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| Transportation, storage, pipelines |
11.12.11
R.A. Kharisov, I.F. Kantemirov, Sh.Z. Isaev, R.S. Zainullin. Evaluation of resistance failure of pipes with changes of net sections. Electronic scientific journal "Oil and Gas Business", 2011, Issue 5, pp. 96-104. http://www.ogbus.ru/authors/Kharisov/Kharisov_5.pdf ![]()
This work is devoted to research and development of methods of estimation of resistance to brittle and ductile fracture of pipes with localized changes in the net sections.
Proposed and justified method of calculation determining the coefficient of resistance of pipes with a multiparameter crack-damage formed during their interaction with the rocky soil. The results obtained are the starting point for calculations predicted and residual life of pipelines and their basic elements.
Keywords: damage, corrosion-mechanical effect, temper, mode of deformation, crack-damage, stress concentration, fracture strength, plastic deformation
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05.12.11
R.A. Kharisov, I.F. Kantemirov, I.A. Daminov, A.V. Gerasimov. Performance evaluation of the oil pipeline repair by diagnostic data. Electronic scientific journal "Oil and Gas Business", 2011, Issue 5, pp. 105-111. http://www.ogbus.ru/authors/Kharisov/Kharisov_6.pdf ![]()
The Russian Federation has been in operation considerable number of pipeline transportation. At present, the level of reliability adversely affects a number of factors: the difficult economic conditions, lack of adequate investment, and a steady increase in the proportion of objects, exhausted regulatory period, as well as more stringent operating conditions. Under these conditions, accident prevention and environmental protection are possible only with timely conduct of technical diagnostics. This determines the relevance of the newest methods of nondestructive testing, providing faster diagnosis, to obtain reliable estimates of technical condition and residual life prediction informed of safe operation. It is based on the results of diagnostic monitoring set amount of capital or selective repairs.
Keywords: selective repair, planning, evaluation, performance, diagnostics, oil pipeline efficiency
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03.12.11
A.S. Tyusenkov, D.V. Kononov, D.E. Bugay, A.B. Laptev. Change of corrosive properties of water at joint transport of water-oil mixture on the steel-lined pipeline. Electronic scientific journal "Oil and Gas Business", 2011, Issue 5, pp. 89-95. http://www.ogbus.ru/authors/Tyusenkov/Tyusenkov_1.pdf ![]()
When transporting petroleum products through oil gathering pipelines lined leads to the generation of static electricity charges. These charges are collected in a volume of water present, changing its pH and oxidation reduction potential (Eh). The shift of pH and Eh of water can lead to a significant increase in the rate of corrosion of metal parts oil gathering lined pipes, which substantially reduce the safety of their operation. The main purpose of research: to establish the influence of a charged (activated) of water having different pH and Eh, the rate of corrosion of pipe steel.
Keywords: water-oil emulsion, static charge, oxidation reduction potential, redistribution of charges, speed of corrosion
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03.12.11
A.A. Aleksandrov, V.A. Kotlyarevskiy, V.I. Larionov, Yu.V. Lisin. The model of dynamic analysis of seismic effects strength of main pipelines. Electronic scientific journal "Oil and Gas Business", 2011, Issue 5, pp. 66-88. http://www.ogbus.ru/authors/Aleksandrov/Aleksandrov_1.pdf ![]()
The model which is the method of dynamic analysis of stressed-deformed state (SDS) and parameters of the dynamics of the linear part of the main pipeline buried into the soil on seismic loads with optional orientation of the pipeline line towards wave vector was studied. Models of materials and soil are offered. The algorithm of the decision of a problem is developed. The stress on the pipeline by the seismic waves is considered on three components in rectangular system of coordinates.
Keywords: main oil pipeline, soil, load, internal forces, temperature drop, accelerogram, Fourier transform
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03.12.11
I.O. Zolotov, A.S. Losenkov, S.A. Strelnikova. Some features of the hydraulic mathematical model development for pipeline with variable wall thickness. Electronic scientific journal "Oil and Gas Business", 2011, Issue 5, pp. 54-65. http://www.ogbus.ru/authors/Zolotov/Zolotov_1.pdf ![]()
In this paper authors consider a question of the initial data at the stage of the construction of hydraulic model. Some features of the hydraulic mathematical model development for pipeline with variable wall thickness are discussed. Here are presented quantitative assessments of a calculation error of hydraulic models related to different methods of using initial data about the thickness of the pipeline wall. Some experimental results about the effect of non-uniform wall thickness on the hydraulic processes in the pipeline are considered. The method of equivalent diameter identification that takes into account the non-uniform wall thickness distribution is proposed.
