Calculating the Load on the Rod Suspension in Unsteady Oscillation Motion of the Well Pumping Unit Rods

2021 ◽  
pp. 3-10
Author(s):  
V.T. Mamedov ◽  
D.N. Aslanov ◽  
D.R. Damirova
Keyword(s):  
Dynamic Loading ◽  
Unsteady Motion ◽  
Entire Length ◽  
Initial Deformation ◽  
Suspension Point ◽  
Equal Distribution ◽  
Dynamic Forces ◽  
Pumping Unit ◽  
Polished Rod

The efficiency of a rod pumping unit is determined by the straightness of its rod string, which is impacted by the load when the rod string is in motion. Determining the dependence of the load impacting the rod suspension on the dynamic forces is one of the major issues in ensuring its straightness. In order to provide equal distribution of the stresses along the entire length of the polished rod under dynamic loading, it is necessary to determine the load on its surface, which is impossible without the equation of unsteady motion of the rod string. To this end, the article examines the issues related to the equation of unstable motion of well pumping unit rods. Formulae for calculating the loads acting on the rod suspension point are derived, and the equation of the rod string motion and load on the polished rod after the initial deformation is obtained.

Modeling of Dynamic Loads on the Polished Rod of Pumping Unit in Case of Mulfunction of Rod Pump Operating

2014 ◽  
Vol 10 ◽  
pp. 95-101
Author(s):  
A.S. Topolnikov
Keyword(s):  
Multiphase Flow ◽  
Satisfactory Agreement ◽  
Model Simulation ◽  
Theoretical Modeling ◽  
Dynamic Loads ◽  
Plunger Pump ◽  
Proposed Model ◽  
Pumping Unit ◽  
Polished Rod

The paper presents the results of theoretical modeling of joined movement of pump rods and plunger pump and multiphase flow in a well for determination of dynamic loads on the polished rod of pumping unit. The specificity of the proposed model is the possibility of taking into account for complications in rod pump operating, such as leakage in valve steam, presence of gas and emulsion, incorrect fitting of plunger inside the cylinder pump. The satisfactory agreement of results of the model simulation with filed measurements are obtained.

Dynamic Adjusting Mechanism of Counterbalance in Beam-Pumping Unit and its Kinetic Analysis

2013 ◽  
Vol 455 ◽  
pp. 274-278 ◽  
Author(s):  
Xiao Qing Kang ◽  
Tao Ren ◽  
Wen Tao Qu
Keyword(s):  
Kinetic Model ◽  
Kinetic Analysis ◽  
Transmission Mechanism ◽  
Power Cost ◽  
Data Comparison ◽  
Increase Productivity ◽  
Pumping Unit ◽  
Polished Rod

The purpose of conventional counterbalance mechanism featuring a fixed counterbalance torque is to balance the nonuniformity of polished rod load. Therefore, it cannot satisfy the demand of polish rod load which changes with well-condition and then leads to increase of power cost for decreasing quality of balance. This paper presents a new dynamic adjusting mechanism of counterbalance in beam-pumping unit that can adjust the counterbalance torque automatically without stopping the unit according to the new balance parameters derived by analyzing the variation of well-condition and increase productivity at the same time. A data comparison based on the corresponding kinetic model of transmission mechanism is also discussed.

Design Research on Working Mechanism of Beam Pumping Unit

2010 ◽  
Vol 37-38 ◽  
pp. 340-343 ◽  
Author(s):  
Jun Liu ◽  
Jiang Zhu
Keyword(s):  
Design Research ◽  
Simulated Annealing Algorithm ◽  
Optimal Solution ◽  
Working Mechanism ◽  
Type Curves ◽  
Boundary Constraints ◽  
Annealing Algorithm ◽  
Pumping Unit ◽  
Working Parameters ◽  
Polished Rod

