CONTENTS of journal "THNP" 3-4•2024
THE MAIN THEME: V.F. NOVOSELOV IS 95
УДК 622.692.4
https://doi.org/10.24412/0131-4270-2024-3-4-5-6
TALENTED SCIENTIST AND TEACHER (P. 5-6)
MASTOBAEV B.N., MUFTAKHOV E.M., FROLOV YU.A., NECHVAL A.M., MUFTAKHOVA V.N.
DESIGN, CONSTRUCTION AND OPERATION OF GAS AND OIL PIPELINES AND STORAGES
УДК 622.692.4.07:624.139
https://doi.org/10.24412/0131-4270-2024-3-4-7-12
APPROACH TO DETERMINING THE HEAT TRANSFER OF A PIPELINE INTO PERMAFROST (P. 7-12)
Garris Nina A., Nigmatullina Elvina A.
Ufa State Petroleum Technical University, 450064, Ufa, Russia
ORCID: https://orcid.org/0000-0001-7486-4491, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ORCID: https://orcid.org/0000-0003-1487-7295, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ABSTRACT
The interaction of the pipeline with permafrost is accompanied by thawing-freezing of the surrounding soil with the formation of a thawing halo, which significantly complicates not only the solution of heat transfer problems, but also makes the formulation of tasks problematic. There are two approaches to solving problems of thermal interaction of a pipeline with frozen soil: with the implementation of models of thermal conductivity and heat and mass transfer. Thermal conductivity models, in which the heat of phase transformations during melting-freezing of ground moisture is taken into account by effective thermophysical parameters in the thermally affected zone, are very complex. The problems of thermal interaction of a pipeline with permafrost and their solution using a heat and mass transfer model, the heat and mass transfer coefficients of which for real conditions are also uncertain, are even more complex and labor-intensive. For the case of a three-dimensional problem of heat and mass transfer of an underground pipeline in thawing-freezing soil, there is no solution. The work provides a solution taking into account the integral approach to calculating the heat transfer of a pipeline into permafrost. To determine the effective coefficient of thermal conductivity of soil, the Garris-Rusakov formula is proposed, which makes it possible to extremely simplify the thermal-hydraulic and technological calculations of an underground pipeline. It has been experimentally proven that with a change in the thermal conductivity coefficient of frozen soil λм over time, which occurs as a result of alternating processes of freezing-thawing of the soil around the pipeline, a hysteresis loop is built. Taking into account the significant (1.3 times) change in the thermal conductivity of the soil, when predicting the heat transfer of a pipeline in permafrost, it is proposed to take into account the phenomenon of hysteresis using the universal Garris-Rusakov formula.
KEYWORDS: permafrost soils, thawing halo, pipeline heat transfer, thermohydraulic calculation, average integral coefficient of soil thermal conductivity.
For citation: Garris N.A., Nigmatullina E.A. THE INTEGRAL APPROACH TO DETERMINING THE HEAT TRANSFER OF A PIPELINE INTO PERMAFROST. Transport and Storage of Oil Products and Hydrocarbons. 2024, no. 3-4, pp. 7–12.
УДК 622.692.4.053
https://doi.org/10.24412/0131-4270-2024-3-4-13-18
ANALYSIS OF MODELS FOR DETERMINING PRESSURE LOSS WHEN PUMPING OIL WITH NON-NEWTONIAN PROPERTIES (P. 13-18)
Barabanchshikova Tatyana A., Nurmukhamedov Chingiz I., Sokolova VictoriyaV., Tashbulatov Radmir R.
Ufa State Petroleum Technological University, 450064, Ufa, Russia
ORCID: https://orcid.org/0009-0003-4462-9986, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ORCID: https://orcid.org/0009-0005-1536-4127, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ORCID: https://orcid.org/0000-0002-6333-0897, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ORCID: https://orcid.org/0000-0001-5406-2352, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ABSTRACT
The article analyzes the dependences of pressure losses due to friction during turbulent flow of non-Newtonian fluid using the example of calculation for pipelines of different diameters. Heavy, highly solidifying Mangyshlak oil transported through the Uzen-Atyrau-Samara main oil pipeline was considered as the pumped liquid. The obtained results show that with an increase in the pipeline diameter, the calculation error for the analyzed dependencies increases, this is justified by the fact that these dependencies were obtained on the basis of experimental studies conducted on small-diameter pipelines.
KEYWORDS: hydraulic calculation of oil pipeline, pressure loss, non-Newtonian oil, Darcy-Weisbach formula, generalized Leibenzon formula, hydraulic gradient.
