Nodirbek Kobilov

@academy.uz

Oil and Gas chemistry
Institute of General and Inorganic Chemistry of Academy Sciences of the Republic of Uzbekistan

Nodirbek Kobilov


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https://researchid.co/nodirbekdoc

RESEARCH, TEACHING, or OTHER INTERESTS

Mechanics of Materials, General Chemical Engineering, Geotechnical Engineering and Engineering Geology, Environmental Engineering
13

Scopus Publications

997

Scholar Citations

12

Scholar h-index

16

Scholar i10-index

Scopus Publications

  • Investigation and study of oil sludge of oil refinery company in Uzbekistan
    Nodirbek Kobilov, Bosit Khamidov, Khudoyor Rakhmatov, Mirzokhid Abdukarimov, Oybek Daminov, et al.
    Aip Conference Proceedings, 2025
  • Development of effective chemicals for drilling fluid based on local and raw materials of Uzbekistan
    Nodirbek Kobilov, Bosit Khamidov, Khudoyor Rakhmatov, Oybek Daminov, Sayyora Ganieva, et al.
    Aip Conference Proceedings, 2025
  • Development of effective chemicals for drilling fluid based on local and raw materials
    Nodirbek Kobilov, Bosit Khamidov, Khudoyor Rahmatov, Tashmurza Yuldashev, Sharifov Gulomjon, et al.
    Nafta Gaz, 2025
    The paper presents the current state of chemical reagents used in the development and production of drilling fluids for oil and gas well drilling, based on local and raw materials from Uzbekistan. A novel and effective chemical reagent, MBR (drilling fluid lubricant), has been obtained from gossypol resin, a by-product of cotton oil production. Types of weighted water-based drilling fluids using bentonite, carboxymethylcellulose (CMC), MBR (Moylovchi burg'ilash reagent), barite, and hematite and their physical and chemical properties were investigated. Methods for testing drilling fluid properties were studied, and the compositions and contents of chemical reagents and weighting agents for the preparation of weighted drilling fluids have been provided. The water-soluble modified powdery resin contains hydrophobic additives based on sodium salt of fatty acids and ionic surfactants. The use of these reagents in drilling fluids for oil and gas wells ensures the preservation of regulated rheological and filtration properties of polymer systems at 80–190°C for 30–40 hours. A method for obtaining new effective chemical reagents based on the physical and chemical modification of initial materials under various ratios, environments, and regimes has been developed. The requirements for chemical reagents and weighting agents according to geological conditions of oil and gas boreholes have been studied. A new formulation of weighted drilling fluids based on MBR, barite, and hematite using salt water with densities of 2.15 and 2.41 g/cm3 has been developed and recommended for use in oil and gas well drilling. The application of these research results is expected to increase the lubricity of drilling fluid due to the use of the MBR lubricant, enhance the mechanical speed of drilling, and can help address certain ecological problems in the country through the utilization of cotton oil and fat production waste.
  • An express assessment of the technical condition of an oil-filled power transformer using a simulation model based on the vibroacoustic parameters of the transformer tank
    Ibrokhimjon Ismoilov, Bekzod Boynazarov, Mirsoli Uzbekov, Dilmurod Yusupov, Iqboljon Zoxidov, et al.
    E3s Web of Conferences, 2024
    Oil power transformers are the main device that ensures the reliability of power distribution in the electric power network. It is the only device for connecting electric power rings of any voltage. Long-term reliable operation of oil power transformers has a direct impact on the power system and can sometimes lead to accidents. The technical condition of oil power transformers depends on the technical parameters of their main components. In this paper, the results obtained in the oil power transformer tank under operating conditions, the generation theory and the simulation model are analyzed. As a result, an express evaluation of the technical condition of oil power transformers was carried out.
  • Increases in the volume of ore loss in ore pillars as the mine deepens
    Shadiboy Hakimov, Olimjon Kobilov, Shukhrat Tadjiev, Sirojiddin Khamzayev
    E3s Web of Conferences, 2023
    The article discusses the increase in ore loss in mining systems with natural maintenance pillars of the developed space, which cannot be extracted in conditions of high concentration of stress after development of reserves. The main directions of increasing the efficiency of traditional systems for the development of vein deposits are shown.
  • Classification of systems for opening reserves beyond the limit contour of the quarry of upland deposits
    Shukhrat Tadjiev, Olimjon Kobilov, Erkinjon Sharopov, Jurabek Choriyorov, Abdugoffor Bahriddinov
    E3s Web of Conferences, 2023
    The article considers the systems of opening the contiguous reserves of upland deposits and develops their classification. Proposed classification takes into account the development of both portside and sub-quarry reserves in an open-underground way using the quarry space. Opening workings of sub-quarry reserves are carried out outside the boundaries of the quarry.
