Optimal Stress Calculations for Sucker Rod Pumping Systems

Pons, Victoria Mallory

doi:10.2118/171346-ms

Cited by 9 publications

(3 citation statements)

References 6 publications

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“…Many scientists have used the work of Gibbs as a basis for their research [27], who have reported valuable results. The standard solution method is the finite difference method [26], [28], [29], [30], [31], [32], [33], [34]. The here shown model uses the finite differences method to solve the viscous damped wave equation.…”

Section: Downhole Systemmentioning

confidence: 99%

Sucker rod pump frequency-elastic drive mode development – from the numerical model to the field test

Langbauer¹,

Langbauer²,

Frühwirth³

et al. 2021

Liq., gas. energy resour.

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A frequency-elastic drive mode for a sucker rod pumping system is introduced to reduce its polished rod peak loads and the total energy consumption. Numerical modeling and an extensive field test verify the concept. The frequency-elastic drive mode is a software solution for variable speed drive systems, which can be applied in the controller and does not require any hardware adjustments. The novel drive mode adjusts the set frequency, sent by the controller to the frequency converter, depending on the actual power requirements. An increase in power consumption results in a reduction of the set frequency, which is proportional to the power consumption increase. A reduction in power consumption results in the opposite effect to achieve a similar pumping speed as for regular operation. The frequency-elastic drive mode is simulated by a numerical model, which covers the entire pumping system. An extensive field test was performed to verify the concept and the numerical model. The simulation and the field test have confirmed the concept of the frequency-elastic drive mode and quantified its saving potential. The evaluation of the field test has shown that the energy-saving potential can reach five percent. In addition, a peak polished rod load reduction of up to three percent was seen. At the tested pumping system the frequency elastic drive mode under optimized parameters yields the best results in terms of total energy savings in the pumping speed range between 7 to 10 strokes per minute. A downhole system efficiency increase was seen for any pumping speed. The numerical model matches the field test data and allows the performance prediction of the novel drive mode for changed parameters and wellbore configurations without extensive field testing. The novelty of the presented paper is the concept of the frequency-elastic drive mode, which is a pure software solution for variable speed drive sucker rod pumping systems. The holistic model includes the entire pumping system and matches the field test data at remarkable accuracy.

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Section: Downhole Systemmentioning

confidence: 99%

Sucker rod pump frequency-elastic drive mode development – from the numerical model to the field test

Langbauer¹,

Langbauer²,

Frühwirth³

et al. 2021

Liq., gas. energy resour.

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“…The interaction forces between sucker rod string and tubing, F 1 , are within 1.5% of the rod weights based on the statistic data for the producing CBM wells. And the semi-dry friction forces between the plunger and pump barrel, F 2 , can be approximately determined by the formulae [24,25]. And the friction forces, F 3 , are caused by the rod string and well liquid during the downstroke period [26].…”

Section: Design Calculation Of Friction Loadingsmentioning

confidence: 99%

Dynamic Behavior of the Polished Rod for the Coalbed Methane Pumping Installations

Liu

Yang

2017

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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-A modern methodology has been proposed for the system design of dynamic behavior in order to provide the accurate pertinent analysis of CoalBed Methane (CBM) pumping installations. Dynamic hanging loads on polished rod can fully reflect the kinematic and dynamic characteristics of CBM pumping installations due to their combined action of the inertial hanging loads with the loads generated by vibration and hydrodynamic friction phenomena. The practical dynamometer cards were determined by computing dynamic hanging loads with the increments of stroke length. The interpretations of results show that the maximum errors of within 2% between the calculated and measured values are obtained with the comparison of calculated hanging loads by American Petroleum Institute (API), Schafer, Gibbs and proposed method. The ratios of inertial and vibration to polished-rod load are relatively high in producing CBM wells and calculated to be 10% and 8%, respectively. And the inertial and vibration hanging load ratios decrease rapidly for two-phase CBM wells. Moreover, the effect of friction loadings on polished rod is more obvious than that of inertial and vibration hanging loads for single-phase gas CBM wells. The total deformations of rod string and tubing are within 15% of polished-rod stroke length in producing CBM wells. And the dynamic loadings enhance the imbalance of hanging loads and improve the power consumption of CBM pumping installations. The total hanging loads on polished rod are variable in a large scale for the pumping prophase and single-phase water CBM wells and the variation range of dynamic hanging loads is much lower for the two-phase and single-phase gas CBM wells.

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“…Experimental and field analysis of sucker rod pumps have also been conducted to evaluate the importance of some factors on sucker rod performance and failure. Podio et al (2003) presented results for tests with a sucker rod pump model in the laboratory to provide information on dynamic and static pump friction measurement. They reasoned that one of the major costs during production is the lifting cost.…”

Section: Introductionmentioning

confidence: 99%

A comprehensive review of sucker rod pumps’ components, diagnostics, mathematical models, and common failures and mitigations

Fakher

Khlaifat

Hossain

et al. 2021

J Petrol Explor Prod Technol

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In many oil reservoirs worldwide, the downhole pressure does not have the ability to lift the produced fluids to the surface. In order to produce these fluids, pumps are used to artificially lift the fluids; this method is referred to as artificial lift. More than seventy percent of all currently producing oil wells are being produced by artificial lift methods. One of the most applied artificial lift methods is sucker rod pump. Sucker rod pumps are considered a well-established technology in the oil and gas industry and thus are easy to apply, very common worldwide, and low in capital and operational costs. Many advancements in technology have been applied to improve sucker rod pumps performance, applicability range, and diagnostics. With these advancements, it is important to be able to constantly provide an updated review and guide to the utilization of the sucker rod pumps. This research provides an updated comprehensive review of sucker rod pumps components, diagnostics methods, mathematical models, and common failures experienced in the field and how to prevent and mitigate these failures. Based on the review conducted, a new classification of all the methods that can fall under the sucker rod pump technology based on newly introduced sucker rod pump methods in the industry has been introduced. Several field cases studies from wells worldwide are also discussed in this research to highlight some of the main features of sucker rod pumps. Finally, the advantages and limitations of sucker rod pumps are mentioned based on the updated review. The findings of this study can help increase the understanding of the different sucker rod pumps and provide a holistic view of the beam rod pump and its properties and modeling.

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Optimal Stress Calculations for Sucker Rod Pumping Systems

Cited by 9 publications

References 6 publications

Sucker rod pump frequency-elastic drive mode development – from the numerical model to the field test

Sucker rod pump frequency-elastic drive mode development – from the numerical model to the field test

Dynamic Behavior of the Polished Rod for the Coalbed Methane Pumping Installations

A comprehensive review of sucker rod pumps’ components, diagnostics, mathematical models, and common failures and mitigations

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