Претрага
2444 items
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Design of a sucker rod pumping system
Ana Ponoćko (2024)For a long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element of the system enables optimization, which entails benefits in the form of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The ...... labeled as: -1, -2, -3, -4, and -5, indicating clearances from 0.001 in to 0.005 in. The amount of fluid leakage through the space (clearance) between the plunger and the cylinder is determined based on experimental data and is expressed in various forms. The general equation for fluid loss through ...
... excessive sand production, and excessive gas production through the pump, the API method does not provide accurate results. API is the result of electrical analog computer studies of sucker rod motion. This predated the numerical solution of the wave equation and was not as general. However, the analog ...
... because it is the most general and the most accurate of the two methods of pumping design discussed in this chapter. The foundation of this method is the numerical solution of the wave equation for the sucker rod string. This requires knowledge of the pumping unit characteristics and assumed pump operating ...Ana Ponoćko. Design of a sucker rod pumping system, 2024
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Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine
... relative growth of oscillation velocity of the rock mass and relative growth of reduced distances. Thereby, in a marginal case, a differential equation, whose general integral overlaps with the law of Sadovski, is obtained. Parameters n and K in the law of Sadovsky were determined in two ways - models ...
... BLASTING AT "NEPRIČAVA" OPEN PIT MINE NEAR LAJKOVAC 4.1. General characteristics of "Nepričava" Open Pit Mine The limestone deposit "Nepričava" is situated at a distance of about 7.0 km west of town of Lajkovac, along the road and railroad Lajkovac - Valjevo, on the left bank of Kolubara River ...
... is transformed into a mechanical work. That energy, in the vicinity of blasting location, destructs and crushes rock mass, a bit further creates cracks and permanent deformations in the rock mass, and even further it is being transformed into elastic deformations. The effect of elastic seismic wave ...Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina. "Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine" in Underground Mining Engineering, Belgrade : University of Belgrade, Faculty of Mining and Geology (2015). https://doi.org/10.5937/podrad1526009L
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The ‘Umka’ landslide
We present an in-depth landslide map of the ‘Umka’ landslide near Belgrade, Serbia, at a scale of 1:5000. The map delineates elements at risk, primarily buildings and road infrastructure impacted by the landslide displacements of several cm per year, introduced during frequent reactivation stages. The Main map results from a survey of over 350 buildings and more than 7 km of state and local roads. The acquisition techniques included engineering geological field mapping, building survey, and visual interpretation of ...rizik od klizišta, elementi rizika, kartiranje pomoću drona, ispitivanje objekata, geotehnički monitoring"Uroš Đurić, Dragana Đurić, Miloš Marjanović, Biljana Abolmasov, Ivana Vasiljević. "The ‘Umka’ landslide" in Journal of Maps, Informa UK Limited (2024). https://doi.org/10.1080/17445647.2024.2418580
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Environmental impact indicators in systematic monitoring of karst aquifer – Dinaric karst case example
Stevanović Zoran (2014)Stevanović Zoran. "Environmental impact indicators in systematic monitoring of karst aquifer – Dinaric karst case example" in Proceedings of the DIKTAS Conference: “Karst without boundaries”, Trebinje, June 11-15 2014, Trebinje:DIKTAS Project : Grafokomerc (2014): 80-85
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Abandoned chrysotile asbestos mines in Serbia: An environmental mineralogical study
Hargitai Anna, Tóth E., Vasković Nada, Milošević Maja, Weiszburg T.G.. "Abandoned chrysotile asbestos mines in Serbia: An environmental mineralogical study" in Acta Mineralogica-Petrographica, Abstract Series 7, Szeged, Hungary:University of Szeged (2012): 53-53
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Environmental Noise Management in the Area of Opencast Mines
Lilić Nikola, Cvjetić Aleksandar, Milisavljavić Vladimir, Pantelić Uroš, Kolonja Ljiljana. "Environmental Noise Management in the Area of Opencast Mines" in Tehnika LXXII no. 1, Beograd:Savez Inžinjera i Tehničara Srbije (2017): 47-52. https://doi.org/10.5937/tehnika1701047L
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Environmental Noise Management in the Area of Opencast Mines
Lilić Nikola, Cvjetić Aleksandar, Milisavljavić Vladimir, Pantelić Uroš, Kolonja Ljiljana. "Environmental Noise Management in the Area of Opencast Mines" in Tehnika LXXII no. Nebojša Bojović, Beograd: Savez inženjera i tehničara Srbije. https://doi.org/10.5937/tehnika1701047L
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The influence of alkyl polyglucosides (and highly ethoxylated alcohol boosters) on the phase behavior of a water/toluene/technical alkyl polyethoxylate microemulsion system
Marija Ilic, Franz-Hubert Haegel, Vesna Pavelkic, Dragan Zlatanovic, Snezana Nikolic-Mandic, Aleksandar Lolic, Zoran Nedic (2016)The influence of additives (alkyl polyglucoside, Glucopon 600 CS UP and alcohol ethoxylate C18E100) on the behavior of the water/toluene/Lutensol ON 50 (technical oxoalcohol, i-C10E5) microemulsion system as a function of temperature and composition has been investigated. The phase behavior of the microemulsions was determined by vertical sections through the Gibbs phase prism (fish-like phase diagrams). Alkyl polyglucoside shifts the one phase region to lower temperatures compared with water/toluene/Lutensol ON 50 mixtures. This is contrary to the expectation, considering ...микроемулзија, толуен, алкил полиглукозид, оксоалкохол етоксилат, појачивач ефикасности, „fish“ дијаграми... thank the Ministry of Education, Science and Technological Development of the Republic of Serbia for financial support under project number 172051, D. Richter and J. Allgaier (JCNS-1), Forschungszentrum, Julich, for providing experimen- tal equipment and the synthesis of Cy+gEio. Lutensol ...