  • New composition of chemicals and heavy drilling fluids for drilling oil and gas wells
    Nodirbek Kobilov, Bosit Khamidov, Abror Shukurov, Sarvar Kodirov, Kuvonchbek Juraev
    E3s Web of Conferences, 2023
    The article shows the importance of obtaining new composition of heavy drilling fluids based on composite chemical reagents from local raw materials and industrial wastes for drilling oil and gas wells. In the process of building oil and gas wells to maintain the stability of the walls, to prevent the flow of salts, and to prevent the penetration of formation fluids into the well, it becomes necessary to increase the density of the drilling fluid, which can be accomplished by introducing components with increased density. For obtaining and stabilization heavy drilling fluid were investigated and recommended new compositions of powder water soluble gossypol resin and carboxymetylcellylose sodium and other minerals. Stabilization indexes and their determination in the drilling process of oil and gas wells have been investigated. The result of research have been implemented in the drilling process of oil and gas wells with abnormally high reservoir pressure.
  • Laboratory research of coal briquette quality indicators
    Khasan Kobilov
    Iop Conference Series Earth and Environmental Science, 2022
    The research is based on the results of scientific research on the development of technology for the production of high-energy and environmentally friendly coal briquettes.The study of crushing of different sizes of coal, as well as the study of separation processes on the geometric size of the fine fraction of coal revealed high efficiency of hammer grinders and multi-layer screening devices for sorting, based on the consistency of briquette constituents, a technological system for the production of briquettes based on the use of a solution of biohumus and rice starch as effective biobinders, providing effective interaction of coal particles. The strength of briquettes obtained by increasing the amount of starch solution in coal compounds by 2%, 4%, 6% is 1.3-1.5 times, and when the pressing pressure is increased from 5 MPa to 40 MPa, the average strength of briquettes is from 2.8 MPa to 6.4 MPa. increase was detected.
  • Patterns of causation in accidents and other systems engineering failures
    Diane Sorenson, Karen Marais
    10th Annual International Systems Conference Syscon 2016 Proceedings, 2016
    Project failures occur despite the industry's best systems engineering efforts. Detailed information on project failures is difficult to find, which makes it difficult to study or understand their causes and hence to identify ways to prevent future failures. In contrast, many accidents have extensive investigations with public reports. To determine whether lessons from accidents can also be used to prevent other types of failures, we compared the causes of accidents and project failures. Our sample consisted of 30 accidents and 32 non-accidents, ranging across various industries. We extracted causes from the reports on accidents and project failures, and analyzed these causes by framing them in a common "actor-action-object" structure. We discarded the details particular to each failure (e.g., the particular component that was affected) to allow us to focus on the underlying problem (e.g., components were not properly maintained). Next, we extracted the particular actions involved in each cause (e.g., failed to maintain). Ten, or just under half of the 22 problematic actions we identified were equally likely to appear in accidents or project failures (95% confidence interval). Of the remaining twelve actions, the majority can be reasonably attributed at least in part to differences in investigation style between accidents and non-accidents. Some differences occur because of when accidents and non-accidents tend to happen. Poor maintenance was rarely an issue in non-accidents, because most project failures occur long before maintenance becomes a concern. Finally, actions involving regulations, procedures, or training were cited more often in accidents, reflecting the greater number and extent of regulations, procedures, or training related to safety.
  • Structure and properties of viscous gossypol resin powder
    K. S. Negmatova, S. S. Negmatov, Y. A. Salimsakov, H. Y. Rakhimov, J. N. Negmatov, et al.
    Aip Conference Proceedings, 2012
    The structure and properties of a viscous gossypol resin is analyzed together with the effective mechanism of for stabilization of the drilling fluids used in drilling oil wells.
  • Effective composite chemical reagents based on organic and inorganic ingredients for drilling fluids used in the process of drilling oil wells
    Komila Negmatova, Shodilbek Isakov, Nodir Kobilov, Malika Negmatova, Jakhongir Negmatov, et al.
    Advanced Materials Research, 2012
  • Research and development of manufacture technology of polymeric composite materials of electrotechnical purpose filled with hydrolytic lignin
    S. S. Negmatov, Yu. A. Salimsakov, B. B. Sobirov, N. S. Kobilov, K. S. Negmatova, et al.
    Aip Conference Proceedings, 2008
  • Esters of Ferula leucographa structure of leucoferin
    M. N. Kobilov, A. I. Saidkhodzhaev, N. D. Abdullaev
    Chemistry of Natural Compounds, 1995