Based on the unique geometry and mechanical movement of beam pumping unit, this paper presented a simple swing equation and computed motorial parameter, meanwhile under the conditions of the static load and inertial load of the polished-rod of a conventional pumping unit, it also presented an equivalent dynamic model of the pumping unit system and the type-curves of net torque of the crankshaft with the characteristic of inertial counterbalance having been computed, the model can provide a theoretical base for study on the other transient working parameters of beam pumping unit. Being satisfied with motion accuracy and boundary constraints, the optimization model of beam pumping unit is established. The simulated annealing algorithm with penalty strategy is adopted to solve the optimal model, so that optimization process was simplified and the global optimal solution is ensured reliably.

scholarly journals Research Concerning the Correlations Between Some Experimental Results in the Case of a Sucker Rod Pumping Installation

2018 ◽  
Vol 69 (11) ◽  
pp. 3060-3063
Author(s):  
Dorin Badoiu ◽  
Georgeta Toma
Keyword(s):  
Computer Program ◽  
Rotation Speed ◽  
Experimental Results ◽  
Programming Environment ◽  
Sucker Rod ◽  
Pumping Unit ◽  
Polished Rod

In the paper are analyzed the correlations between the experimental results obtained for the instantaneous rotation speed of the cranks shaft of a conventional sucker rod pumping installation and the speed and the acceleration at the end of the polished rod. The correlations have been established by analyzing the kinematics of the mechanism of the sucker rod pumping unit. The experimental records have been processed with the program Total Well Management. A computer program for performing the simulations has been developed by the authors using Maple programming environment.

scholarly journals VIBRATION PROCESSES AND THEIR RELATIONSHIP WITH DEFECTS

2021 ◽  
Vol 11 (07) ◽  
pp. 81-86
Author(s):  
Fariz Qafarov Fariz Qafarov ◽  
Elnarə Səlimova Elnarə Səlimova ◽  
Aybəniz Əmirova Aybəniz Əmirova
Keyword(s):  
Turnaround Time ◽  
Operating Conditions ◽  
Diagnostic Methods ◽  
Vibration Diagnostics ◽  
Operational Conditions ◽  
Dynamic Forces ◽  
Diagnostic Signs ◽  
Machine Parts ◽  
Pumping Unit ◽  
Pumping Units

ABSTRACT The article is devoted to vibration diagnostics, an effective method for assessing the parameters of the mechanical state of centrifugal pumping units. The use of vibration diagnostics allows, due to early detection of malfunctions, to improve target operation, increase the turnaround time and reduce the likelihood of emergency destruction of pumping unit elements. Diagnostic signs of the presence of defects in various elements of the pumping unit are presented. During the development of diagnostic methods, the character stages of the development of injuries are selected. These stages are the formation of the injury, the accumulation of injuries, collapse, and so on. consists of stages. Dynamic forces are considered to be the main cause of vibration in machine parts. It is under the influence of dynamic forces that fatigue breaks down in machine parts. The use of vibrodiagnostics in machine parts allows to accurately assess the degree of damage to its individual nodes. This, in turn, leads to improved operating conditions. In conclusion, it should be noted that vibrodiagnostics not only detects malfunctions in machines, but also reveals the causes of its formation. Keywords: vibrodiagnostics, improvement of operational conditions, determination of defects, probability of emergency destruction, repair, assessment.

Low-Dimensional Modeling of a Pumping Unit to Cope With Multiphase Flow

2017 ◽  
Vol 139 (4) ◽  
Author(s):  
Ala E. Omrani ◽  
Matthew A. Franchek ◽  
Behrouz Ebrahimi ◽  
Mete Mutlu ◽  
Karolos Grigoriadis
Keyword(s):  
Multiphase Flow ◽  
System Response ◽  
Two Phase ◽  
Pump Speed ◽  
Rod System ◽  
Sucker Rod ◽  
Pumping Unit ◽  
The Difference ◽  
Low Dimensional ◽  
Polished Rod

