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1
Panevnyk, D. O. "Investigation of the flow twist influence on the well jet pumps characteristic." Prospecting and Development of Oil and Gas Fields, no. 4(77) (December 28, 2020): 31–40. http://dx.doi.org/10.31471/1993-9973-2020-4(77)-31-40.
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The scope of downhole ejection systems is limited by the low value of the efficiency of the jet pump, the value of which usually does not exceed 35 %. Significant energy losses when mixing flows are the reason for the low efficiency of the jet pump. The energy performance of the downhole ejection system can be increased by creating swirling vortex circulating currents in the flow part of the jet pump. This optimizes the nature of the flow mixing and increases the energy performance of the jet pump. In the process of studying the structures, features of the working process and usage experience of ejection systems designed for drilling, operation and repair of oil and gas wells, it is established that the twisting of the working medium in downhole jet pumps can be carried out using guide elements placed at a certain angle in the oncoming flow and rotation of individual parts of the ejection system by means of an external drive and hydraulic turbines. The use of guide elements and hydraulic turbines necessitates the use of part of the energy of the working flow, which drives the downhole jet pump, to spin the working medium. In oil and gas ejection systems, the twisting of working, injected and mixed streams can be realized, as well as the combined simultaneous twisting of several streams. In the process of analyzing the experience of using vortex jet devices, it has been found that the flow twist allows to increase the injection coefficient of the jet pump by 38.1 %, efficiency – up to 70 %, vacuum in the receiving ch amber – up to 40 %. The increase in the basic geometric pa-rameter of the jet pump reduces the effect of flow twist on the characteristics of the ejection system. Flow twisting in downhole jet pumps can be recommended in the implementation of long-term processes, for example, in the ex-traction of formation fluid, when the value of the efficiency of the ejection system significantly affects the cost of oil production.
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Kryzhanivskyy, Ye I., and D. O. Panevnyk. "Optimization of design and mode parameters of the well ejection system." Oil and Gas Power Engineering, no. 1(33) (September 3, 2020): 73–80. http://dx.doi.org/10.31471/1993-9868-2020-1(33)-73-80.
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Insufficient energy performance of ejection equipment and a high probability of non-operating modes of its operation reduce the efficiency of downhole jet pumps. The method of determining the design and operating parameters of the well ejection system, which provide the maximum efficiency of the jet pump, is presented. The proposed algorithm for determining the optimal values of the geometric dimensions of the flowing part of the jet pump involves the construction of a series of pressure characteristics for different values of its geometric parameter, the calculation of the efficiency and the determination of the injection ratio and the relative pressure corresponding to its maximum values. During the studies, the main geometric parameter of the jet pump varied in the range from 2 to 6, given that these geometric dimensions are used in jet devices common in the oil industry. The optimal dimensions of the current part of the jet pump are obtained in the process of studying its pressure characteristics, and the optimal dimensions of the washing system of the bit - in the process of studying the characteristics of the hydraulic system. The design of an at-bit ejection system, which allows to increase the mechanical drilling speed, the passage of the bit, to stabilize the moment on the bit, to reduce its level of vibration and to control the antiaircraft angles of the well is considered. The efficiency of using at-bit jet pumps is in the following: an increase in the mechanical drilling speed up to 18.7%, the passage of the bit up to 50.8%. The research established the optimal diameters of the working nozzle, mixing chamber and bit nozzles, the distance between the working nozzle and the mixing chamber, the injection ratio and the relative pressure of the at-bit jet pump. The obtained values of design and mode parameters exclude the occurrence of cavitation modes of operation of the ejection system and allow the operation of jet pumps with maximum efficiency.
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Bazaluk, Oleg, Olha Dubei, Liubomyr Ropyak, Maksym Shovkoplias, Tetiana Pryhorovska, and Vasyl Lozynskyi. "Strategy of Compatible Use of Jet and Plunger Pump with Chrome Parts in Oil Well." Energies 15, no. 1 (2021): 83. http://dx.doi.org/10.3390/en15010083.
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During oil fields operation, gas is extracted along with oil. In this article it is suggested to use jet pumps for utilization of the associated oil gas, burning of which causes environmental degradation and poses a potential threat to the human body. In order to determine the possibility of simultaneous application of a sucker-rod pump, which is driven by a rocking machine, and a jet pump (ejector) in the oil well, it is necessary to estimate the distribution of pressure along the borehole from the bottomhole to the mouth for two cases: when the well is operated only be the sucker-rod pump and while additional installation of the oil-gas jet pump above its dynamic level. For this purpose, commonly known methods of Poettman-Carpenter and Baksendel were used. In addition, the equations of high-pressure and low-pressure oil-gas jet pumps were obtained for the case, when the working stream of the jet pump is a gas-oil production mixture and the injected stream is a gas from the annulus of the well. The values which are included in the resulting equations are interrelated and can only be found in a certain sequence. Therefore, a special methodology has been developed for the practical usage of these equations in order to calculate the working parameters of a jet pump based on the given independent working parameters of the oil well. Using this methodology, which was implemented in computer programs, many operating parameters were calculated both for the well and for the jet pump itself (pressures, densities of working, injected and mixed flows, flow velocities and other parameters in control sections). According to the results of calculations, graphs were built that indicate a number of regularities during the oil well operation with such a jet pump. The main result of the performed research is a recommendation list on the choice of the oil-gas jet pump location inside the selected oil well and generalization of the principles for choosing the perfect location of such ejectors for other wells. The novelty of the proposed study lays in a systematic approach to rod pump and our patented ejector pump operation in the oil and chrome plating of pump parts. The result of scientific research is a sound method of determining the rational location of the ejector in the oil well and the calculation of its geometry, which will provide a complete selection of petroleum gas released into the annulus of the oil well. To ensure reliable operation of jet and plunger pumps in oil wells, it is proposed to use reinforcement of parts (bushings, plungers, rods, etc.) by electrochemical chromium plating in a flowing electrolyte. This has significantly increased the wear resistance and corrosion resistance of the operational surfaces of these parts and, accordingly, the service life of the pumps. Such measures will contribute to oil production intensification from wells and improve the environmental condition of oil fields.
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Panevnyk, O. V. "THE RESEARCH OF PETROLEUM JET PUMP OUTLOOK." Prospecting and Development of Oil and Gas Fields, no. 1(70) (March 29, 2019): 41–51. http://dx.doi.org/10.31471/1993-9973-2019-1(70)-41-51.
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The development trends of hydraulic jet pumps used for the oil-fields exploitation are analyzed. The ambitionto optimize the process of mixing flows has led to the emergence of numerous designs of jet pumps, in which swirling flows are used instead of direct flows. The creation of circulation flows in the pump wet end promotes alignment of coaxial flows velocities, intensifies the process of energies exchange in the liquid, and increases the efficiency of the mixing process. The combination of direct and circulation flows gives a possibility to improve the technical characteristics of jet pumps up to 30%. The dimensions and the mutual orientation of the elements of the pump wet end have a decisive influence on the energy efficiency of the ejection technologies implementation. The optimization of dimensions and orientation of the components of the jet pump necessitates multifactorial experimental studies, which, in addition to the design factors, should also take into account the working mode of the ejection system in the well. The task of optimizing the design and mode parameters of a well ejection system can be solved by simulating the work process of the jet pump using modern software complexes Solid Works and ANSYS, which provide the necessary accuracy of the calculation operations. The efficiency of the ejection system also depends on the depth of its location in the well. Determining the optimum depth of installation of the ejection system in the well presupposes the use of iterative calculation methods with the aid of appropriate computer programmes (for example, Matchad). The development of the hydro-jet operation of oil wells is characterized by the tendency of a joint arrangement of the ejection system and traditional types of downhole pumping equipment. In the design of the combined oil-producing system the jet pump creates a low pressure zone in the bottom and intensifies the inflow ofhydrocarbons from the production horizon, while the traditional downhole pump transports them to the surface. The presence of an additional (jet) pump in the well optimizes the conditions of the main pump use. It improves the energy characteristics of the bottom-hole assembly and increases the efficiency of oil production. The analysis of the hybrid ejection technologies application indicates the prospects of this trend of oil and gas equipment.