RECENT SCHOLAR PUBLICATIONS

  • MOYLOVCHI MATERIALLAR UCHUN SIRT FAOL MAODDALAR TARKIBI VA TEXNOLOGIYASI
    NS Qobilov, SJ Ergashev
    Sanoatda raqamli texnologiyalar 4 (1) , 2026
    2026
  • Effective surfactants and lubricants for drilling fluids
    NS Kobilov, JT Olimov, SJ Ergashev, A Serodjayev, Y Kosimova
    БГТУ , 2026
    2026
  • RESEARCH OF THE ADSORPTION MECHANISMS FOR PURIFYING USED MOTOR OILS.
    N Kobilov, S Ergashev, J Olimov, E Dustmurodov
    Austrian Journal of Technical & Natural Sciences, 112 , 2026
    2026
  • TECHNOLOGY FOR OBTAINING CHEMICAL REAGENT FOR DRILLING FLUIDS BASED ON LOCAL RAW MATERIALS.
    N Kobilov, J Olimov, E Dustmurodov, S Ergashev, Y Qosimova
    Austrian Journal of Technical & Natural Sciences, 131 , 2026
    2026
  • YOG ‘-MOY SANOATI CHIQINDILARINING FIZIK-KIMYOVIY XUSUSIYATLARI VA ULAR ASOSIDA SIRT FAOL MODDALAR ISHLAB CHIQISH
    QN Sobirovich, TAA Ikromogli, OJ To‘Lqinogli, ES Jamabayevich
    Sanoatda raqamli texnologiyalar/Цифровые технологии в промышленности 4 (1 … , 2026
    2026
  • Maqola
    NS Kobilov
    SRT 1 (1), 1 , 2026
    2026
  • Optimization of Approximate Integration Formulas for Periodic Function Classes
    MK Shadimetov, SS Azamov, HM Kobilov
    Проблемы вычислительной и прикладной математики, 116-124 , 2025
    2025
  • Development of effective chemicals for drilling fluid based on local and raw materials of Uzbekistan
    N Kobilov, B Khamidov, K Rakhmatov, O Daminov, S Ganieva, ...
    AIP Conference Proceedings 3304 (1), 040077 , 2025
    2025
    Citations: 1
  • Investigation and study of oil sludge of oil refinery company in Uzbekistan
    N Kobilov, B Khamidov, K Rakhmatov, M Abdukarimov, O Daminov, ...
    American Institute of Physics Conference Series 3304 (1), 040076 , 2025
    2025
  • STUDY OF CATALYSTS PREPARED BY IMPREGNATION WITH AQUEOUS COBALT NITRATE SOLUTION.
    NS Kobilov
    Austrian Journal of Technical & Natural Sciences , 2025
    2025
    Citations: 1
  • Development of effective lubricants for drilling fluids
