu ◽  
Gang Lei ◽  
Shu Qin Ma
Keyword(s):  
High Load ◽  
Electric Motors ◽  
Pumping System ◽  
Deep Wells ◽  
Sucker Rod ◽  
Sucker Rod Pump ◽  
Pump Placement ◽  
Beam Pump ◽  
Polished Rod ◽  
Placement Depth

As the sucker-rod pump placement depth increases, the load at the polished rod rises as well. Meanwhile, high load at the polished rod limits further increase of pump placement depth. This paper mainly analyses polished rod load on pumping system units and describes several methods to reduce beam pump load that are used in deep wells. On the basis of theoretical analyzing of three load reducing technologies such as application of compound fiberglass sucker rods, linear electric motors and rod load reducer, it was determined that using compound fiberglass rods in real practical cases shows obviously higher efficiency than other two. linear electric motors technology has advantages of being used in deep wells as well. Moreover rod load reducer shows good performance in deep wells, but because it does not possess energy conservation characteristic it may be uneconomic and less effective during production.

A New Model to Evaluate Polished Rod Load of Sucker Rod Pumping System

2018 ◽  
Author(s):  
Yanbo Wang ◽  
Sai Wang ◽  
Lu Yang ◽  
Hui Pu ◽  
Kegang Ling
Keyword(s):  
New Model ◽  
Pumping System ◽  
Sucker Rod ◽  
Polished Rod

Identification for Sucker-Rod Pumping System’s Damping Coefficients Based on Chain Code Method of Pattern Recognition

2007 ◽  
Vol 129 (4) ◽  
pp. 434-440 ◽  
Author(s):  
Hongzhao Liu ◽  
Baixi Liu ◽  
Daning Yuan ◽  
Jianhua Rao
Keyword(s):  
Pattern Recognition ◽  
Euclidean Distance ◽  
Simulation Program ◽  
Similar Degree ◽  
Chain Code ◽  
Damping Coefficients ◽  
Pumping System ◽  
Sucker Rod ◽  
Dynamometer Card ◽  
Shape Characteristics

In this paper, a method for identifying the damping coefficients of a directional well sucker-rod pumping system is put forward by means of the chain code method of pattern recognition. The 24-directional chain code is provided to encode the dynamometer card curve. The parametric equation of the dynamometer card curve is transformed into Fourier series whose coefficients can be computed according to the curve’s chain codes. By means of these coefficients, shape characteristics of the curve are extracted. The Euclidean distance is introduced as the measurement of similar degree between the shape characteristics of measured dynamometer card and that of simulated dynamometer card. Changing the value of viscous damping coefficient and Coulomb friction coefficient in the simulation program, different simulated dynamometer cards are obtained. Substituting their shape characteristics to the Euclidean distance, respectively, a series of distances are acquired. When the distance is less than the given error, the corresponding values of the damping coefficients in the simulation program are regarded as real damping coefficients of the sucker-rod pumping system of directional well. In the end, an example is provided to show the correctness and effectiveness of the presented method.

Key Technologies of Sucker Rod Pump Card Diagnosis Based on BP Neural Network

2011 ◽  
Vol 201-203 ◽  
pp. 433-437
Author(s):  
Xiao Dong Wu ◽  
Rui Dong Zhao ◽  
Zhang Hao ◽  
Tao Zhen ◽  
Su Lei
Keyword(s):  
Neural Network ◽  
Bp Neural Network ◽  
Production Engineering ◽  
Pumping System ◽  
Artificial Lift ◽  
Sucker Rod ◽  
Key Technologies ◽  
Hidden Layer ◽  
Dynamometer Card ◽  
Selection Of

Sucker rod pumping is a dominated artificial lift method for oil production engineering. In the production process, diagnosing the condition of pump using dynamometer card is vitally significant to monitor and manage the pumping system. With the ability to reflect arbitrary non-linear mappings, the BP neural network can be used in pattern recognition of the pump dynamometer card. In this paper, some key technologies of establishing reasonable neural network are introduced. The number of neurons in input layer depends on the selection of characteristic value. The number of neurons in hidden layer can be obtained by some models, optimum value will be chosen out. The number of neurons in output layer depends on the recognized behavior of pump. After the construction of neural network, the more effective and practical BP neural network will be obtained by suitable samples and appropriate training strategies.

scholarly journals An energy-saving pumping system with novel springs energy storage devices: Design, modeling, and experiment

2017 ◽  
Vol 9 (1) ◽  
pp. 168781401668745 ◽  
Author(s):  
Hong jun Meng ◽  
Long Quan ◽  
Zhanlin Wang ◽  
Cheng wen Wang ◽  
Yuan Lan
Keyword(s):  
Energy Saving ◽  
Test System ◽  
Load Test ◽  
Energy Storage Devices ◽  
Pumping System ◽  
Light Load ◽  
Pumping Unit ◽  
Dynamometer Card ◽  
Polished Rod ◽  
The Impact

For the traditional reciprocating pumping unit, it generally starts at the bottom dead point with full load and is accelerated when starting and decelerated when stopping, which not only requires great energy from the motor but also impact on the output torque of motor. In order to tackle the above problems, we propose an energy-saving smooth reversing pumping system, which could store the energy in deceleration by making use of springs, and the stored energy could be reused in acceleration after reversion. This novel system targets to make the motor starting with light load, which could reduce the fluctuation in motor torque, decrease the starting time. In this article, a dynamic model and an efficiency model are established to compute the polished rod load dynamometer card and efficiency of the pumping unit. It is shown that the installed springs could help to reduce the impact on the system when reversing, and significantly decrease the energy consumption. In addition, we set up the real pumping system with load test system to verify the effectiveness of the model establishment. Through the experiment, the proposed pumping system could save energy up to 9.204% as compared to the traditional reciprocating pumping system.

Dynamic Analysis of the Sucker-Rod Pumping System of Deviated Well Based on LuGre Friction Model

2010 ◽  
Vol 139-141 ◽  
pp. 2346-2349 ◽  
Author(s):  
Bai Xi Liu ◽  
Hong Zhao Liu
Keyword(s):  
Elastic Deformation ◽  
Initial Conditions ◽  
Friction Model ◽  
Model Parameters ◽  
Pumping System ◽  
Lugre Friction Model ◽  
Sucker Rod ◽  
Nonlinear Dynamic Characteristic ◽  
Loads Analysis ◽  
Lugre Friction

Based on the LuGre friction model, the nonlinear dynamic characteristic of a sucker-rod pumping system of deviated well is simulated. Firstly, the LuGre friction model is introduced, and the values of its six model parameters, which satisfy the engineering’s needs, are obtained according to handbook and computation. Then, the vibration of the rod of sucker-rod pumping system is regarded as an axial vibration of multi-segment flexible rod. The loads analysis of rod element is accomplished by means of the finite element method, and recurrence formulas of load and elastic deformation are derived through the finite difference method. The boundary and initial conditions of the load and deformation are evaluated. In the end, a numerical example is given, where a comparison between the elastic deformation of pumping piston obtained based on LuGre friction model and that obtained based on classical Coulomb friction model is made to show that the LuGre friction model describe the friction of sucker-rod pumping system better.

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