Претрага
99 items
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Productivity improvement with use of beam gas compressor: pilot test in Southeastern Europe mature field
Most of the wells in the oilfield Turija are operating with sucker rod pumps, where casing pressure at around 15 bar, and with marginal production rates. The high value of casing pressure indicates high pressure on the face of the formation and depends directly on well productivity. In addition, with increasing value of the casing pressure gas column in the annulus is moving the dynamic fluid level near pump intake and more gas is entering the pump, it results ...beam gas compressor, BGC, increase productivity, sucker rod pump, SRP, mature field, artificial lift, production optimisationBojan Martinović, Dušan Danilović, Branko Grubač, Robert Fadiga. "Productivity improvement with use of beam gas compressor: pilot test in Southeastern Europe mature field" in International Journal of Oil Gas and Coal Technology (2022)
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Double traveling valve increases rod-pump efficiency
Traditional sucker rod pumps (SRP) use a single traveling valve, but recent double traveling valve innovations have improved SRP performance and efficiency in field applications with double traveling valves installed in pumps with top mechanical seating. The valves sealed better and produced similar fluid volumes compared with the previous single-valve pumps. They also enabled a reduction in pump diameter and optimized usage of surface equipment. Overall, the double travel valve SRPs produced stable production rates and annual production targets.Miloš Petrović, Bojan Martinović, Milica Ješić, Miroslav Crnogorac. "Double traveling valve increases rod-pump efficiency" in Oil & Gas Journal (2023)
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Linear-motor plunger pump increases lifting efficiency
Bojan Martinović, Dušan Đekić, Dušan Danilović, Pavel Isaev. "Linear-motor plunger pump increases lifting efficiency" in Oil & Gas Journal (2022)
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Одређивање оптималне производње дубинске пумпе на клипним шипкама
Небојша Савић (2024)Дужи временски период током историје производње нафте, дубинске пумпе на клипним шипкама су први и у многим случајевима једини избор када су у питању механичке методе експлоатације. Правилан одабир сваког појединачног елемента система омогућава оптимизацију која са собом повлачи бенефите у виду повећавања ефикасности и смањења трошкова. Тренутно примењени систем дубинских пумпи на клипним шипкама на лежишту „Н“ обезбеђује стабилну производњу и реализацију годишњих планова производње без већих проблема. У овом раду је приказан начин оптимизације производње дубинским пумпама ...... land.htm (12.04.2024.) 7. Takacs, G., 2015. Sucker-rod Pumping handbook: Production Engineering Fundamentals and Long-Stroke Rođ Pumping, University of Miskolc, Hungary 8. PETROTEC/Downhole pump Five Basic Components of a Sucker Rod Pump, URL: http://pgp.co.id/products/Downhole_Equiom ...
... TIIHJIHHJ1Ipa Ca TaHKHM 3HJIOM (thin-wall). = Cauka 3.2. IIpukas uununopa ca ojaudaHuM u maHKUM 3u0O0M ( PETROTEC/Downhole pump Five Basic Components of a Sucker Rod Pump, URL: http:/pgp.co.id/products/Downhole_Equioment_Products.html ) TiamanynpaH ca ojaudaHHM 3HJIOM HMaJy JeOJbHHy 3HJla IHJTHHJipa ...
... ucts.html (14.04.2024.) 45 9. Takacs, G,. 1993. Modem Sucker-rod Pumping, University of Miskolc, Hungary 10. Production · Technology/API Subsurface Pump Designation URL: https://production-technology.org/api-subsurface-pump-designation/ (17.04.2024.) 11. LUFKIN DON NAN, URL: https://www ...Небојша Савић. Одређивање оптималне производње дубинске пумпе на клипним шипкама, 2024
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Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic
Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković (2020)Artificial lift methods have applications in oil wells where oil production is no longer possible due to natural reservoir energy, so this necessary energy is added by introducing lift methods. In order to achieve optimum production, the selection of an artificial lift method is very important. This paper uses fuzzy logic as a mathematical and conceptual model for selection of the optimal artificial lift method. The outcome or IF-THEN rules, as the central part of the model, is based ...... depletes, artificial lift methods are applied. The most common of these are: gas lift (GL), sucker rod pumps (SRP), electric submersible pumps (ESP), progressive cavity pumps (PCP), and hydraulic jet type pump (HP) [1]. The selection of the artificial lift method is one of the most important process ...
... depletes, artificial lift methods are applied. The most common of these are: gas lift (GL), sucker rod pumps (SRP), electric submersible pumps (ESP), progressive cavity pumps (PCP), and hydraulic jet type pump (HP) [1]. The selection of the artificial lift method is one of the most important process ...