For citation: Barabanchshikova T.A., Nurmukhamedov C.I., Sokolova V.V., Tashbulatov R.R. ANALYSIS OF MODELS FOR DETERMINING PRESSURE LOSS WHEN PUMPING OIL WITH NON-NEWTONIAN PROPERTIES. Transport and storage of Oil Products and hydrocarbons. 2024, no. 3-4, pp. 13–18.
Acknowledges: The work was carried out within the framework of the research program of a fellow of the President of the Russian Federation with registration number SP-5254.2022.1.
УДК 622.692.2.07
https://doi.org/10.24412/0131-4270-2024-3-4-19-22
PERFORMANCE ANALISYS OF CONE-SHAPED PILES USING ANSYS SOFTWARE (P. 19-22)
Shvayko Yaroslav V., Abdullin Nail V.
Ufa State Petroleum Technological University, 450064, Ufa, Russia
ORCID: https://orcid.org/0009-0006-4843-0212, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ORCID: https://orcid.org/0000-0002-1721-3622, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ABSTRACT
The comparison of piles in the shape of a cone and a cylinder in the construction of a tank for storing liquefied natural gas in permafrost conditions is considered. It is hypothesized that the degree of impact of negative factors existing in the conditions of permafrost can be reduced by using cone-shaped piles. To verify the hypothesis put forward, two types of piles were modeled using the ANSYS software package and the results were compared.
KEYWORDS: cylindrical pile, cone-shaped pile, pile foundation, pile geometry, bearing capacity, pile field, computer-aided design system, ANSYS, permafrost, liquefied natural gas, finite element method.
For citation: Shvayko Y.V., Abdullin N.V. PERFORMANCE ANALISYS OF CONE-SHAPED PILES USING ANSYS SOFTWARE. Transport and Storage of Oil Products and Hydrocarbons. 2024, no. 3-4, pp. 19–22.
УДК 622.692.4.07
https://doi.org/10.24412/0131-4270-2024-3-4-23-31
EARLY ASSESSMENT OF DAMAGE TO POLYETHYLENE PIPELINES BASED ON LINEAR DIRECTIONAL WAVES (P. 23-31)
Palaev Alexander G., Tian Yifan, Wang Zehao, Huang Tianyang
Saint-Petersburg Mining University, 199106, Saint-Petersburg, Russia
ORCID: https://orcid.org/0000-0002-9960-8504, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ORCID: https://orcid.org/0000-0002-3507-2544, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ORCID: https://orcid.org/0009-0002-7359-3823, Email: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ORCID: https://orcid.org/0009-0000-4062-6495, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ABSTRACT
In the early assessment of polyethylene pipeline damage based on linear guided waves, precise detection and evaluation of damage within the pipeline system are crucial to ensure its operational integrity and safety. This paper utilizes the principle of acoustic guided waves, specifically linear guided waves, to identify potential issues such as leaks or cracks within the pipeline, aiming to mitigate risks before severe failures occur. Utilizing either co-located or oppositely located excitation methods, acoustic signals are introduced into the pipeline. Sensors are employed to collect acoustic signal data within the pipeline, which, after filtering, amplification, and time-domain analysis, yield valuable information about pipeline damage, thus identifying potential damage locations and characteristics. To enhance the accuracy and repeatability of the assessment, the optimization of damage factors, sensor placement, signal processing algorithms, and model parameters is undertaken to ensure optimal performance. The system is capable of precisely detecting water level reductions 5 seconds and 20 seconds after a leak occurs. The average damage localization is approximately ±0.46m, which contributes to reducing potential losses and maintenance costs, while simultaneously improving the reliability and safety of polyethylene pipeline systems.
KEYWORDS: linear guided waves, polyethylene pipelines, acoustic excitation, data acquisition, signal processing.
For citation: Palaev A.G., Tian Yifan, Wang Zehao, Huang Tianyang EARLY ASSESSMENT OF DAMAGE TO POLYETHYLENE PIPELINES BASED ON LINEAR DIRECTIONAL WAVES. Transport and Storage of Oil Products and Hydrocarbons. 2024, no. 3-4, pp. 23–31.