... Condens. Matter 13 (2001) 9055-9074 R. Strey, M. Brandt, B. Jakobs, T. Sottmann, in Studies in Surface Science and Catalysis, Vol. 132, Y. Iwasawa, N. Oyama, H. Kunieda (Eds.), Elsevier Science, Amsterdam, 2001, pp. 39-44 H. Endo, M. Mihailescu, M. Monkenbusch, J. Allgaier, G. Gompper, D. Richter ...
... Interface and Colloid Science, J. Lyklema (Ed.), Academic Press, New York, 2005, pp. 5.1-5.96 K.R. Wormuth, S. Zushma, Langmuir 7 (1991) 2048-2053 C. Frank, H. Frielinghaus, J. Allgaier, H. Prast, Langmuir 23 (2007) 6526-6535 K. Hill, in Alky! Polyglucosides: Technology, Properties and Applications ...Marija Ilic, Franz-Hubert Haegel, Vesna Pavelkic, Dragan Zlatanovic, Snezana Nikolic-Mandic, Aleksandar Lolic, Zoran Nedic. "The influence of alkyl polyglucosides (and highly ethoxylated alcohol boosters) on the phase behavior of a water/toluene/technical alkyl polyethoxylate microemulsion system" in Chemical Industry and Chemical Engineering Quarterly, National Library of Serbia (2016). https://doi.org/ 10.2298/CICEQ141105015I
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Impact of geo-environmental factors on landslide susceptibility using an AHP method: A case study of Fruška Gora Mt, Serbia
Marjanović Miloš, Abolmasov Biljana, Đurić Uroš, Bogdanović Snežana. "Impact of geo-environmental factors on landslide susceptibility using an AHP method: A case study of Fruška Gora Mt, Serbia" in Geološki anali Balkanskoga poluostrva 74, Beograd, Srbija:Rudarsko-geološki fakultet i Institut za regionalnu geologiju i paleontologiju, Beograd (2013): 91-100. https://doi.org/10.2298/GABP1374091M
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The influence of back-arc extension direction on the strain partitioning associated with continental indentation: Analogue modelling and implications for the Circum-Moesian Fault System of South-Eastern Europe
analogno modelovanje, raspodela deformacija, transkurentno rasedanje, bidirekciona ekstenzija, Cirkum-mezijski rasedni sistemNemanja Krstekanić, Ernst Willingshofer, Liviu Matenco, Marinko Toljić, Uroš Stojadinović. "The influence of back-arc extension direction on the strain partitioning associated with continental indentation: Analogue modelling and implications for the Circum-Moesian Fault System of South-Eastern Europe" in Journal of Structural Geology, Elsevier BV (2022). https://doi.org/10.1016/j.jsg.2022.104599
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Fuzzy model of autogenous suspension coal cleaning
Benović Tomo, Miljanović Igor, Vujić Slobodan. "Fuzzy model of autogenous suspension coal cleaning" in Archives of Mining Sciences 57 no. 4, -:Polish Academy of Sciences - Committee of Mining (2012): 821-838. https://doi.org/10.2478/v10267-012-0055-9
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Developing Termbases for Expert Terminology under the TBX Standard
... MT. The exponential growth of aligned multilingual corpora greatly improved the efficiency and accuracy of SMT in general, and many tools based on this ap- proach, such as Google Translate, are thus being more and more widely used. This has led to a debate whether the development of termbases is still ...
... al equivalents of a term in other languages on the left hand side and details of the Russian translation on the right. Both GeolISSTerm and RudOnto are available for browsing and searching of the available terminology to the general public (without log-in). Figure 4 depicts the web interface of RudOnto ...