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Biederstadt, K. C. "HYDRAULIC JET PUMPING AT TINTABURRA OILFIELD." APPEA Journal 28, no. 1 (1988): 19. http://dx.doi.org/10.1071/aj87002.
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The Hutton zone of the Tintaburra oilfield has an active bottom water drive which necessitates high gross fluid production rates to enable reserves to be produced within a reasonable period of time. A high volume artificial lift system capable of producing 8 000 to 10 000 barrels of fluid per day (BFPD) from 6 producing wells formed the basic design criteria, and hydraulic jet pumping was chosen as the means of artificial lift. The hydraulic jet pumping installation at Tintaburra was the first of its kind in Australia.The basic principle of operation of a jet pump is the transfer of momentum from a power fluid to reservoir fluid. The power fluid is pumped through a nozzle and the corresponding increase in velocity results in a pressure drop at the nozzle exit. This drop in pressure provides the drawdown necessary to move reservoir fluid to the pump where it is entrained and mixed with the power fluid. The combined stream is produced to surface and handled using convential production techniques. Equipment required in the Tintaburra system consists of a power fluid settling and storage tank, surface power fluid pump, distribution manifold, wellhead control valves and the subsurface assembly, including the jet pump itself.The application of mathematical equations describing jet pump operation was used in the initial selection of pumps for the Tintaburra wells. While this method provides insight into the operation of jet pumps, the use of equipment supplier's software proved to be more expedient in the final design stages and allowed many nozzle and throat combinations to be evaluated. Changes to well productivity brought about by the installation of down hole equipment required new pump selections for all wells. After nine months of operation, comprehensive production testing again highlighted changes to well productivity, necessitating variations in operating parameters or, in some cases, specification of new pumps.
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Melnikov, A. P., and N. A. Buglov. "Parameter substantiation of supra bit jet pump for productive formation opening." Earth sciences and subsoil use 44, no. 4 (2021): 433–40. http://dx.doi.org/10.21285/2686-9993-2021-44-4-433-440.
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The purpose of the study is to develop a supra bit jet pump taking into account the unsteadiness of low-speed drilling for crushing the cuttings injected from the annular space under productive formation opening. The article proposes a device for drill string bottom assembly intended for the initial opening of the productive formation. The device includes a supra bit jet pump and a colmatator. The jet pump creates an additional circulation loop of the drilling fluid above the well bottom, crushes the cuttings injected from the annular space in the mixing chamber and delivers it to the colmatator. An additional circulation loop above the well bottom creates a local drawdown of the formation while maintaining the hydrostatic pressure in the well. Crushing of cuttings in the mixing chamber of the jet pump occurs due to the creation of cross flows in the jet pump. The cross flows are provided due to the angular and eccentric displacement of the working nozzle of the jet pump relative to the mixing chamber. The colmatator creates an impermeable screen on the borehole wall for temporary isolation of the productive formation under initial opening. The conducted study allowed the authors to propose head characteristics of the jet pump taking into account the angular, eccentric displacement of the working nozzle. The head characteristic of the jet pump has been developed for the unsteady operation of the jet pump in the drill string bottom assembly. The head characteristics take into account the roughness of the flow path of the jet pump. Using the head characteristics, the permissible displacements of the working nozzle of the jet pump have been determined. Recommendations for the design of jet pumps for drill string bottom assemblies are proposed.
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Panevnyk, D. O. "Determination of the characteristics of a jet pump during its asymmetric rotation in a well." Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas, no. 2(51) (December 28, 2021): 55–65. http://dx.doi.org/10.31471/1993-9965-2021-2(51)-55-65.
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The hydraulic model of low-pressure jet pump working process for conditions of its asymmetric rotation is proposed on the basis of law of conservation of liquid momentum of parallel mixed potential flows with linear distribution of tangential velocities and radial displacement relative to borehole axis. In the process of derivation of the equation of pressure characteristic of low pressure jet pump at its asymmetrical rotation in a borehole the law of conservation of flow energy in the form of Bernoulli's equation and the law of continuity conservation of mixed currents have been used. To characterize uneven distribution of kinematic parameters in the mixing chamber of jet pump, the unevenness coefficient in the form of ratio of average and axial circumferential velocities of mixed flows is introduced. Flow rates of working, ejected and mixed streams are determined by integration of the adopted velocity profiles in the inlet and outlet sections of the mixing chamber of the jet pump. The developed hydraulic model allowed obtaining a dimensionless relative form of equation for determining the additional head of the jet pump caused by its asymmetric rotation in the borehole. The magnitude of the additional dynamic head increases as the peripheral velocity increases and the operating flow rate decreases. The total head produced by the jet pump is calculated by summing the additional head and the head obtained for the stationary ejector system. The rotation of the borehole ejection system causes the head and the efficiency of the jet pump to increase. The proposed hydraulic model can be used to improve the efficiency of jet pump mode prediction as a part of assemblies for drilling and bottomhole cleaning.
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., Zafarullah, Ubedullah Ansari, Habibullah ., Imtiaz Ahmed, and Muzamil Ahmed. "Developing Well Performance Analysis for Improving the pump capacity of Jet Pumps using SNAP software." International Journal of Current Engineering and Technology 11, no. 02 (2021): 168–72. http://dx.doi.org/10.14741/ijcet/v.11.2.4.
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Oil wells which are being produced having liquid in it having reservoir pressure, those wells have energy through which liquids are being pushed to lower pressure areas. Artificial lift methods defined as to application of artificial method through which flow of crude oil production can be increased or improved from production well. In general, this could be done through a mechanical device that are used inside the well like pump or velocity string, this method is working through decreasing the weight of the hydrostatic column with injecting gas into the liquid phase distance down the well. To develop a troubleshooting model of pumping capacity of jet pump to achieve optimized flow rate using well performance nodal software (SNAP). To abridge the pump selection technique by conducting sensitivity analysis over nozzle and throat size. In this studies SNAP Software is used to select proper nozzle and throat for jet pump in various conditions, to avoid the problems. Through SNAP can analyze relationships between the reservoir, wellbore, and surface equipment to determine a wells’ production capacities. After that in this study troubleshooting for jet pump will also be discussed, in which most common problem of jet pump occurred during operation and installation will be indicated. Proper specific gravity ratio of reservoir fluid and power fluid can optimize high efficiency of jet pump. It is also observed that viscosity ratio of reservoir fluid to the power fluid can reduce the quantity of light oil in power fluid. (again economical). It is better to select nozzle and throat size through computer software because software gives accurate result then human 8 also gives good recommendation for selecting best nozzle and throat size for given conditions. It is better to simulate first then apply.
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Melnikov, A. P., and V. V. Shaidakov. "Development of a supra-bit jet pump for opening a productive formation." IOP Conference Series: Earth and Environmental Science 981, no. 3 (2022): 032054. http://dx.doi.org/10.1088/1755-1315/981/3/032054.
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Abstract The article proposes a jet pump for the bottom hole assembly. The developed supra-bit jet pump provides an additional circulation loop of the drilling fluid above the bottom of the well, which creates a local depression of the formation. In addition, the jet pump grinds the sludge injected from the annular space in the mixing chamber and feeds it to the bridging machine, which is included in the assembly, for temporary isolation of the productive formation. Isolation of the productive formation is necessary to prevent the flow of formation fluids into the wellbore when underbalanced. Grinding of the sludge in the jet pump is ensured by the cross flows of the working and injected liquid, which occur during the angular and eccentric displacement of the working nozzle of the jet pump relative to the mixing chamber. The angular and eccentric displacements of the working nozzle, the roughness of the flowing part of the mixing chamber and the diffuser, at which the pressure losses in the jet pump are insignificant, have been determined. Recommendations are proposed for increasing the efficiency of the jet pump in case of non-stationary operation at the bottom of the well, which occurs as a result of ground vibrations of a roller cone bit and uneven supply of working fluid by mud pumps.
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Dubei, O. Ya. "The Influence of the Jet Pump Geometry on its Main Technological Parameters." Prospecting and Development of Oil and Gas Fields, no. 4(73) (December 30, 2019): 24–34. http://dx.doi.org/10.31471/1993-9973-2019-4(73)-24-34.