УДК 622.691.4.053
https://doi.org/10.24412/0131-4270-2024-3-4-32-36
APPLICATION OF LEAK DETECTION TECHNOLOGY USING NEGATIVE PRESSURE IN GAS PIPELINES (P. 32-36)
Palaev Alexander G., Chzhao Fumin, Tian Yifan
Saint-Petersburg Mining University, 199106, Saint-Petersburg, Russia
ORCID: https://orcid.org/0000-0002-9960-8504, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ORCID: https://orcid.org/0009-0005-5174-6341, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ORCID: https://orcid.org/0000-0002-3507-2544, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ABSTRACT
With the increase in long gas pipelines, the problem of leaks along pipelines is becoming more serious, which makes automatic leak monitoring and identification of leak sites in gas pipelines especially important. This article discusses the basic principles and methods of using negative pressure to monitor leaks in pipelines, discusses the optimization of the basic formula for determining location, and presents more accurate calculation formulas. It has been verified that the optimized calculation method has a higher localization accuracy, which is of some practical importance for creating a mathematical model for automatic leak monitoring in gas pipelines.
KEYWORDS: gas pipeline, leak detection, negative pressure localization.
For citation: Palaev A.G., Chzhao Fumin, Tian Yifan APPLICATION OF LEAK DETECTION TECHNOLOGY USING NEGATIVE PRESSURE IN GAS PIPELINES. Transport and Storage of Oil Products and Hydrocarbons. 2024, no. 3-4, pp. 32–36.
УДК 622.691.48
https://doi.org/10.24412/0131-4270-2024-3-4-37-41
MATHEMATICAL AMPLIFICATION OF FLOW WAVES WHEN DETECTING LEAKAGE IN AN OIL PIPELINES BY RTFS METHOD (P. 37-41)
Al’perovich Ilya V.
Wavecontrol LLC, 119454, Moscow, Russia
ORCID: https://orcid.org/0000-0002-6380-2727, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ABSTRACT
In oil pipelines leak detection systems nodes with pairs of closely spaced sensors can be used to distinguish between internal and external pressure drop waves. The pressure change at such node is a consequence of a change in the flow rate between the sensors. The pressure decreases or increases if the incoming flow is, respectively, less or more than the outgoing one. This flow trend is used to determine the direction of movement of the pressure wave in the Real Time Flow Speed (RTFS) method. In the proposed version the flow wave from leakage at nodes with close sensors is amplified by calculating by an implicit scheme with a shortened coordinate step and a relative shift of the pressure boundary conditions over time. The method is demonstrated on the real data.
KEYWORDS: Leak detection system in pipelines, RTFS method, enhanced RTFS method, mathematical model, implicit scheme, shifting boundary conditions.
For citation: Al’perovich I.V. MATHEMATICAL AMPLIFICATION OF FLOW WAVES WHEN DETECTING LEAKAGE IN AN OIL PIPELINES BY RTFS METHOD. Transport and Storage of Oil Products and Hydrocarbons. 2024, no. 3-4, pp. 37–41.
УДК 621.43.068
https://doi.org/10.24412/0131-4270-2024-3-4-42-49
AUTOMATIC SYSTEM FOR PREDICTING EMISSIONS OF CARBON MONOXIDE AND NITROGENOUS COMPOUNDS OF THE GAS COMPRESSOR UNIT (P. 42-49)
Glushkov Semyon V., Valeev Anvar R.
Ufa State Petroleum Technological University, 450064, Ufa, Russia
ORCID: https://orcid.org/0009-0007-7572-730X, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ORCID: https://orcid.org/0000-0001-7197-605X, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ABSTRACT
This article analyses the use of emissions accounting systems produced by the GCU during operation. The analysis was carried out in three large groups: control systems based on periodic measurements; continuous monitoring systems (CEMS) and predictive monitoring systems (PEMS). At the moment, PEMS systems are becoming the most promising, since they are automated, unlike periodic measurements; versatile and flexible, can be easily scaled and do not require as many resources as CEMS. In the course of the work, the dependence of the GCU performance indicators, both external and internal in relation to the target variables CO and NOx, was analysed, it was found out which parameters make the greatest contribution to the prediction of target variables. The prediction of pollutant emissions, calculation of the coefficient of determination and calculation of the accuracy of the most commonly used machine learning models, such as linear regression, random forest, decision trees, Cat Boost, Gradient Boost, Neural Network, were implemented, and an ensemble of models was tested. The results obtained indicate the possibility of using PEMS systems to account for pollutants.
KEYWORDS: exhaust gases, monitoring systems, forecasting systems, pollutants, carbon monoxide, nitrogenous compounds.
For citation: Glushkov S.V., Valeev A.R. AUTOMATIC SYSTEM FOR PREDICTING EMISSIONS OF CARBON MONOXIDE AND NITROGENOUS COMPOUNDS OF THE GAS COMPRESSOR UNIT. Transport and Storage of Oil Products and Hydrocarbons. 2024, no. 3-4, pp. 42–49.