... mining engineering and geology, as well as the role of the TBX standard in this approach. In the next section we give an outline of three terminological resources developed at the University of Belgrade, Faculty of Mining and Geology (FMG). The third section is dedicated to a general discussion on TBX ...Ranka Stanković, Ivan Obradović, and Miloš Utvić. "Developing Termbases for Expert Terminology under the TBX Standard" in Natural Language Processing for Serbian - Resources and Applications, Belgrade : University of Belgrade, Faculty of Mathematics (2014)
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Size–strain line-broadening analysis of anatase/brookite (TiO<sub>2</sub>)-based nanocomposites with carbon (C): XRPD and Raman spectroscopic analysis
Aleksandar Kremenović, Mirjana Grujić-Brojčin, Nataša Tomić, Vladimir Lazović, Danica Bajuk-Bogdanović, Jugoslav Krstić, Maja Šćepanović (2022)A size-strain line-broadening analysis of the XRPD patterns and Raman spectra for two anatase/brookite (TiO2)-based nanocomposites with carbon (C) was carried out and the results compared with those of a similar sample free of carbon. The crystal structures and microstructures of anatase and brookite, as well as their relative abundance ratio, have been refined from XRPD data by the Rietveld method (the low amount of carbon is neglected). The XRPD size-strain analysis resulted in reliable structure and microstructure results ...Materials Chemistry, Metals and Alloys, Atomic and Molecular Physics, Optics, Electronic, Optical and Magnetic MaterialsAleksandar Kremenović, Mirjana Grujić-Brojčin, Nataša Tomić, Vladimir Lazović, Danica Bajuk-Bogdanović, Jugoslav Krstić, Maja Šćepanović. "Size–strain line-broadening analysis of anatase/brookite (TiO2)-based nanocomposites with carbon (C): XRPD and Raman spectroscopic analysis" in Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials, International Union of Crystallography (IUCr) (2022). https://doi.org/10.1107/S2052520622001731
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Application of rough set theory for choosing optimal location for flotation tailings dump
Štirbanović Zoran, Miljanović Igor, Marković Zoran. "Application of rough set theory for choosing optimal location for flotation tailings dump" in Archives of Mining Sciences 58 no. 3, -:Polish Academy of Sciences - Committee of Mining (2013): 893-900. https://doi.org/10.2478/amsc-2013-0062
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Results of the promethee method application in selecting the technologycal system at the Majdan III open pit mine
Vujić Slobodan, Hudej Marjan, Miljanović Igor. "Results of the promethee method application in selecting the technologycal system at the Majdan III open pit mine" in Archives of Mining Sciences 58 no. 4, -:Polish Academy of Sciences - Committee of Mining (2013): 1229-1240. https://doi.org/10.2478/amsc-2013-0084
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Assessment of risks associated with the operation of the tailings storage facility Veliki Krivelj, Bor (Serbia
Nišić Dragana, Knežević Dinko, Lilić Nikola. "Assessment of risks associated with the operation of the tailings storage facility Veliki Krivelj, Bor (Serbia" in Archives of Mining Sciences 63 no. 1, Krakow:Polish Academy of Sciences, Committee of Mining (2018): 147-163. https://doi.org/10.24425/118892
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New data for the geochemical determination of the solar pp-neutrino flux by means of lorandite mineral
Pavićević Miodrag, Bosch F., Amthauer Georg, Aničin Ivan, Boev Blažo, Brüchle W., Faesterman, T., Henning W.F., Jelenković Rade, Pejović Vladan, Djurčić Zoran (2010)Pavićević Miodrag, Bosch F., Amthauer Georg, Aničin Ivan, Boev Blažo, Brüchle W., Faesterman, T., Henning W.F., Jelenković Rade, Pejović Vladan, Djurčić Zoran. "New data for the geochemical determination of the solar pp-neutrino flux by means of lorandite mineral" in Nuclear Inst. and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment A621 (2, Amsterdam, Netherlands:Elsevier (2010): 278-285. https://doi.org/10.1016/j.nima.2010.06.090
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Risk assessment of flooded equipment revitalization on opencast coal mine Tamnava-West Field
Natalija Pavlović, Dragan Ignjatović, Stevan Đenadić, Tomislav Šubaranović, Ivica Jakovljević (2021)Natalija Pavlović, Dragan Ignjatović, Stevan Đenadić, Tomislav Šubaranović, Ivica Jakovljević. "Risk assessment of flooded equipment revitalization on opencast coal mine Tamnava-West Field" in Thermal Science, National Library of Serbia (2021). https://doi.org/10.2298/TSCI210615240P
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The deterministic fuzzy linear approach in planning the production of mine system with several open pits
Vujić Slobodan, Miljanović Igor, Kuzmanović Marija, Zoran Bartulović, Gajić Grozdana, Lazić Predrag (2011)Vujić Slobodan, Miljanović Igor, Kuzmanović Marija, Zoran Bartulović, Gajić Grozdana, Lazić Predrag. "The deterministic fuzzy linear approach in planning the production of mine system with several open pits" in Archives of Mining Sciences 56 no. 3, -:Polish Academy of Sciences - Committee of Mining (2011): 489-497. https://doi.org/-
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Компарација метода XRF i ICP-MS на узорцима угља и продуктима сагоревања
Бранко Костић, Ксенија Ераковић, Дејан Прелевић, Сабина Ковач, Драгана Животић. "Компарација метода XRF i ICP-MS на узорцима угља и продуктима сагоревања" in Записници Српског геолошког друштва (2023)