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In order to test the operational efficiency of jet pumps which are installed at different depths in artificial lift-ed oil wells, it is necessary to establish the relation between their geometry and the maximum achievable operat-ing parameters. For this purpose, a series of experimental laboratory studies is conducted. Their main task is to identify the optimal parameters of a jet pump that works with gas-liquid flows. In the experimental setup, the fluid is supplied by an electric centrifugal pump and the air is injected by a compressor. The setup provides the possibility to regulate the fluid pressure before and after the jet pump, as well as the pressure and gas supply at its inlet. The basic parameters of the setup are calculated according to the criteria of the resemblance to real wells. The influ-ence of the jet pump geometry on its working parameters is estimated by replacing its main elements (nozzle, mix-ing chamber, diffuser). For each of the suggested designs of the jet pump, the pressure and the flow rates in its main cross-sections are measured and their measurement values are compared. On the basis of this comparison the author finds the main regularities for choosing optimal geometry which provides maximum gas offtaking or minimum pressure losses. The basic results of the experimental study are presented in the form of graphical dependencies which allow to make conclusions about the operational efficiency of jet pumps.
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Panevnyk, Oleksandr, and Denys Panevnyk. "DETERMINATION OF THE WELL JET PUMP OPERATION MODE." Young Scientist 1, no. 65 (2019): 193–96. http://dx.doi.org/10.32839/2304-5809/2019-1-65-43.
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Panevnyk, O. "THE CHOICE GROUND OF DOWNHOLE STREAM PUMP GEOMETRICAL SIZES." Prospecting and Development of Oil and Gas Fields, no. 4(69) (November 9, 2018): 70–76. http://dx.doi.org/10.31471/1993-9973-2018-4(69)-70-76.
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The method of choosing geometric parameters of the well hole pump which ensures its operation in the mode of maximum efficiency is proposed. According to the algorithm developed, the ratio of the diameters of the working nozzle, the mixing chamber and the diffuser of the jet pump, as well as the distance between the nozzle and the speed equalization chamber and the axial dimensions of the flow part elements are regulated.
 During the process of establishing the required dimensions of the elements of the ejection system, the nature of the free working jet into the mixing chamber of the jet pump is taken into account, which determines the shape and structure of the estimated ratios governing the axial distance between the working nozzle and the resuscitation chamber of the mixing streams. The relationship between the mixing chamber diameters and the working nozzle and the amount of the jet pump coefficient of ejection which ensures its operation with the maximum possible values of the ejection system efficiency is shown. The analytical nature of the establishment of hydraulic interconnections among the elements of the ejection system is complemented by the experience of the practical use of deep jet pumps in the implementation of certain technological processes of construction, operation and repair of oil wells.
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Panevnyk, D. O., та O. V. Panevnyk. "Сontrol and Regulation of the Hydraulic Jet Pump Operation Mode". Prospecting and Development of Oil and Gas Fields, № 1(74) (30 березня 2020): 18–25. http://dx.doi.org/10.31471/1993-9973-2020-1(74)-18-25.
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Permanent monitoring and remote control of the operation mode of the hydraulic jet pump allows increasing the efficiency of the hydrajet mode of oil wells operation. Based on the analysis of the workflow of the ejection system, the authors reveal the relation between the density and flow rate of the mixed flow and the operating parameters of the oil hydraulic jet pump in the form of nonlinear dependencies, which make it possible to carry out remote control over the flow rate in the bottomhole circulation circuit. In the process of modeling the hydraulic relations between the elements of the ejection system, a binary diagram is constructed. This binary diagram is created in the form of two combined quadrants and presents the obtained regularities between the parameters of the mixed flow at the well outlet and the operation mode of the jet pump. The authors present the method of remote control over the operation mode of a well ejection system by means of varying the flow-rate of power fluid directed to the well by a ground pump unit and by means of changing the dimensions of the components of the flowing part of the jet pump. The regulation of the operation mode of the hydraulic jet pump occurs by changing the position of the operating point of the pumping unit. In the process of regulating the operation mode of the jet pump by changing the operating flow rate, the authors obtain a series of characteristics of the hydraulic system which determine the coordinates of the operating point of the pumping unit. Adjusting the operation mode of the ejection system by changing the dimensions of the components of the flowing part of the jet pump involves creating a series of its own characteristics with constant characteristics of its hydraulic system. The replacement of the components of the flowing part of the jet pump is carried out in a hydraulic way and does not require round-trip operations in the well. The authors present the graphical interpretation of the proposed methods of regulating the operation mode of the well ejection system in the form of combined characteristics of the jet pump and its hydraulic system built in the single system of coordinates.
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Fujita, Isamu, Muneo Yoshie, and Yukihiro Saito. "Steam Jet Pump For Oil Recovery And Reformation." International Oil Spill Conference Proceedings 2005, no. 1 (2005): 589–93. http://dx.doi.org/10.7901/2169-3358-2005-1-589.
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ABSTRACT This paper discusses basic performances of the steam jet suction device and its potential application to the spilled oil recovery. The experiments were carried out on suction and ejection performance of the steam-driven jet pump as well as its other benefits such as breaking emulsion or an application to a beach cleaning device. The paper additionally includes some basic topics related to the process of emulsion breaking by surface active agents. The main conclusions of the study are (1) A steam-jet pump is basically suitable to recover and transfer high viscosity spilled oil because it realizes large suction power as well as very rapid heating which resolves the difficulty related to the high viscosity caused by the emulsification, (2) A steam-jet pump is also available for reforming the nature of the spilled oil. Emulsion breaking was observed to a considerable extent even without chemical agent, (3) A steam-jet pump has a potential application to a beach cleaning equipment. The steam-driven jet pump is available for sucking well not only liquid but also sand slurry and simultaneously has some side effect that separates oil from oiled-sand very rapidly. The steam-driven jet pump will play an important roll to respond to the high viscous emulsified oil pollution.
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Toteff, Jens, Miguel Asuaje, and Ricardo Noguera. "New Design and Optimization of a Jet Pump to Boost Heavy Oil Production." Computation 10, no. 1 (2022): 11. http://dx.doi.org/10.3390/computation10010011.
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In the Oil and Gas industry, installing pipe loops is a well-known hydraulic practice to increase oil pipeline capacities. Nevertheless, pipe loops could promote an unfavorable phenomenon known as fouling. That means that in a heavy oil-water mixture gathering system with low flow velocities, an oil-water stratified flow pattern will appear. In consequence, due to high viscosity, the oil stick on the pipe, causing a reduction of the effective diameter, reducing handled fluids production, and increasing energy consumption. As jet pumps increase total handled flow, increase the fluid velocities, and promote the homogenous mixture of oil and water, this type of pump could result attractive compared to other multiphase pump systems in reactivating heavy crude oil transport lines. Jet pumps are highly reliable, robust equipment with modest maintenance, ideal for many applications, mainly in the oil and gas industry. Nevertheless, their design method and performance analysis are rarely known in the literature and keep a high experimental component similar to most pumping equipment. This paper proposes a numerical study and the optimization of a booster multiphase jet pump system installed in a heavy oil conventional loop of a gathering system. First, the optimization of a traditionally designed jet pump, combining CFD simulation and optimization algorithms using commercials software (ANSYS CFX® and PIPEIT® tool), has been carried out. This method allowed evaluating the effect of multiple geometrical and operational variables that influence the global performance of the pump to run more than 400 geometries automatically in a reduced time frame. The optimized pump offers a substantial improvement over the original concerning total flow capacity (+17%), energy, and flow distribution. Then, the effect of the three jet pump plugin configurations in a heavy oil conventional trunkline loop was analyzed. Simulations were carried out for different driving fluid pressures and compared against a traditional pipeline loop’s performance. Optimum plugin connection increases fluid production by 30%. Finally, a new eccentric jet pump geometry has been proposed to improve exit velocities and pressure fields. This eccentric jet pump with the best connection was analyzed over the same conditions as the concentric optimized one. An improvement of 2% on handled fluid was achieved consistently with the observed uniform velocity field at the exit of the pump. A better total fluid distribution between the main and the loop line is obtained, handling around half of the complete fluid each.