УДК 622.691.4
https://doi.org/10.24412/0131-4270-2024-3-4-50-55
CALCULATION OF GAS FLOW THROUGH HOLES IN THE SURFACE OF HIGH-PRESSURE VESSELS (P. 50-55)
Lurye Mikhail V.
Gubkin Russian State University of Oil and Gas (National Research University), 119991, Moscow, Russia
E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ABSTRACT
This article considers the theory and methods of calculating the mass of gas flowing out through a through hole in the surface of a gas pipeline or any other high-pressure vessel. This problem is encountered in many technological processes of gas transportation, distribution and storage, not to mention accidental leaks into the atmosphere and subsequent determination of material and environmental dam-age. And almost always questions arise about quantitative methods for calculating the mass of gas leaked from a vessel or gas pipeline. If for the so-called perfect (ideal) gas this problem is solved to one degree or another, then for a real gas (and at a pressure in a vessel above 1.0 MPa no gas can be considered perfect) there is no clarity at all in the issue of calculating the mass of the leaked gas. This article pre-sents in detail and consistently a method for calculating the gas flow through through holes in the walls of high-pressure vessels (including gas pipelines) for both perfect and real gas. The style of the presentation is deliberately chosen so that an interested worker in the gas industry could follow all the details of the theory and the calculation method.
KEYWORDS: through hole, gas outflow, flow rate, speed of sound, jet, compressed section, adiabatic process, Bernoulli equation.
For citation: Lurye M.V. CALCULATION OF GAS FLOW THROUGH HOLES IN THE SURFACE OF HIGH-PRESSURE VESSELS. Transport and Storage of Oil Products and Hydrocarbons. 2024, no. 3-4, pp. 50–55.
CONSTRUCTION AND REPAIR OF GAS AND OIL PIPELINES AND GAS AND OIL STORAGE FACILITIES
УДК 622.692
https://doi.org/10.24412/0131-4270-2024-3-4-56-60
MONOLITHIC SEGMENTED SPHERICAL FOUNDATION FOR LARGE TANKS, EQUIPPED WITH A SYSTEM FOR DETECTING AND PREVENTING SUBSIDENCE OF SOIL (P. 56-60)
Sorokina Mariya N.1, Zemlerub Leonid E.2, Teregulov M.R.2
1LLC SamaraNIPIneft, 443010, Samara, Russia
ORCID: https://orcid.org/0000-0002-1151-7385, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
2Samara State Technical University, 443100, Samara, Russia
ORCID: https://orcid.org/0000-0001-9601-4965, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ORCID: https://orcid.org/0000-0002-2790-9244, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ABSTRACT
Certain types of foundations for various reservoirs are considered. It is proposed to supplement a number of foundations used in tank construction with an unparalleled design of a monolithic segmented spherical foundation with a system for controlling the volume of the segment cavity formed during subsidence and a system for eliminating this subsidence. The use of such a foundation eliminates that part of accidents in tank farms that occur as a result of uneven subsidence of the soil and subsequent sedimentation of foundations.
KEYWORDS: vertical cylindrical steel tank, segmented spherical foundation, uneven settlements, volume of the subsidence cavity, monitoring and control system.
For citation: Sorokina M.N., Zemlerub L.E, Teregulov M.R. MONOLITHIC SEGMENTED SPHERICAL FOUNDATION FOR LARGE TANKS, EQUIPPED WITH A SYSTEM FOR DETECTING AND PREVENTING SUBSIDENCE OF SOIL. Transport and Storage of Oil Products and Hydrocarbons. 2024, no. 3-4, pp. 56–60.
УДК 62-112.4; 69.003
https://doi.org/10.24412/0131-4270-2024-3-4-61-65
THE EFFECT OF CORROSION ON THE STRENGTH OF THE OBTURATOR UNDER THE ACTION OF TEST PRESSURE (P. 61-65)
Sekachev Andrey F.1, Lanbina Anastasiya S.1, Nurmukhamedov Chingiz I.2
1Omsk State Technological University, 644050, Omsk, Russia
2Ufa State Petroleum Technological University, 450064, Ufa, Russia
ORCID: https://orcid.org/0000-0001-5663-0114, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ORCID: https://orcid.org/0009-0004-1550-943Х, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ORCID: https://orcid.org/0009-0005-1536-4127, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ABSTRACT
The paper considers the stress-strain state of an isotropic round plate of variable thickness (rotary plug) under the action of test pressure. A feature of the formulation of this task is to take into account the corrosive aggressiveness of the medium. The factors determining the calculated cases of the stress-strain state of the plug are investigated. It has been established by numerical simulation that the influence of a stress concentrator at an angle of 45° at the point of attachment to the flange connections affects the movements in the central part. The discrepancy between the values for plates of constant thickness and theoretical calculations has been revealed.