    KN Sobirovich
    Austrian Journal of Technical and Natural Sciences, 90-93 , 2024
    2024
    Citations: 2
  • The ways of obtaining weighted drilling fluids based on lubricants for drilling oil and gas wells
    KN Sobirovich
    Austrian Journal of Technical and Natural Sciences, 94-97 , 2024
    2024
    Citations: 1
  • Development of new chemical reagent based on local and raw materials for oil and gas industry
    Н Кобилов, Б Хамидов, А Шукуров, С Кодиров
    Зелёная химия и устойчивое развитие 1 (1), 203-204 , 2023
    2023
  • Study of Oil Sludge of Oil Refinery and Their Processing
    KN Sobirovich, KB Nabievich, SA Sharipovich, KS Azamatovich, S Gulom, ...
    Austrian Journal of Technical and Natural Sciences, 67-70 , 2023
    2023
    Citations: 2
  • РАЗРАБОТКА ПРОМЫШЛЕННОЙ ТЕХНОЛОГИИ ПОЛУЧЕНИЯ АМИДА ЖИРНЫХ КИСЛОТ ХЛОПКОВЫХ СОАПСТОКОВ
    АА Кадыров, НА Кадыров, МА Эшмухамедов, ММ Пазилов, ...
    Universum: технические науки, 49-52 , 2023
    2023
    Citations: 1
  • Разработка состава бурового раствора на основе вторичного фосфогипса
    АА Кадыров, ББ Алиханов, НА Кадыров, МА Эшмухамедов
    Universum: технические науки, 24-27 , 2023
    2023
    Citations: 2
  • ИННОВАЦИОННЫЕ РЕШЕНИЯ В ПРОМЫШЛЕННОЙ ИНЖЕНЕРИИ
    РВПИ ИННОВАЦИОННЫЕ
    МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ 113 (114), 0 , 2023
    2023
  • Comparative analysis using various performance metrics in imbalanced data for multi-class text classification
    S Riyanto, SS Imas, T Djatna, TD Atikah
    International Journal of Advanced Computer Science and Applications 14 (6) , 2023
    2023
    Citations: 125
  • КОАГУЛОПАТИЯ И МАРКЕРЫ НЕБЛАГОПРИЯТНОГО ИСХОДА
    ИВ Бергер, АД Махмудова, ОУ Ачилова, МИ Шамсутдинова, ...
    Ўзбекистон, Тошкент , 2023
    2023
  • INVESTIGATION OF PHYSICAL CHEMICAL PROPERTIES OF DRILLING FLUIDS FOR DRILLING OIL AND GAS WELLS
    K Nodirbek
    Austrian Journal of Technical and natural sciences, http//doi.org/10.29013 … , 2023
    2023