... overlapping of the electric submersible pumps (ESP) standard with a new well, (d) overlapping of the sucker rod pumps (SRP) standard with a new well, (e) overlapping of the hydraulic jet type pump (HP) standard with a new well, (f) overlapping of the progressive cavity pumps (PCP) standard with a ...Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković. "Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic" in Energies, MDPI AG (2020)
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Evaluation of the effects of wastewater heat pump integration into district heating systems by simulation
Dejan Ivezić, Marija Živković, Dimitrije Manić, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović (2023)The integration of wastewater heat pumps (using purified water) in district heating systems is analyzed in this paper. The simulation procedure is proposed to analyze the impacts of stochasticity of purified water temperature and flow to heat pump integration and operation. The analysis includes calculation of the daily and seasonal coefficient of performance, as well as fossil fuel savings and CO2 emission reduction due to wastewater heat pump use. The proposed procedure is implemented for the case study in ...Dejan Ivezić, Marija Živković, Dimitrije Manić, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović. "Evaluation of the effects of wastewater heat pump integration into district heating systems by simulation" in Thermal Science, National Library of Serbia (2023). https://doi.org/10.2298/TSCI220813168I
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Convective heat transfer in centrifugal pumps lifted wells: the case of South-Eastern Europe waxy wells
Electric submersible pumps (ESP) are applied in wells where additional energy is needed to ensure discharge of the fluid to the surface through the tubing. At the discharge side of the pump the fluid has bigger velocity, thus the pump induces a forced convection between the fluid and the tubing inner surface. Understanding of convective heat transfer in wellbores and analyses of influential parameters provides a possibility to optimise value of convective heat transfer coefficient in order to avoid ...Bojan Martinovic, Marija Živković, Branko Grubač. "Convective heat transfer in centrifugal pumps lifted wells: the case of South-Eastern Europe waxy wells" in International Journal of Oil, Gas and Coal Technology, Inderscience Publishers (2021). https://doi.org/10.1504/IJOGCT.2021.10043281
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Challenges in using wastewater heat pumps in district heating systems
Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović, Dimitrije Manić (2022)Decarbonization of district heating systems requires ensuring significant amounts of renewable energy available in the proximity of the district heating network. One of the promising solutions is the utilization of purified water from wastewater treatment plants by heat pumps. However, as a heat source, wastewater treatment plants are characterized by annual variability of the flow and temperature of purified water. The consequence is the variability of recoverable heat potential. In this paper, the effect of variability is analyzed for ...Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović, Dimitrije Manić. "Challenges in using wastewater heat pumps in district heating systems" in 20th International Conference on Thermal Science and Engineering of Serbia, Niš, Serbia, October 18 – 21, 2022, Faculty of Mechanical Engineering in Niš (2022)
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Innovative solution for the pump impeller shaft sealing
Batalović Veselin (2012)Batalović Veselin. "Innovative solution for the pump impeller shaft sealing" in Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering November 2012 226 no. 4 (2012): 263-271. https://doi.org/10.1177/0954408911425886
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Hydraulic lift systems with piston type pump
Veselin Batalović, Dušan Danilović, Vesna Karović-Maričić . "Hydraulic lift systems with piston type pump" in Journal of Petroleum Science and Engineering 78 (2011): 267-273
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Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability
Marija Živković, Dejan Ivezić (2021)Transformation of the heating sector is recognized as being essential for ensuring reliable and afordable energy services provided with reduced consumption of energy sources and diminished impact on the environment and less import dependency. The possibility of utilizing energy sources that otherwise would be wasted needs to be considered and treated as a big advantage of district heating systems. Despite many advantages, sewage wastewater heat is still a mostly unused resource at the global level and a totally unused ...рекуперација топлоте из отпадних вода, систем даљинског грејања, топлотне пумпе, енергетске уштеде, емисија угљендиоксида, енергетска безбедност, Србија... were identified: (a) Heat pump placement into the existing network without major changes, (b) heat pump placement in an expanded network, (c) deep refurbishment of the existing district heating system, and (d) the design of a new district heating system supplied by a heat pump. By implementing one of ...
... cities (Lu et al. 2020). Selection of an appropriate heat pump is strongly driven by characteristics of available heat source. Besides selection of the appropriate heat pump technology, the heat source has influence on the placement of the heat pump unit, connection and operational modes, appropriate ...