KEYWORDS: obturator, corrosion additive, round plate, stress-strain state, variable thickness, chamfer, stress concentrators.
For citation: Sekachev A.F., Lanbina A.S., Nurmukhamedov Ch.I. THE EFFECT OF CORROSION ON THE STRENGTH OF THE OBTURATOR UNDER THE ACTION OF TEST PRESSURE. Transport and Storage of Oil Products and Hydrocarbons. 2024, no. 3-4, pp. 61–65.
УДК 622.691.4.053
https://doi.org/10.24412/0131-4270-2024-3-4-66-73
ELIMINATION OF DEAD-END VIBRATION OF THE PROCESS PIPING OF THE GAS PUMPING UNIT OF THE COMPRESSOR STATION (P. 66-73)
Bilkov Aleksandr V., Godovskiy Dmitriy A., Tokarev Artem P.
Ufa State Petroleum Technical University, 450064, Ufa, Russia
ORCID: https://orcid.org/0009-0001-7781-2862, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ORCID: https://orcid.org/0000-0003-2554-5069, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ORCID: https://orcid.org/0000-0001-8684-2011, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ABSTRACT
Increased vibration of the pipeline system of compressor shops is one of the important problems affecting the reliability and efficiency of gas transportation. The article is devoted to the assessment of the vibration state and determination of the causes of increased vibration of the bypass line of the process piping of a partial-pressure gas pumping unit of the compressor station, located on the jumper of the inlet and outlet nozzles of the centrifugal compressor. The article also considers the issues of predicting the operation of the process piping with an acceptable vibration level based on the obtained static data. A promising solution for reducing vibration of the process piping of centrifugal compressor of compressor stations was chosen to be the method of changing the ratio of the lengths (shoulders) of the dead-end sections of the process piping (crane transfer), since this method allows ensuring vibration resistance of pipelines in the entire range of operating modes of gas pumping units and the compressor station. Using probabilistic-statistical methods of decision making, operating modes of the compressor shop were determined, in which the vibration level of the bypass line under consideration is within acceptable values.
KEYWORDS: process piping, low-frequency vibration, dead-end gas oscillations, probabilistic-statistical analysis, stress-strain state, finite element calculation.
For citation: Bilkov A.V., Godovskiy D.A., Tokarev A.P. ELIMINATION OF DEAD-END VIBRATION OF THE PROCESS PIPING OF THE GAS PUMPING UNIT OF THE COMPRESSOR STATION. Transport and Storage of Oil Products and Hydrocarbons. 2024, no. 3-4, pp. 66–73.
УДК622.692.4.07:624.139
https://doi.org/10.24412/0131-4270-2024-3-4-74-77
THERMOHYDRAULIC STABILITY OF MAIN OIL PIPELINE IN PERMAFROST (P. 74-77)
Glukhova Zemfira R., Garris Nina A.
Ufa State Petroleum Technical University, 450064, Ufa, Russia
ORCID: https://orcid.org/0009-0009-3341-3681, Email: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ORCID: https://orcid.org/0000-0001-7486-4491, E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ABSTRACT
Active thermal interaction of main oil pipelines with frozen soil, which is inevitable during non-isothermal pumping, leads to progressive thawing of permafrost, which increases the risk of emergency situations. Soil thawing can be limited by organizing a balanced heat exchange between the pipeline and the environment through isothermal pumping. The purpose of the study is to prove the possibility of maintaining a stationary isothermal pumping mode with small temperature disturbances of the environment. The article proves that a stable thermal-hydraulic mode of an above-ground pipeline in an embankment on the MMG is achieved with isothermal pumping with a balance oil temperature exceeding the temperature of the frozen soil by several degrees. It is also recommended to use the thermal stability criterion proposed by E. F. Adiutori to assess the thermal-hydraulic stability of the “pipeline – frozen soil” system and ensure the operability of objects in such cases as determining the time of safe shutdown of a pipeline with a guaranteed return to the original operating mode, when calculating the start-up mode of a pipeline, when changing its operating mode.
KEYWORDS: thermal stability, above-ground oil pipeline in embankment, controlled heat exchange, self-immersion laying on permafrost, permafrost soils.
For citation: Glukhova Z.R., Garris N.A. THERMOHYDRAULIC STABILITY OF MAIN OIL PIPELINE IN PERMAFROST. Transport and Storage of Oil Products and Hydrocarbons. 2024, no. 3-4, pp. 74–77.