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Zhu, Duan Yin, and Jian Ning Xu. "Research on Numerical Simulation of Jet Pump Design System Parameters Matching in the Oilfield." Applied Mechanics and Materials 248 (December 2012): 124–28. http://dx.doi.org/10.4028/www.scientific.net/amm.248.124.
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Jet pump has different basic characteristics when it is used in different application condition. According to jet pump structural design matching technological parameter used in the oilfield unloading system, research on four kinds of numerical simulation algorithms. They are work characteristics of ground power pump model, target liquid production model, current pressure model and pump setting depth model. The results show that the four models can meet the needs of structural design and technological parameter calculation in different conditions. This paper form system theory, provide for pump design and selection matching for jet pump unloading system used in well.
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Wang, Chun Lin, Chun Lei Zhao, Tian Fang Zhang, and Dong Liu. "The Numerical Simulation of Full Flow Field of Roto-Jet Pump and Analysis of Energy Losses." Advanced Materials Research 562-564 (August 2012): 1369–72. http://dx.doi.org/10.4028/www.scientific.net/amr.562-564.1369.
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The structure and working principle are introduced in the paper. Based on the physical model of key parts to roto-jet pump which is set up in Gambit, the 3-D steady flows numerical simulation has been implemented by means of Fluent under design operating conditions. This method could avoid the error in simulating single part of the pump. The result shows the interflow distribution of the pump, the difference effect is very well after installing short blades on impeller. the shape of collecting pipe has little impact on the pressure within rotor cavity and the vertex band is apt to form in the corner of the collecting pipe inlet. By analyzing the energy losses between two different installed types of roto-jet pump. The result shows that the energy loss of rotor cavity in right-closed impeller pump is more than in the left-open impeller pump, but the effect of impeller pressurization in left-open impeller pump is not well, the energy loss caused by collecting pipe is almost the same in the two different pumps. The analyzing results can provide some proposals for structure reforming, performance and efficiency improving.
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Drozdov, A. N., D. O. Vykhodtsev, K. A. Goridko, and V. S. Verbitsky. "Express method of jet pump characteristics calculation for well operation." Neftyanoe khozyaystvo - Oil Industry, no. 2 (2018): 76–79. http://dx.doi.org/10.24887/0028-2448-2018-2-76-79.
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Lyamasov, A. A., B. M. Orahelashvili, and A. M. Gribkov. "Numerical Simulation of Double Surface Liquid Ejector with Flow Swirl for Centrifugal Pump." E3S Web of Conferences 320 (2021): 04003. http://dx.doi.org/10.1051/e3sconf/202132004003.
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Many systems with liquid ejectors and centrifugal pump are known. Often, jet pumps are used to provide a self-priming mode, as well as an acceptable pressure level for cavitation-free operation. The main disadvantage of such systems is the relatively low efficiency associated with the peculiarities of energy transfer in ejector. To increase efficiency double surface jet pump with driving and suction flow swirl (with circumferential component of velocity) is proposed. The active flow swirling is ensured by using of multi-nozzle tangential nozzle inlet and passive flow part by a special blade system. Combination of these factors makes it possible to improve the efficiency of energy conversion process. In comparison with the known design increases pump efficiency by 10 % – 15 %. Flow swirl also permits to reduce horizontal overall size by increasing the diffuser angle and reducing the mixing chamber length. These positive effects can be achieved by using methods and recommendations given in this paper. The paper also includes ANSYS CFX numerical simulation study results of double surface jet pump and analysis of the impact of nozzle position, length of the mixing chamber and other geometry parameters on pump performance. The results allow optimize the constructive solutions.
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Yaeger, Kurt, Annabelle Iserson, Paul Singh, et al. "A technical comparison of thrombectomy vacuum aspiration systems." Journal of NeuroInterventional Surgery 12, no. 1 (2019): 72–76. http://dx.doi.org/10.1136/neurintsurg-2019-014929.
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IntroductionImproved functional outcomes after mechanical thrombectomy for emergent large vessel occlusion depend on expedient reperfusion after clinical presentation. Device technology has improved substantially over the years, and several commercial options exist for both large-bore aspiration catheters and suction pump systems.ObjectiveTo compare various vacuum pumps and examine the aspiration forces they generate as well as the force of catheter tip detachment from an artificial thrombus.MethodsUsing an artificial thrombus made from polyvinyl alcohol gel, we tested various mechanical characteristics of commercially available suction pumps, including the Penumbra Jet Engine, Penumbra Max, Stryker Medela AXS, Microvention Gomco, and a 60 cc syringe. Both aspiration pressure and tip force generated were analyzed. Subsequently, a cohort of thrombectomy catheters were assessed using the Penumbra Jet Engine to determine tip forces generated on an artificial thrombus. One-way analysis of variance was used to assess statistical significance.ResultsThe Penumbra Jet Engine system generated both the highest maximum aspiration pressures (28.8 inches Hg) and the highest tip force (23.68 grams force (gf)) on an artificial thrombus, with statistical significance compared with the other pump systems. Using the Jet Engine, the largest-bore catheter was associated with the highest tip force (32.12 gf). The overall correlation coefficient between catheter inner diameter and tip force was 0.98.ConclusionsThe Penumbra Jet Engine pump generates significantly higher vacuum pressures and tip forces than the other commercially available aspiration pump systems. Furthermore, catheters with a larger inner diameter generate higher tip suction forces on aspiration. Whether these mechanical features lead to improved clinical outcomes is yet to be determined.
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Abdreshov, Sh A., A. E. Aldiyarova, and E. T. Kaypbaev. "RESEARCH RESULTS OF THE IMPROVED HYDRAULIC JET PUMPING UNIT." NEWS of National Academy of Sciences of the Republic of Kazakhstan 6, no. 444 (2020): 14–22. http://dx.doi.org/10.32014/2020.2518-170x.125.
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The scientific article is aimed at substantiating the classification of hydraulic jet pumping units, developing an experimental model of an improved hydraulic jet pumping unit, conducting experimental studies - determining the useful flow Qгн depending on the flow rate of the centrifugal pump used Qн for two variants of the pumping unit operating according to the traditional and alternative technology of water lifting, determination of the head losses hснi and friction coefficients ξснi in jet pumps, increasing the ejection coefficient Ke from the swirl parameter S of water supply to the intake chamber of the jet pump and laboratory tests of the hydraulic jet pumping unit for agricultural water supply and irrigation of pastures. The results of experimental studies and laboratory tests of an experimental model of an improved water-jet pumping unit, developed at NAO KazNAU, are presented. An analysis is given of the results of comparative tests of a hydraulic jet pumping unit for two variants of the technological process: an alternative and a traditional one with an increase in the effective supply of an alternative option by 2-4 times, a decrease in the required pressure by 1.5-2 times and an increase in efficiency by 1.1-2 times. The aim of the study is to obtain results to substantiate the classification of hydraulic jet pumping units, to carry out experimental studies and laboratory tests of an improved hydraulic jet pumping unit operating according to an alternative water lifting technology, which allows to reduce the required head of the pumping unit, increase the useful flow and increase the efficiency of the improved hydraulic jet pumping unit. The work used patent research with a review of works that were carried out according to existing methods: identifying close analogues, analyzing existing works and using them in development. Experimental studies were carried out to study the technological process of water rise from wells, the processes occurring in the used jet pumps - determining the useful flow depending on the flow of a centrifugal pump, determining the pressure losses and friction coefficients in jet pumps, the ejection coefficient and checking the reliability of the theoretical assumptions obtained. Based on the analysis of the work performed and patent research on technologies for lifting water from underground water sources by hydraulic jet pumping units and designs developed for them, a substantiated classification of hydraulic jet pumping units is proposed, which allows, depending on the task at hand, to correctly choose the necessary structural and technological scheme, type of jet pump and its implementation in the development of the required effective standard sizes of the hydraulic jet pumping unit. The scheme of the test bench and the experimental model of the improved hydraulic jet pumping unit with measuring equipment and instruments for conducting experimental research and laboratory tests on a bench well is presented.