MOST CITED SCHOLAR PUBLICATIONS

  • Impact of climate change on wheat productivity in Central Asia
    R Sommer, M Glazirina, T Yuldashev, A Otarov, M Ibraeva, L Martynova, ...
    Agriculture, ecosystems & environment 178, 78-99 , 2013
    2013
    Citations: 271
  • Comparative analysis using various performance metrics in imbalanced data for multi-class text classification
    S Riyanto, SS Imas, T Djatna, TD Atikah
    International Journal of Advanced Computer Science and Applications 14 (6) , 2023
    2023
    Citations: 125
  • Climate change induced impact and uncertainty of rice yield of agro-ecological zones of India
    R Gupta, A Mishra
    Agricultural Systems 173, 1-11 , 2019
    2019
    Citations: 92
  • Impacts of 1.5 C and 2 C global warming on winter snow depth in Central Asia
    Y Li, H Tao, B Su, ZW Kundzewicz, T Jiang
    Science of the Total Environment 651, 2866-2873 , 2019
    2019
    Citations: 74
  • Construction and evaluation of sentiment datasets for low-resource languages: The case of Uzbek
    E Kuriyozov, S Matlatipov, MA Alonso, C Gómez-Rodríguez
    Language and Technology Conference, 232-243 , 2019
    2019
    Citations: 66
  • Assessing agricultural systems vulnerability to climate change to inform adaptation planning: an application in Khorezm, Uzbekistan
    M Aleksandrova, AK Gain, C Giupponi
    Mitigation and Adaptation Strategies for Global Change 21 (8), 1263-1287 , 2016
    2016
    Citations: 64
  • Climate change and sustainability of crop yield in dry regions food insecurity
    S Shayanmehr, S Rastegari Henneberry, M Sabouhi Sabouni, ...
    Sustainability 12 (23), 9890 , 2020
    2020
    Citations: 43
  • Nitrogen dynamics and nitrous oxide emissions in a long-term trial on integrated soil fertility management in Western Kenya
    R Sommer, J Mukalama, J Kihara, S Koala, L Winowiecki, D Bossio
    Nutrient cycling in agroecosystems 105 (3), 229-248 , 2016
    2016
    Citations: 37
  • Table of radionuclides (Vol. 4-A= 133 to 252)
    MM Bé, V Chisté, C Dulieu, E Browne, V Chechev, N Kuzmenko, ...
    2008
    Citations: 37
  • Structure and properties of viscous gossypol resin powder
    KS Negmatova, SS Negmatov, YA Salimsakov, HY Rakhimov, ...
    AIP Conference Proceedings 1459 (1), 300-302 , 2012
    2012
    Citations: 27
  • Precipitates of MnSi cubic phase in tetragonal Mn 4 Si 7 crystal
    EI Suvorova, VV Klechkovskaya
    Crystallography Reports 58 (6), 854-861 , 2013
    2013
    Citations: 20
  • Effective composite chemical reagents based on organic and inorganic ingredients for drilling fluids used in the process of drilling oil wells
    K Negmatova, S Isakov, N Kobilov, M Negmatova, J Negmatov, ...
    Advanced Materials Research 413, 544-547 , 2012
    2012
    Citations: 13
  • Composite chemical reagent for stabilization heavy mud for drilling salt-anhydrite layer of oil and gas wells
    NS Kobilov, KS Negmatova, XY Rakhimov
    Europaische Fachhochschule, 51-53 , 2016
    2016
    Citations: 11
  • An overview on desert aquaculture in Central Asia (Aral Sea drainage basin)
    B Karimov
    Aquaculture in desert and arid lands. Rome (Italy): FAO, 61-84 , 2011
    2011
    Citations: 11
  • Регулирование реологических свойств буровых растворов, стабилизированных полиакрилатами и полисахаридом
    РИ Исмоилов, ОА Шералиева, НА Кадыров, АА Кадыров
    Химическая безопасность 4 (1), 227-235 , 2020
    2020
    Citations: 10
  • Multi-Criteria Decision-Making Model for Evaluating Priorities for Foreign Direct Investment in Kashkadarya Region
    A Kobilov, K Oybek
    International Journal of Social Science and Economics Invention 6 (07), 310-315 , 2020
    2020
    Citations: 10
  • Adoption of durum wheat cultivar ‘salim’with a technical package and its resilience to climate change impacts in smallholders: case of Nebeur/Kef region, Tunisia
    S Ayed, S Mlouhi, I Bouhaouel
    Plants 10 (11), 2379 , 2021
    2021
    Citations: 9
  • The impact of investment on the economic development of Uzbekistan
    AE Kobilov, OA Kurbonov, AM Amirov, DK Usmanova
    Journal of Advanced Research in Dynamical and Control Systems 12 (7 Special … , 2020
    2020
    Citations: 7
  • Effect of early heading on yield and yield components of three Iranian wheat genetic backgrounds
    M Dorrani-Nejad, R Abdoshahi, A Kazemi Pour, AA Maghsoudi Moud
    Iranian Dryland Agronomy Journal 8 (2), 141-152 , 2020
    2020
    Citations: 6
  • Research and development of manufacture technology of polymeric composite materials of electrotechnical purpose filled with hydrolytic lignin
    SS Negmatov, YA Salimsakov, BB Sobirov, NS Kobilov, KS Negmatova, ...
    IV International Conference Times of Polymers (ToP) and Composites 1042, 238-239 , 2008
    2008
    Citations: 6