Modeling the design and performance of progressing cavity pump using 3-D vector approach

Nguyen, Tan; Al-Safran, Eissa; Saasen, Arild; Nes, Olav-Magnar

doi:10.1016/j.petrol.2014.07.009

Cited by 20 publications

(9 citation statements)

References 6 publications

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“…1. Nguyen et al (2014) discussed the development of the hypocycloid and modified hypocycloid equations in detail, but they did not consider twisting, eccentricity, rotation and clearance effects on their equations. The development of the hypocycloid equation proceeds as follows: In Fig.…”

Section: Pc Pump Geometry and Structured Grid Generationmentioning

confidence: 99%

“…The development of the hypocycloid equation proceeds as follows: In Fig. 2, the arc On the other hand, the modified hypocycloid equations were given by Nguyen et al (2014) as follows:…”

Section: Pc Pump Geometry and Structured Grid Generationmentioning

confidence: 99%

“…Numerical simulations for multiphase flow in PC pumps were also reported by de Azevedo et al (2016). Moreover, Nguyen et al (2014) used a vector approach and the hypocycloid theory to derive a modified hypocycloid curve which is capable of constructing the profile of the PC pump and predicting the flow area between the rotor and stator for any number of lobes. Nguyen et al (2016) developed a model for predicting an actual multi-lobe PCP performance.…”

Section: Introductionmentioning

confidence: 99%

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Viscous flow simulations through multi-lobe progressive cavity pumps

2020

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Computational fluid dynamics (CFD) simulations of multi-lobe progressive cavity (PC) pumps are limited in the literature due to the geometric complexity of the pump, which places numerous restrictions on the grid generation process. The present study attempts to alleviate such restrictions by developing a detailed numerical procedure for the numerical simulations of multi-lobe progressive cavity pumps. The profile equations for the multi-lobe configuration at any section at each instant of rotation are presented. A structured grid generation method is developed to generate mesh files required for CFD simulations of multi-lobe PC pumps. Results from the present procedure are validated against single-lobe PC pump numerical results available in the literature. Finally, a numerical parametric study is carried out to investigate the effect of the number of lobes, the stator pitch, the circular fillet and clearance on the volumetric efficiency of PC pumps with viscous oils.

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Section: Pc Pump Geometry and Structured Grid Generationmentioning

confidence: 99%

“…The development of the hypocycloid equation proceeds as follows: In Fig. 2, the arc On the other hand, the modified hypocycloid equations were given by Nguyen et al (2014) as follows:…”

Section: Pc Pump Geometry and Structured Grid Generationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Viscous flow simulations through multi-lobe progressive cavity pumps

2020

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“…Progressive cavity pumps (PCPs) are extensively used in a variety of applications including water and waste handling, deliquification of gas wells [1], oil production (in shallow oil wells) as well as the construction industry, given their ability to efficiently handle viscous liquids and solid materials (usually granular solids or mixtures of liquids and solids) while having relatively low surface profile compared to other positive displacement pumps used in similar applications. Due to their extensive use in gas and oil applications, progressive cavity pumps are thoroughly investigated in such applications, describing their function using analytical methods as performed by Nguyen et al [2] and Zhou et al [3] who performed three-dimensional analysis on progressive cavity pumps used in the gas and oil industry using semi-analytical models and Finite Element Analysis (FEA). Chen et al [4] investigated the correlation of the volumetric efficiency of PCPs with the pressure difference using FEA and fluid-structure interaction methods followed by experimental data, identifying two leakage mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Design of a new-concept conical positive displacement slurry pump for continuous de-clogging

et al. 2019

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Slurry pumps are extensively used in the construction industry while positive displacement screw pumps are used in most mobile concrete pump applications. The aggregate size is known to significantly affect pump performance in terms of clogging. Large aggregates tend to be trapped against the stator-rotor interface, blocking the continuous and smooth operation of the screw pump. In order to avoid the development of excessive stress values able to damage the rotor-stator mechanism of the pump, the typical de-clogging mechanism deployed by most positive displacement screw slurry pumps includes reversing the rotation of the pump driving motor thus allowing the aggregates to be carried away with the mixture, so that the pump can soon resume its operation. This procedure causes frequent start-stops of the pump resulting in dis-continuation of the pumped mixture lasting a few seconds, that while being of little importance in most construction applications, can be of significance in applications requiring higher levels of accuracy and continuous mixture flow. In the context of this work, a novel concept of positive displacement screw slurry pump is presented, including a continuous de-clogging mechanism, without the need to reverse the rotation of the driving motor. This de-clogging operation is achieved through the modification of the geometry of both the rotor and stator introducing a conical form along the axial direction. This configuration of the rotor-stator, allows for small displacements along the axial direction, which in turn increases the size of the cavities facilitating the de-clogging of the pump. Variable pitch is also introduced to both the rotor and stator in order to ensure constant mass flow of the mixture throughout the length of the screw pump covering for the velocity increase as a result of the conical geometry. The axial movement of the rotor in relation to the fixed stator, is achieved through the elastic support of the rotor in the axial direction, that allows for small axial displacements, when stresses induced from trapped aggregates exceed the stiffness of the support. The proposed concept comprises a passive real-time declogging mechanism that greatly reduces pump idle time compared to the conventional mechanism described earlier, providing smoother operation and stable mass flow of the mixture.

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“…However, it is remarkable that the slippage channel dimensions are only for the specific metallic stator PCP prototype in Gamboa's experiments, which cannot represent any other actual pumps with different structures. Nguyen et al [26] developed another analytical model to simulate the actual flow rate, based on their previous analytical model for the theoretical flow [27]. But the same computational problem of the slippage channels existed in the proposed model, in which they borrowed the slippage channel lengths from Pessoa et al [25].…”

Section: Introductionmentioning

confidence: 99%

Analytical Model for the Flow in Progressing Cavity Pump with the Metallic Stator and Rotor in Clearance Fit

Zheng

Han

et al. 2018

Mathematical Problems in Engineering

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As the metallic stator progressing cavity pump (PCP) operates with the stator and rotor in clearance fit, the slippage between cavities has a significant influence on the pump performance. In this paper, an analytical model is developed for the flow in the metallic stator PCP. Based on the analyses of the meshing movement and the clearance geometry inside the pump, the slippage through the transversal and longitudinal sealing regions is calculated considering different slippage mechanisms. Then the flow rate is obtained by subtracting the total slippage from the theoretical volumetric rate. This model is validated against results obtained from the performance experiments of commercial metallic stator PCP products from Shihong Petroleum Equipment Company. The model results show that the metallic stator PCP with smaller clearance or more stages is more capable of achieving good performance at high differential pressure. It is suitable for pumping the fluid with certain viscosity, and the influence of the slippage can be compensated by adopting appropriate high rotational speed. Furthermore, the model can be used to predict the pump performance and provide guidance for the pump design and performance optimization in field applications.

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Modeling the design and performance of progressing cavity pump using 3-D vector approach

Cited by 20 publications

References 6 publications

Viscous flow simulations through multi-lobe progressive cavity pumps

Viscous flow simulations through multi-lobe progressive cavity pumps

Design of a new-concept conical positive displacement slurry pump for continuous de-clogging

Analytical Model for the Flow in Progressing Cavity Pump with the Metallic Stator and Rotor in Clearance Fit

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