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Kryzhanivskyy, Ye І., and D. O. Panevnyk. "The downhole jet pumps experimental studies efficiency improving." METHODS AND DEVICES OF QUALITY CONTROL, no. 1(44) (June 24, 2020): 16–23. http://dx.doi.org/10.31471/1993-9981-2020-1(44)-16-23.
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On the basis of the analysis of the existing criteria of hydraulic similarity, the rules of transferring the results of laboratory tests of jet pumps to the conditions of their operation in the well are considered. The geometric similarity of the flow part of the jet pump is determined by the diameters of the working nozzle, the mixing chamber and the diffuser, the lengths of the mixing chamber and the diffuser, and the distance between the working nozzle and the mixing chamber. The kinematic similarity of mixed flows is determined by the ratio of the speeds or costs of the injected and the workflows, and the dynamic one by the relative pressure in the form of the pressure ratio of the mixed, injected and workflows. To characterize the similarity of motion modes and physical properties of flows in the flowing portion of a jet pump, a Reynolds number for working, injected, and mixed flows can be used. The functional relationship between the quantities that characterize the process of mixing threads can be represented as a relationship between the similarity criteria that are made of them. The equality of any two relevant similarity criteria made up of the basic parameters and initial boundary conditions is a sufficient sign of the similarity of the two systems. A generalized Eulerian criterion is proposed for modeling a wellbore jet pump workflow that provides a relationship between geometric, kinematic, and dynamic dimensionless complexes. Due to the structural features of the ejection systems, the generalized criterion is presented in the form of a ratio of Euler criteria of mixed and working flows, the numerical values of which do not differ from the magnitude of the relative pressure of the jet pump. As a result of the conducted researches, the values of dimensionless complexes are determined, which determine the conditions for transferring the results of experimental studies of the jet pump model to the real design of the well ejection system.
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Xu, Jian Ning, Wen Jie Lv, Duan Yin Zhu, and Yan Xiong Gao. "Laboratory Experimental Research on Basic Characteristics of Back Pressure Jet Pump." Applied Mechanics and Materials 248 (December 2012): 438–42. http://dx.doi.org/10.4028/www.scientific.net/amm.248.438.
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Jet pump has different basic characteristics when it is used in different working condition. According to the model of jet pump unloading system used in the oilfield, the lab experiment use high pressure pump to provide high power liquid and suction liquid, and also making use of throttle valve providing back pressure condition, to simulate the condition of oil well unloading system much better. The experiment tests pressure and flow of power liquid, suction liquid and mixture liquid , and achieve the basic characteristic curve of jet pump. The result show that according to the different application conditions, can change the jet pump efficient working area range when needed, by adjusting the distance between nozzle and throat, and the optimal distance is the diameter of nozzle 2~3 times.
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Yakymechko, Ya Ya, L. B. Moroz, S. O. Oveckiy, and Ya M. Femiak. "Methods for determining the technological parameters of an advanced jet well installation." Prospecting and Development of Oil and Gas Fields, no. 3(80) (September 30, 2021): 26–35. http://dx.doi.org/10.31471/1993-9973-2021-3(80)-26-35.
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The article considers the use of a jet pump design with separate workflows for the production of high-viscosity oil. The authors have developed an improved design of a jet well unit with separate workflows, in which the working fluid, moving through the inner annulus, reaching the pump housing, is divided into two streams. A portion of the working mixture - 40% (depending on the cross section of the nozzle of the twisting chamber) enters the twisting chamber of the hydrodynamic cavitator, via which the working fluid passes, creating gas bubbles. These bubbles flake under the action of external pressure at the outlet of the chamber when the liquid passes through a stepped diffuser. The second portion of the working mixture - 60% (depending on the cross section of the jet nozzle) enters the pump nozzle, where flowing at high speed, forms a zone of reduced pressure, resulting in the mixture and oil from the subpacker enter the mixing chamber of the device. We have considered the conditions that can provide the effect of gushing, taking into account the fact that with the use of jet devices can achieve this effect. There may be two cases: 1) the extraction of fluid from wells is limited; 2) the extraction of fluid from wells is unlimited. The initial data, technological parameters and the sequence of their determination are given for the variant when light oil is used as a working liquid, and the working pressure of the surface power plant is not set. Determining the technological parameters of the well unit is a solution to the direct problem, and then - the reverse one. The improved method for calculating the technological parameters of a jet well unit with separate workflows, the design of which has no analogues in Ukraine, is proposed. This technique has been tested during industrial tests of a prototype of an equipment set for the extraction of high-viscosity oils. The method of operation of the pumping-ejector downhole jet unit with a hydrodynamic pulsator for the extraction of high-viscosity oils is protected by a patent of Ukraine.
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Dai, Xiao Chun, and Jian Huo. "Numerical Simulation on Flow Structure of a Steam-Jet Pump Influenced by Primary Nozzle Geometries." Applied Mechanics and Materials 130-134 (October 2011): 1703–7. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.1703.
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The aim of the paper is to reveal the flow structure and the mixing process of a steam-jet pump by using a computational fluid dynamics code FLUENT. Discusses the effect on a steam-jet pump’s entrainment ratio when the throat diameter of the primary nozzle as well as the outlet diameter of the primary nozzle is varied. Analyzes the position of shock wave which will bring the steam-jet pump’s performance a great loss. The performances of a steam-jet pump are studied by changing back pressures while the distance between primary nozzle outlet and mixing chamber inlet (DPM) is varied. The entrainment ratios of a steam-jet pump with different values of DPM and different back pressures are calculated.
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Meakhail, Tarek, and Ibrahim Teaima. "Experimental and numerical studies of the effect of area ratio and driving pressure on the performance of water and slurry jet pumps." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 226, no. 9 (2011): 2250–66. http://dx.doi.org/10.1177/0954406211430458.
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The slurry jet pump with scouring nozzle system can be used in dredging of sites, which are difficult to access or need handling of equipments that are used for the intake of pumping stations under bridges and concrete water channels. This system is suitable for sand, silt, sludge, mud, and other organic materials. The aim of this study is to investigate the performance of water and slurry jet pumps. The effects of the pump-operating conditions and geometries on its performance were investigated. The experimental rig was constructed in such a way that the driving nozzle diameter can be changed. In this study, three different diameters of driving nozzles, 10, 12.7, and 16 mm, have been used with one mixing chamber of 25.4 mm diameter (i.e. three different area ratios of R = 0.155, 0.25, and 0.4). Also, the effect of driving pressure has been investigated. The results show that increasing the area ratio decreases the maximum mass flow ratio. The results of computational fluid dynamics were found to agree well with actual values obtained from the experimental water and slurry jet pump.
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S, Gomaa. "Electrical Submersible Pump Design in Vertical Oil Wells." Petroleum & Petrochemical Engineering Journal 4, no. 4 (2020): 1–7. http://dx.doi.org/10.23880/ppej-16000237.
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Artificial Lift is a very essential tool to increase the oil production rate or lift the oil column in the wellbore up to the surface. Artificial lift is the key in case of bottom hole pressure is not sufficient to produce oil from the reservoir to the surface. So, a complete study is carried to select the suitable type of artificial lift according to the reservoir and wellbore conditions like water production, sand production, solution gas-oil ratio, and surface area available at the surface. Besides, the maintenance cost and volume of produced oil have an essential part in the selection of the type of artificial lift tool. Artificial lift tools have several types such as Sucker Rod Pump, Gas Lift, Hydraulic Pump, Progressive Cavity Pump, Jet Pump, and Electrical Submersible Pump. All these types require specific conditions for subsurface and surface parameters to apply in oil wells. This paper will study the Electrical Submersible Pump “ESP” which is considered one of the most familiar types of artificial lifts in the whole world. Electrical Submersible Pump “ESP” is the most widely used for huge oil volumes. In contrast, ESP has high maintenance and workover cost. Finally, this paper will discuss a case study for the Electrical Submersible pump “ESP” design in an oil well. This case study includes the entire well and reservoir properties involving fluid properties to be applied using Prosper software. The results of the design model will impact oil productivity and future performance of oil well.
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Xu, Kai, Gang Wang, Liquan Wang, et al. "Parameter Analysis and Optimization of Annular Jet Pump Based on Kriging Model." Applied Sciences 10, no. 21 (2020): 7860. http://dx.doi.org/10.3390/app10217860.