... simulated to explore how increasing the share of heat pump production influences DH systems. Data on heat pump performance in an Olympic village in Vancouver are given in Fiore and Genon (2014). Technical data and analyses of effectiveness of a heat pump installa- tion in Vladivostok are discussed in Alekseiko ...Marija Živković, Dejan Ivezić. "Utilizing sewage wastewater heat in district heating systems in Serbia: effects on sustainability" in Clean Technologies and Environmental Policy, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s10098-021-02063-6
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Paleontološke karakteristike i biostratigrafski značaj rudistnog senonskog roda pseudopolyconites Milovanović
Mileva Sladić-Trifunović (1980)Mileva Sladić-Trifunović. Paleontološke karakteristike i biostratigrafski značaj rudistnog senonskog roda pseudopolyconites Milovanović, Beograd:Rudarsko Geološki Fakultet, 1980
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Morfološke paleoekološke i biostratigrafske odlike roda clypeaster(Echinoidea) iz neogenskih sedimenata Bosne i Srbije
Marina Dimić (1997)Marina Dimić. Morfološke paleoekološke i biostratigrafske odlike roda clypeaster(Echinoidea) iz neogenskih sedimenata Bosne i Srbije, Beograd:Rudarsko-geološki fakultet, 1997
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Mikrobiološki diverzitet kiselog jezera Robule i uticaj jezerske vode na oksidaciju sulfidnih minerala
Srđan B. Stanković (2016-09-11)Jezero Robule, formirano u podnožju rudničke raskrivke Oštreljski planir (Rudnik bakra Bor), je nastalo kao posledica rudarskih aktivnosti. Mikrobiološki diverzitet ekstremno kiselog jezera Robule ispitivan je primenom kako klasičnih mikrobioloških metoda (svetlosna mikroskopija i kultivacija na selektivnim podlogama) tako i primenom savremene metode molekularne biologije (analiza polimorfizama terminalnih restrikcionih fragmenata; T-RFLP). Takođe, ispitivan je i potencijal i efikasnost jezerske vode u biološkom luženju mineralnog koncentrata, kao i u bioluženju uzoraka stare flotacijske jalovine Rudnika bakra Bor.Na osnovu dobijenih rezultata ...... 1996). Sve vrste koje pripadaju ovom rodu su fakultativni anaerobi. 1.4.7.4 Rod Sulfobacillus Bakterije iz roda Sulfobacillus su svrstane u razdeo Firmicutes: Gram-pozitivne sporogene bakterije. Do sada su identifikovane četiri vrste bakterija u okviru ovog roda: S. thermosulfidooxidans, S. acidophilus ...
... 2003). 1.4.7.5 Rod Alyciclobacillus Rodu Alyciclobacillus (razdeo Firmicutes) pripadaju gram pozitivne, umereno termofilne, heterotrofne, sporogene acidofilne bakterije filogenetski bliske rodu Sulfobacillus. Identifikovano je 18 vrsta bakterija koje pripadaju ovom rodu (Cheng- Ying et al ...
... prisutvo heterotrofnih bakterija koje su filogenetski bliske rodu Acidiphilium, odnosno rodovima Acidiphilium i Acidisphaera, dok preostalih 20 % i 30 % sekvenci većinom ukazuje na prisutvo bakterija srodnih rodu Leptospirillum, odnosno rodovima Bacillus i Legionella. Falagan et al. (2013) su ispitivali ...Srđan B. Stanković. "Mikrobiološki diverzitet kiselog jezera Robule i uticaj jezerske vode na oksidaciju sulfidnih minerala" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-09-11)
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Mikroorganizmi - biohidrogeološki indikatori odabranih pojava mineralnih voda Srbije
Vladimir Šaraba (2021)Sa namerom definisanja hidrogeološke uloge i značaja mikrobiološkog diverziteta odabranih pojava mineralnih voda Srbije, primenom sistema biodetektora, dokazano je prisustvo gvožđevitih, sulfato-redukujućih, sluz-produkujućih, heterotrofnih aerobnih i denitrifikacionih bakterija, na osnovu čega je proračunat rizik od razvoja procesa biokorozije i biohemijske inkrustacije, te zdravstveni rizik. Uz procenu rizika, izvedene su analize skenirajuće elektronske mikroskopije biofilmova i hidrogeohemijsko modeliranje, te makroskopska, otpička i difrakciona ispitivanja naslaga inkrustacije, dok je fizičko-hemijskim analizama utvrđena vrednost ukupne mineralizacije iznad 1 g/L, kao i povišeni ...biohidrogeologija, SEM analize, makroskopska i optička ispitivanja, rendgenska difrakcija praha, hidrogeohemijsko modeliranje, BART analize, metabarkoding analize mikrobioma, fizičko-hemijske analize, starenje bunara (biokorozija, biohemijska inkrustacija i biozarastanje), zdravstveni rizik... i predstavnici rodova Aquifex i Thermotoga koji se razvijaju u termalnim izvorima blizu tačke ključanja, kao i štapićasti oblici roda Thermoanaerobacter, nitaste bakterije roda Isosphaera, te predstavnici roda Rhodothermus čiji temperaturni optimum iznosi 60°C. Posebno je značajan rod Rhothermus, budući ...