Pumping unit efficiency is highly disturbed by the presence of gas influx reducing the productivity and inducing unpredictable system response due to the change of its intrinsic properties such as the natural frequency. A poor estimation of those properties may affect the on-field crew and system safety as well as the production rate. The purpose of this paper is to construct a hydromechanical model describing the coupled multiphase flow-pumping unit system dynamics and to develop a procedure to control the pumping speed for safety assurance and oil production maximization. A coupled mechanical-multiphase flow model capturing the interplay between the gas void fraction (GVF) and the driving harmonic force of the pumping unit is developed. Specifically, the predicted downhole pressure is used to determine the sucker rod effective load. Consequently, a reduced-order model, capturing the dynamics of the sucker rod, is used to estimate the saddle bearings axial displacements which are function of polished rod loading. An error-driven adaptation using the difference between presumed bearing displacement with known GVF and the predicted bearing displacement from the proposed multiphysics model is employed to estimate the unknown downhole GVF. The obtained results prove that the adaptation allows an accurate evaluation of the pumped fluid's GVF, thereby circumventing the need for a costly and inaccurate measurement of the two-phase flow gas fraction. Based on this estimation, a control strategy is then proposed to regulate the pump speed while avoiding the resonance frequency of the sucker-rod system.

An Explicit Analysis Method for Walking-Beam Oil Pumping Unit

2010 ◽  
Vol 26-28 ◽  
pp. 1008-1012
Author(s):  
Xian Yue Gang ◽  
Cui Hua He ◽  
Shu Feng Wang ◽  
Yue Han
Keyword(s):  
Traditional Method ◽  
Trigonometric Functions ◽  
Analysis Method ◽  
Suspension Point ◽  
Power Conservation ◽  
Quadratic Equations ◽  
Complex Calculation ◽  
Explicit Analysis ◽  
Pumping Unit ◽  
Pumping Units

Based on the theory of linear transformation and vector operations, an explicit analysis method is proposed for walking-beam oil pumping unit, which overcomes the difficulties of traditional method: roots discriminating of quadratic equations method and angle quadrant discriminating trigonometric functions method. The kinematics and torque factor of suspension point, and the crank torque of the three kinds of walking-beam pumping units are calculated in a new way according to the rule of power conservation, which avoids the complex calculation of the force bore by each rod. The validity of this proposed method is illustrated with a numerical example.

Cloud Computation Processing for Oilfield Block Data and Chain Drive Pumping Unit Polished Rod Motion Model

2016 ◽  
Vol 89 (1) ◽  
pp. 41-50
Author(s):  
Haihui Zhao ◽  
Yaoguang Qi ◽  
Hongwei Du ◽  
Ningning Wang ◽  
Guofu Zhang ◽  
...  
Keyword(s):  
Motion Model ◽  
Chain Drive ◽  
Block Data ◽  
Pumping Unit ◽  
Cloud Computation ◽  
Polished Rod

scholarly journals Dynamic loading and response of footbridges

1988 ◽  
Vol 15 (1) ◽  
pp. 66-71 ◽  
Author(s):  
J. H. Rainer ◽  
G. Pernica ◽  
D. E. Allen
Keyword(s):  
Dynamic Loading ◽  
Dynamic Loads ◽  
Highway Bridge ◽  
Resonant Vibrations ◽  
Design Code ◽  
At Resonance ◽  
Dynamic Forces ◽  
Measured Response ◽  
Limited Duration ◽  
Good Agreement

Dynamic forces were measured during walking, running, and jumping, using an instrumented platform. The results are expressed as sinusoidal force amplitudes normalized by the subject's weight and are plotted versus frequency. The maximum dynamic loads for walking were found to be nearly twice as large as those recommended in the 1983 Ontario Highway Bridge Design Code or the British Standard BS5400, and those for running or jumping, more than six times as large.Responses of footbridges are calculated using a simple formula based on the dynamic loading due to one person, the response of a simple span at resonance, and limited duration of excitation. Good agreement was obtained with the measured response of two 17 m experimental spans subjected to human excitation, for both the first and second harmonics of the step rate. The resonant vibrations of the spans can be substantially reduced by resonant dampers. Key words: footbridges, dynamic loads, dynamic response, design criteria, resonant dampers.

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.

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