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Jet pump efficiency heavily relies on the geometrical parameters of the pump design and parameter global optimization in the full variable space is still a big challenge. This paper proposed a global optimization method for annular jet pump design combining computational fluid dynamics (CFD) simulation, the Kriging approximate model and experimental data. The suction angle, the flow ratio, the diffusion angle, and the area ratio are selected as the design variables for optimization. The optimal space filling design (OSF) method is used to generate sampling points from the design space of the four design variables. The optimization method solves the constrained optimization problem with a given head ratio by building the functional relationship established by the Kriging model between efficiency and design parameters, which makes the method more applicable. The design result shows that the annular jet pump efficiency is predicted well by the Kriging model; m is a key variable affecting the annular jet pump efficiency. As the area ratio m decreases, the mixing effect at the suction chamber outlet can be improved, but the frictional resistance increases.
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Myrzakhmetov, B. А., L. А. Krupnik, А. E. Sultabayev, and S. М. Toktamissova. "Mathematical model of jet pump operation in tandem oil well pumping unit." Mining Informational and analytical bulletin 8 (2019): 123–35. http://dx.doi.org/10.25018/0236-1493-2019-08-0-123-135.
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Panevnyk, Denis. "Simulation of a downhole jet-vortex pump’s working process." Nafta-Gaz 77, no. 9 (2021): 579–86. http://dx.doi.org/10.18668/ng.2021.09.02.
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The article is devoted to the theoretical study of the operation process of the borehole ejection system as part of the tubing string, jet pump and packer installed below; the system implements the hydrojet method of oil well operation. The improved design of the jet pump contains inclined guiding elements placed in its receiving chamber for swirling the injected flow, which results in an increase in the efficiency of the borehole ejection system. Based on the law of conservation of liquid momentum in the mixing chamber of the jet pump and taking into account the inertial pressure component caused by the swirling of the injected flow, there is obtained the relative form of the equation of the ejection system pressure characteristic, the structure of which contains a component that determines the value of the additional dynamic head. According to the results obtained, the additional dynamic head caused by swirling of the injected flow is determined by the ratio of the geometric dimensions of the flow path of the jet pump, the angle of inclination of the elements for creating vortex flows, and the ratio of the power and reservoir fluids. In the case of asymmetric swirling of the injected flow, an increase in the value of the relative displacement of the jet pump decreases the value of the additional dynamic pressure. In order to study the effect of flow swirling on the energy characteristic of the ejection system, the pressure characteristic of the jet pump was transformed into the dependence of its efficiency on the injection coefficient. Jet pump models with the ratio of the cross-sectional areas of the mixing chamber and the nozzle of 5.012 and 6.464, respectively, were used to check the adequacy of the theoretical pressure and energy characteristics obtained during the simulation of the performance process of the concentric ejection system. The average error in the theoretical determination of the pressure and efficiency of the vortex jet does not exceed 8.65% and 6.48%, respectively.
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Tang, Chuan Lin, Dong Hu, and Feng Hua Zhang. "Study on the Frequency Characteristic of Self-Excited Oscillation Pulsed Water Jet." Advanced Materials Research 317-319 (August 2011): 1456–61. http://dx.doi.org/10.4028/www.scientific.net/amr.317-319.1456.
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The self-excited oscillation pulsed water jet (SEOP Jet ) has been used extensively in oil and gas well drilling, mineral mining, cutting and industrial cleaning. In order to improve the valid stand-off distance of water jet pressure and its range of action, the model of oscillation frequency of jet was given on the basis of hydroacoustics and fluid dynamics for better understanding the principle of increasing jet pressure amplitude. The SD150test system was used to analyze the effects of dynamic parameters on the frequency, the effects of pump pressure and the cavity length on the frequency were studied in detail. The test results showed that the peak value of the SEOP Jet is larger by about 20% than that of continuous jet. The oscillation frequency increased while increasing pump pressure and decreased while increasing cavity length. There was an optimum cavity length corresponding to the pressure peak value of the SEOP Jet. Experimental result is in good agreement with that of theoretical analysis.
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Han, Wei, Ting Shang, Min Su, Chengyong Gong, Rennian Li, and Bin Meng. "Direct Sailing Variable Acceleration Dynamics Characteristics of Water-Jet Propulsion with a Screw Mixed-Flow Pump." Applied Sciences 9, no. 19 (2019): 4194. http://dx.doi.org/10.3390/app9194194.
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Strong nonlinearity and the relevance of time-varying dynamic parameters in the maneuverable process of water-jet propulsion were major problems encountered in the prediction of variable acceleration dynamics characteristics. The relationships between the thrust and rotation speed of a screw mixed-flow pump, drag and submerged speed of water-jet propulsion were obtained from flume experiments and numerical calculations, based on which a dynamic model of pump-jet propulsion was established in this paper. As an initial condition, the numerical solution of the submerged speed with respect to time was inputted to computational fluid dynamics (CFD) for unsteady calculation based on a user-defined function (UDF). Thus, the relationships between the acceleration, drag, net thrust, propulsion torque and efficiency with respect to time were revealed. The results indicate that the relationship between the thrust and rotational speed of a water-jet propeller is a quadratic function, which agrees well with the experimental values. The variation of submerged speed with respect to time satisfies a hyperbolic tangent function distribution. The acceleration increases sharply at the beginning and then decreases gradually to zero, especially at high rotation speeds of the water-jet pump. The variations in drag and propulsion efficiency with respect to time coincide with the step response of a second-order system with critical damping. The method and results of this study can give a better understanding of the changes in dynamic parameters such as velocity, acceleration, thrust, and drag during the acceleration of a pump-jet submersible and helped to estimate the effects of pump performance on water-jet propulsion kinetic parameters.
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Zhou, Yunkai, Longyan Wang, Jianping Yuan, et al. "Comparative Investigation on Hydrodynamic Performance of Pump-Jet Propulsion Designed by Direct and Inverse Design Methods." Mathematics 9, no. 4 (2021): 343. http://dx.doi.org/10.3390/math9040343.
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Pump-jet propulsion, a new propulsion technology, is primarily designed for underwater vehicles. Because of its concealment and excellent performance, it has been widely used, but due to its confidentiality and complexity, few studies have been published. To explore the relevant design theory of pump-jet propulsion with the aim of increasing its performance, in this study, we applied the direct and inverse design methods to construct a three-dimensional pump-jet model. The direct design method was carried out by comparing the lifting and lifting-line design methods, followed by further geometric optimization of the better model. In a numerical study using computational fluid dynamics (CFD) simulations, the Reynolds Averaged Naviere-Stokes (RANS) equations with SST k-ω turbulence model were solved in a cylindrical computational domain around the pump-jet propulsion device. A numerical investigation of the E779A propeller was carried out beforehand, using different advance ratios, in order to validate the accuracy of the numerical simulation method. The results show that for the direct method, although the model designed using the lifting-line method produced a greater thrust and the pump-jet designed using the lifting method was more efficient and stable, which is more suitable for small and medium underwater vehicles. When considering the inverse design method, the pump-jet propeller obviously accelerated the fluid, and the speed was obviously greater than that designed using the direct design method, while the turbulent kinetic energy in the flow field was higher, as well as the energy loss. Therefore, for small- and medium-sized underwater vehicles, if the priorities are high thrust and high efficiency, the inverse design method is the best option, whereas if stability and lower energy loss are preferred, the direct design method should be adopted.
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Zang, Wei, Xin Cheng Li, Yi Chen, and Yu Ting Luo. "Numerical Study of the inside Flow Field and the Rectangle Channel Impeller of Roto-Jet Pump." Applied Mechanics and Materials 529 (June 2014): 164–68. http://dx.doi.org/10.4028/www.scientific.net/amm.529.164.
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By means of ANSYS-CFX, the 3D numerical simulations of flow field for the three hydraulic models are performed. Through comparing the three types of pumps with three different rectangle channel impellers which have different spread angle, blade, the authors draw conclusions: the distribution of the pressure and velocity in the rectangle flow channels with 6° spread angle is well-proportioned, the head and the efficiency of the whole pump can meet the requirement: But the other two types of impeller channels, the distribution of velocity is unstable, there are backflow and big whirlpool. Therefore, the rectangle channel impeller with 6°spread angle is a better type for the Roto-Jet pump.