... , ii) sumpor-redukujuće bakterije (rod: Desulforomonas), iii) sumpor-oksidujuće bakterije (rod: Thiobacillus) i iv) bezbojne sumporne bakterije (rodovi: Beggiatoa, Thiotrix) (Cullimore, 1999). Sulfato-redukujuće bakterije predstavljaju jedinstvenu grupu organizama, budući da za životne aktivnosti koriste ...
... je, transofrmacije arsena, itd. (Sonthiphand et al., 2019). Takođe, u mikroflori podzemnih voda uobičajne su bakterije roda Pseudomonas, kao i bakterije roda Acinetobacter i roda Alcaligenes. Ostale grupe, poput Caulobacter, Cytophaga, Flexibacter i Flavobacteria uglavnom su zastupljene u izdanima ...Vladimir Šaraba. Mikroorganizmi - biohidrogeološki indikatori odabranih pojava mineralnih voda Srbije, Beograd : [V. Šaraba], 2021
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Neogena i kvartarna herpetofauna (Anura i Squamata) Srbije : doktorska disertacija
Dragana D. Đurić (2019)U radu je prvi put opisan deo herpetofaune (Anura i Squamata) iz neogenih i kvartarnih lokaliteta Srbije. Obrađeni su lokaliteti Sibnica, Prebreza, Lazarevc, Vračević i Riđake, neogene starosti. Lokaliteti kvartarne starosti su pećine Mala i Velika Balanica, Pešturina, Hadži Prodanova, Baranica, Vrelska pećina i sedimentne ispune fisura u kamenolomima Venčac i Beočin. U radu je prikazana je taksonomska analiza herpetoloških ostataka. Pored taksonomske analize fosilnog materijala dat je kratak geografsko-geološki opis proučavanih lokaliteta, osnovne osteološke karakteristike anura i skvamata ...... malih razlika (ne samo ilijuma) unutar roda Pelophylax (Blain et al. 2015a; Roček 2013), ovi fragmenti nisu određivani do nivoa vrste. Sl. 44 Pelophylax sp. (VRA), fragment ilijuma. Rod Pelophylax dugo je pripadao rodu Rana, ali su na osteološkom materijalu ...
... koje su još ranije opisivali kao dva tipa roda Rana (Holman 1965; Sanchiz 1977). Ključne razlike u građi iliuma kod ova dva roda su prikazana u tabeli 2. i slici 45. 69 Sl. 45. Razlike ilijuma rodova Rana i Pelophylax: 1) Pelophylax ridibundus ...
... herpetofauna miocena obuhvata pet vrsta, devet rodova i sedam familija iz pet lokaliteta (tabela 7). Od ovog broja, jedan rod (Palaeobatrachus) i tri vrste su izumrle (Latonia gigantea, Pseudopus cf. P. laurilardi, Pseudopus cf. P. pannonicus). Rodovi Agama i Varanus, kao i familije Chamaeleonidae ...Dragana D. Đurić. Neogena i kvartarna herpetofauna (Anura i Squamata) Srbije : doktorska disertacija, Beograd : Rudarsko-geološki fakultet, 2019
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Badenske školjke jugoistočnog oboda Panonskkog basena (Centralni Paratetis)
Gordana M. Jovanović (2014-12-05)Rad obuhvata detaljnu studiju badenskih školjaka koje potiču sa terenajugoistočnog oboda Panonskog basena (Centralni Paratetis). Proučavani su lokaliteti naprostorima Srbije (Fruška gora, Golubac, okolina Beograda, Aranđelovca, Koceljeva,Loznica) i severoistočne Bosne (Ugljevik). Pored taksonomske analize i paleontološkihopisa bivalvija, u radu je dat i spisak revidovanih vrsta koje su do sada pronađene usedimentima badenskog kata istraživanog terena. Do sada je ukupno poznato 41familija, 108 rodova i 174 taksona. Identifikovano je 170 bivalvijskih vrsta, međukojima su neke prvi put konstatovane na ovim ...školjke, baden, Panonski basen (Centralni Paratetis), stratigrafija,paleoekologija, paleogeografija, paleobiogeografija... satu, što je odlika roda Chama ili u pravcu kazaljke na satu što je odlika roda Pseudochama (Yonge, 1967). Međutim, sve druge karakteristike ukazuju da primerak pripada rodu Pseudochama. U radovima publikovanim posle Lindera (1999), Pseudochama se opisuje samo kao podrod roda Chama (iz Höltke, ...