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Castro, J. Cruz, E. Hernández Palafox, I. A. Alarcón Sánchez, Luis H. Hernández-Gómez, Pablo Ruiz-López, and A. Armenta Molina. "Analysis of the Leakage-Flow-Induced Vibration of a Slip Joint in a Jet Pump of a Boiling Water Reactor." Defect and Diffusion Forum 390 (January 2019): 23–31. http://dx.doi.org/10.4028/www.scientific.net/ddf.390.23.
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The purpose of this analysis is to evaluate the structural integrity of the jet pump assembly of a BWR during the performance of its operational and safety functions. The natural frequencies and vibration modes of the jet pump assembly immersed in water were determined. It was observed that the fourth mode shape was torsional, and its associated resonance frequency was 41.82 Hz. Also, the vibration induced by the flow in the leakage of the slip joint was analyzed with an axisymmetric model. The gap of the slip joint was varied from 0.2 mm until 0.65bmm. A gap between 0.6 and 0.64, would cause flow-induced vibration because this excitation frequency matches with the fourth natural frequency of the jet pump assembly. The above was carried out using computational fluid dynamics, as well as the finite element method, with ANSYS Structural and ANSYS Fluent codes.
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Helios, Muhammad Penta, and Wanchai Asvapoositkul. "Numerical studies for effect of geometrical parameters on water jet pump performance via entropy generation analysis." Journal of Mechanical Engineering and Sciences 15, no. 3 (2021): 8319–31. http://dx.doi.org/10.15282/15.3.2021.10.0654.
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This paper presented an implementation of entropy generation analysis in the main flow field of a water jet pump via the CFD method. This study aimed to identify the inefficient location of energy conversion and to analyse entropy generation sources in each region of the water jet pump. The 2D-axisymmetric model and realisable k-ε (RKE) turbulence model at steady-state conditions were performed to validate jet pump performance and to assess the entropy generation. Likewise, the effects of the projection ratio and throat-aspect ratio as independent parameters were investigated. As a result, the throat is the most inefficient part due to the high total entropy generation rate, following by diffuser part. Also, the entropy generation rate was assessed dominant than viscous dissipation due to the turbulent dissipation, which was caused by a turbulent shear stress layer of mixing the streams. In conclusion, the projection ratio influenced the growth of the shear stress layer as well as the entropy generation. Further, the throat-aspect ratio affected the distribution of entropy generation in the throat section. An appropriate combination of both parameters has an impact on the jet pump performance improvements reducing the entropy generation rate in the future.
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Panevnik, A. V. "Performance curves of a well jet pump during back flushing of the face zone." Chemical and Petroleum Engineering 36, no. 6 (2000): 348–50. http://dx.doi.org/10.1007/bf02463672.
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Panevnyk, D. О. "Substantiation of the method of modeling circulating flows during the rotation of the overhead jet pump." Prospecting and Development of Oil and Gas Fields, no. 3(80) (September 30, 2021): 46–52. http://dx.doi.org/10.31471/1993-9973-2021-3(80)-46-52.
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The scheme of theoretical analysis of the influence of rotational motion on the working process of the near-bit jet pump is chosen, the methods of its realization and limits of use are determined. On the basis of the potential flows theory with the application of elementary hydrodynamic functions of a complex variable, basics for the development of analytical models of the near-bit ejector pump operation for conditions of its rotation in a well have been worked out. Components of a mixed flow are modeled as functions of the vortex flow and parallel jet flow. Application of certain hydrodynamic functions of a complex variable has allowed to combine partial outcomes of differential equations of elementary streams motions and to determine the structure of the mixed flow function. The equation of the mixed flow motion is given in the form of a complex potential, components of which are equal to Laplace’s equation and Cauchy-Riemann Conditions, and determine the kinematics of irrotational flow. Possibility of application of the complex variable functions’ theory for velocities profiles modeling and determination of limits for dissociation of mixed flows by rotation of the near-bit jet pump in a well has been shown. The list of hydro-dynamic parameters, which should be taken into consideration by modeling of the ejector system working process, has been determined, and the structure of initial equations, that characterize kinematic picture of velocities field in the chamber of the ejector pump mixing has been established. Limit conditions for determination of a complex potential of mixed flows and application limits of the proposed method of circulation flows modeling have been stated. The class of hydrodynamic problems has been established, to which one may relate the problem of finding the complex potential of mixed flows in a chamber for mixing of an ejector pump by its rotation in a well.
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Dubey, O. Ya. "DETERMINATION OF THE INPUT PARAMETERS OF THE WORK-STREAM OF THE OIL-GAS EJETOR USED SIMULTANEOUSLY WITH THE SUCKER-ROD PUMP." Prospecting and Development of Oil and Gas Fields, no. 1(70) (March 29, 2019): 60–69. http://dx.doi.org/10.31471/1993-9973-2019-1(70)-60-69.
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In order to calculate the working mode of a sucker-rod pump driven by the beam pumping unit and a jet pump during their simultaneous operation, pressure and temperature distribution along the wellbore from the bottom to the wellhead is determined for the real oil well 753-D "Dolynanaftogaz" Field Office. To calculate these parameters an improved methodology based on known Poettmann-Carpenter and Baxendel methods is used. As a result, the imperfection of these methods was eliminated, namely the assumption that pressure and temperature behavior along the wellbore is linear. This led to obtaining results which are up to 23% more accurate. In addition, using the algorithm for determining the density of perfect (ideal) liquid-gas mixture, the author has calculated the velocities of gas-water-oil and water-oil mixtures for a number of sections along the production tubing at different angles of the crank position in the beam pumping unit. The indicated values make it possible to determine the depth of the oilgas jet pump location in the well, and, consequently, the parameters at its input (pressure, temperature, velocity of the liquid-gas mixture, its density, etc.). Besides, the author studies the dependence which describes the behavior of the liquid-gas mixture density along the wellbore, as well as the relations between the density of the free oil gas, thevolumetric consumption gas content of the flow and the placement of the section under consideration. All of the above-mentioned algorithms were implemented using developed computer programs. The obtained results give a possibility to choose the location of the jet pump in the well which is the most advantageous one for ensuring maximum pressure reduction and the decrease in the stem load.
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Shi, Xiaobing, Jinling Lu, and Lianming Zhao. "Investigations on the influence of tandem blades on inner flow and performance characteristics of centrifugal pump." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 234, no. 1 (2019): 46–55. http://dx.doi.org/10.1177/0954408919883730.
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Although significant advances have been made in tandem-blade technology for axial and centrifugal compressors, little attention has been paid to its application in centrifugal pumps. In this study, we propose a new tandem-blade design method for improving inner flow characteristics and overall performance of a centrifugal pump. With the SST k − ω turbulence model, three-dimensional turbulent flow fields in the centrifugal pump with tandem blades are simulated and analyzed. The effects of tandem blades on the inner flow and performance characteristics of the centrifugal pump are investigated. The predicted velocity and pressure distributions and flow behavior of the tandem-blade impeller are compared with those of a conventional single row blade impeller. It is indicated that the centrifugal tandem-blade impeller exhibits a significant advantage in terms of the uniformity of the impeller discharge flow. The tandem blades improve the jet-wake structure and uniformity of velocity and pressure distributions at the impeller outlet, and thus reduce the pressure fluctuation and hydraulic loss. Moreover, the hump phenomenon is eliminated or alleviated under low flow rate conditions, and the tandem-blade impeller has better hydraulic performance within a wider operating range as well as high reliability. This study provides a basis for the further development of the centrifugal pump with tandem blades.
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Zhao, Wei, and Chu Wen Guo. "Design of a Novel Down-Hole Pump with Hydro-Automatic Reversing Valve." Applied Mechanics and Materials 456 (October 2013): 120–24. http://dx.doi.org/10.4028/www.scientific.net/amm.456.120.