... pripisivani različitim vrstama, pa čak i rodovima. Mörch (1852-53) uvodi Botula kao podrod Lithophaga Röding, 1798. Vilson i Tait (1984) smatraju da rod Botula ima jednu vrstu (Botula fusca). Nasuprot tome (Kleemann, 2007) smatra da postoji više vrsta roda Botula. Nalazište: Golubac (Vojilovo) ...
... da bi kasnije bila svrstana u rod Quadrans Thiele (1934). Glibert i Van de Poel (1967) izdvajaju tri roda za familiju Tellinidae: Acropagia Brown, 1827, Angulus Megerel von Mühlfeld, 1811 i Quadrans Bertin, 1818. Studencka i Zieliňski (2013) je svrstavaju u rod Serratina. Nalazište: Golubac ...Gordana M. Jovanović. "Badenske školjke jugoistočnog oboda Panonskkog basena (Centralni Paratetis)" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2014-12-05)
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Mogućnost korišćenјa toplotnih pumpi sa otpadnom toplotom iz postrojenјa za prečišćavanјe otpadnih voda kao toplotnim izvorom
U narednom periodu se planira izgradnja nekoliko desetina sistema za prečišćavanje otpadnih voda u većim gradovima u Srbiji. Iskustva iz postrojenja koja su trenutno u radu, pokazuju da bi prečišćena otpadna voda, s obzirom na protok i temperaturu, mogla da predstavlja značajan izvor obnovljive energije. U radu su prikazani primeri dobre prakse korišćenja ove energije u sistemima daljinskog grejanja u zemljama Evropske unije. Analiziran je rad postrojenja za prečišćavanje otpadnih voda u Šapcu i razmotrena je mogućnost njegovog korišćenja ...... Roadmap Europe, https://heatroadmap.eu/ [pristupljeno 15.01.2021] [3] Research Institutes of Sweden (RISE), Heat Pump Centre (2019), Heat Pumps in District Heating and Cooling Systems, Heat Pump Centre, Borås, Sweden, https://heatpumpingtechnologies.org/publications/heat-pumps-in- district-heating-and ...
... plant in the city of Šabac was analysed and the possibility of its use in the local district heating system was considered. Index terms - heat pump, district heating systems, wastewater treatment plant I UVOD oplotna pumpa je uređaj je uređaj koji toplotu prenosi sa toplotnog rezervoara niže ...Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Boban Pavlović. "Mogućnost korišćenјa toplotnih pumpi sa otpadnom toplotom iz postrojenјa za prečišćavanјe otpadnih voda kao toplotnim izvorom" in Energija, Ekonomija, Ekologija, University Library in Kragujevac (2021). https://doi.org/10.46793/EEE21-1.11I
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Hydrodynamic analysis application of contaminated groundwater remediation to oil hydrocarbons
U ovom radu sagledana je primena hidrodinamičke analize u okviru odabrane remedijacione metode ,,pumpanja i tretiranja” kontaminiranih podzemnih voda ugljovodonicima, na primeru pretakališta rafinerije nafte u Pančevu. Primenjena hidrodinamička analiza predstavlja pravilan, a sve češće i neophodan pristup u savremenoj hidrogeologiji. Prethodnim hemijskim analizama uzoraka tla i podzemnih voda na istražno-osmatračkim objektima detektovano je zagađenje produktima nafte. Novoizvedena istraživanja obuhvatila su izvođenje 12 pijezometara različitih dubina, geoelektrično sondiranje tla, ,,in situ” merenja prisutnog kontaminanta, izdvojenog kao hidrofobna faza LNAPL, ...Predrag Pajić, Aleksandar Čalenić, Dušan Polomčić, Dragoljub Bajić. "Hydrodynamic analysis application of contaminated groundwater remediation to oil hydrocarbons" in Tehnika, Centre for Evaluation in Education and Science (CEON/CEES) (2018). https://doi.org/10.5937/tehnika1706825P
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An oilfield in Libya: A new model to enhance waste water disposal
Dušan Danilović, Vesna Karović Maričić, Nori Elhaddad, Branko Leković. "An oilfield in Libya: A new model to enhance waste water disposal" in Energy & Environment (2016)