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Ultra-high-pressure-jet-assisted drilling is a main technique for improving the rate of penetration in well drilling. In this paper, a novel down-hole pump with hydro-automatic reversing valve was designed and explained. The equipment is a kind of hydraulic piston pump in which the reversing valve, the core component of the pump, is a five-way, two-position control valve. With the explanation of the working principle, it is understood that the down-hole pump has simple operating principle. According to schematics of the assembly drawing, also it is known that the actuations of pistons, check valves and the reversing valve are not complicated. Calculation and analysis results indicate that the equipment can intensify the drilling mud to 140-170MPa within an area ratio of 9.9 and 11.9 theoretically.
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Chen, Jianda, Dajiang Wang, Zhiquan Zhang, and Jie Liu. "Reasonable Pumping Depth for Drainage and Gas Recovery of Shale Gas Wells." International Journal of Heat and Technology 38, no. 3 (2020): 701–7. http://dx.doi.org/10.18280/ijht.380314.
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For shale gas wells, in the initial production stage, the liquid production is large, and the lifting process is needed to assist the drainage. However, for gas wells, especially shale gas wells, the ultimate purpose is different from that of oil wells, and the current design method of pumping depth cannot meet the field requirements. Starting from the production characteristics of liquid-producing gas wells, this paper analyzed the gas well productivity, wellbore pressure distribution and critical liquid-carrying flow, and adopted the node analysis method to propose a design method for the pumping depth of shale gas wells during drainage and gas recovery. Then, the proposed method was applied to optimize the design of the jet pump of well A in Block JY, according to the design results, the pump was started for production; after the wellbore liquid level was raised to the designed depth, the gas well can conduct annulus space liquid-carrying production, and the production effect of well A showed that, the proposed method can be applied as a method for optimizing the technological parameters of shale gas wells.
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Harding, Samuel F., Robert P. Mueller, Marshall C. Richmond, Pedro Romero-Gomez, and Alison H. Colotelo. "Fish Response to Turbulence Generated Using Multiple Randomly Actuated Synthetic Jet Arrays." Water 11, no. 8 (2019): 1715. http://dx.doi.org/10.3390/w11081715.
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Hydroelectric power stations generate turbulent flow conditions, which represent a potentially significant hydraulic stressor to fish passing through the turbine system. A test facility has been developed using two randomly actuated synthetic jet arrays (RASJAs) of 25 independent submersible pumps to generate a turbulent flow field for biological dose-response testing. The novel elements of this approach include the ability to control the exposure duration within a test volume due to low mean flow velocity as well as the capacity to scale the turbulence levels as a function of pump capacity. Juvenile Chinook salmon (Oncorhynchus tshawytscha) were subjected to the turbulent flow regime with average turbulence kinetic energy per unit mass of 0.089 m 2 / s 2 for periods of 2 min and 10 min. No significant loss of equilibrium or disorientation was observed after exposure for either duration at the level of turbulence achieved in this prototype. Further scaling of this approach is required to generate a complete dose-response relationship.
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Li, Qiao, Shahrir Abdullah, and Mohammad Rasidi Mohammad Rasani. "A Review of Progress and Hydrodynamic Design of Integrated Motor Pump-Jet Propulsion." Applied Sciences 12, no. 8 (2022): 3824. http://dx.doi.org/10.3390/app12083824.
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The integrated motor pump-jet (IMP) propulsion system is a form of modern underwater vehicle propulsion that uses a modular design paradigm. The integrated motor propulsor is a compact construction consisting of a permanent magnet (PM) and a pump-jet propulsor, as well as the propulsion and electrical systems. Compactness, great reliability, and low noise are the most significant features of this technology. The primary technology research status and main application configurations of propulsion devices with an integrated motor were examined based on the working principles and attributes of the devices. The theoretical and experimental research on the design, performance analysis, and control of IMPs is discussed, covering electric motors; bearing structures; hydrodynamic design; and hydrodynamic, electromagnetic, and bearing coupling design technology. This research investigates the most recent research goals, progress, and applications of IMPs, which includes their hydrodynamic performance, cavitation, and gap flow. Finally, the future essential technologies of high power, low vibration, water-lubricated bearings, electromagnetic and bearing coupling design, and IMP antipollution and antidamage capacity are summarized.
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Larin, O., A. Kelin, R. Naryzhna, K. Potopalska, and O. Trubayev. "Analysis of the Pump Strength to Extend its Lifetime." Nuclear and Radiation Safety, no. 3(79) (August 28, 2018): 30–35. http://dx.doi.org/10.32918/nrs.2018.3(79).05.
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The paper deals with the estimation of the residual strength of the body of water jet pump SN-10 /50K type operating in the beyond design lifetime in the line of NPP unit sprinkler pumps. The results of theoretical studies of its stressed-strained state are presented taking into account change in the geometry of body parts, which was observed after completion of the design lifetime. Static strength assessment was carried out for the main operating modes of the pump operation (normal operating conditions and hydraulic tests), as well as for conditions of an emergency situation. Corresponding researches were carried out in the framework of numerical computer simulation on the basis of the finite element method using up-to-date software complexes. 3D finite element models have been developed that take into account actual geometry of the pump components and the forecast of its possible change for a period of extended lifetime. The change in the design geometry is taken into account based on the extrapolation of the data of thickness measurement of the pump body walls obtained during the long service period. Based on the built finite-element models, the tasks of thermal conductivity and thermoelasticity have been consistently solved. The phenomenon of thermal shock on body parts was simulated that allow assessing residual pump strength in case of an emergency. Corresponding simulation was carried out by solving the problems of nonstationary thermal conductivity and the related problem of quasi-static thermoelasticity. Such an approach made it possible to determine the distribution of the temperature field over time under thermal shock, and the distribution of the stressed-strained state parameters of the pump at certain time moments.
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Sivasamy, K., C. Arumugam, S. R. Devadasan, R. Murugesh, K. K. Arun, and K. M. Senthilkumar. "Overcoming of low discharge problem in shallow well jet pump through the application of total quality function deployment." International Journal of Productivity and Quality Management 24, no. 2 (2018): 242. http://dx.doi.org/10.1504/ijpqm.2018.091795.
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Senthilkumar, K. M., K. K. Arun, K. Sivasamy, C. Arumugam, S. R. Devadasan, and R. Murugesh. "Overcoming of low discharge problem in shallow well jet pump through the application of total quality function deployment." International Journal of Productivity and Quality Management 24, no. 2/3 (2018): 242. http://dx.doi.org/10.1504/ijpqm.2018.10012948.
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Najjaran, Abdolkarim, Reza Ebrahimi, Morteza Rahmanpoor, and Ahmad Najjaran. "Numerical Simulation of Electrohydrodynamic (EHD) Atomization in the Cone-Jet Mode." Applied Mechanics and Materials 325-326 (June 2013): 180–85. http://dx.doi.org/10.4028/www.scientific.net/amm.325-326.180.
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Electrohydrodynamic (EHD) has been applied in many areas, such as EHD atomization, EHD enhanced heat transfer, EHD pump, electrospray nanotechnology, etc. EHD atomization is a promising materials deposition technique as it allows uniform and regular deposition, and offers a range of other advantages, such as low cost compared with other current techniques, easy set-up, high deposition rate, and ambient temperature. Simulation is carried out using ANSYS FLUENT system. The approach in this work was to simultaneously solve the coupled (EHD) and electrostatic equations. The fields of velocities and pressure, as well as electric characteristics of EHD flows, are calculated. The model does not include a droplet break-up model.
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Ermolenko, F. I., and T. N. Minnivaleev. "Simulation of formation fluid withdrawal hydrodynamics using a downhole jet pump when studying the productive formation while well drilling." Journal of Physics: Conference Series 1333 (October 2019): 032014. http://dx.doi.org/10.1088/1742-6596/1333/3/032014.
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Sivasamy, K., C. Arumugam, S. R. Devadasan, R. Murugesh, S. Venkatachalam, and V. M. M. Thilak. "Prevention of water leakage in the shallow well jet pump through the application of total quality function deployment technique." International Journal of Business Innovation and Research 15, no. 3 (2018): 381. http://dx.doi.org/10.1504/ijbir.2018.089755.
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