Keywords: mathematical modeling, hydraulic models, variable wall thickness, inner diameter, sound speed in the pipeline
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09.09.11
R.R. Khasanov, I.R. Yarullin, S.M. Sultanmagomedov, R.A. Kharisov. Embedded controlling and measuring apparatus for monitoring of underground T-joints. Electronic scientific journal "Oil and Gas Business", 2011, Issue 4, pp. 42-49. http://www.ogbus.ru/authors/KhasanovR/KhasanovR_2.pdf ![]()
In article natural methods of measurement of the intense-deformed condition of underground pipelines are given. The main merits and demerits of contact and non-contact measuring methods are presented in detail. Examples of using embedded controlling and measuring apparatus on the basis of contact methods of measurements on engineering constructions of industrial and civil objects, underground pipelines in particular are investigated. For monitoring of tension of underground pipelines are widely implemented “intelligent” insert equipped with strain gauges. Similar monitoring system for underground T-joints is proposed to be worked out.
Keywords: experimental method, stressed-deformed state , T-joint, embedded controlling and measuring apparatus
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04.07.11
I.N. Egorov, D.A. Kadhim.Applications mobile robots for diagnostic inside pipelines by applied variable cross-section. Electronic scientific journal "Oil and Gas Business", 2011, Issue 3, pp. 73-83. http://www.ogbus.ru/authors/EgorovIN/EgorovIN_1.pdf ![]()
The ways of moving of the mobile robots in the pipelines are considered and the technological difficulties inside pipe of diagnostics of distributive gas pipelines and the gas pipelines - branch's with variable cross section are marked. The possibility of diagnostics of such as gas pipelines self-moving by adaptive wheel mobile robots is shown. The mechanisms of adaptation pressing of wheel modules to an internal surface of the pipeline are described. The basic computational relations, algorithms of computation and function scheme of the system position-force control of the mechanism pressing of wheel modules are given.
Keywords: pipeline, mobile robot, adaptation, mechanism of adaptation, defects, cross section, wheel modules, control
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04.07.11
I.E. Ishemguzhin, T.I. Gabbasov, I.A. Shammazov, M.R. Sitdikov, M.A. Kochekov. Damping parametrical vibrations of the pipeline. Electronic scientific journal "Oil and Gas Business", 2011, Issue 3, pp. 84-93. http://www.ogbus.ru/authors/IshemguzhinIE/IshemguzhinIE_2.pdf ![]()
Parametrical vibrations of the pipeline are considered. Influence of operational conditions on their occurrence is shown. By means of the stability diagram areas of a parametrical resonance are defined. Recommendations about elimination of parametrical vibrations of the pipeline are made.
Keywords: pipeline, operating conditions, parametric vibrations, dynamic stability, shock-absorber of vibrations
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24.06.11
L.F. Shiriazdanova, O.A. Makarenko, B.A. Kozachuk, N.T. Gabdrahmanova, S.M. Halabi. The basic aspects of neural network forecasting model of the electric power consumption for developing oil pipelines. Electronic scientific journal "Oil and Gas Business", 2011, Issue 3, pp. 94-102. http://www.ogbus.ru/authors/Shiriazdanova/Shiriazdanova_1.pdf ![]()
The work is devoted to forecasting of electricity consumption in the planning period of operation of main oil pipelines. The algorithm of construction of mathematical model is developed for developing oil pipelines on the basis of the real data of operation of several main oil pipelines.
Keywords: oil pipeline, pumping, forecast, power consumption, neural networks, developing oil pipelines
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25.04.11
I.Ŕ. Sagitov, Ŕ.G. Gumerov, Kh.Ŕ. Azmetov. Selection of technical and technological parameters of pumpdown product from the cavity plot of oil pipeline . Electronic scientific journal "Oil and Gas Business", 2011, Issue 2, pp. 78-81. URL: http://www.ogbus.ru/authors/eng/authors/Sagitov/Sagitov_1e.pdf ![]()
http://www.ogbus.ru/authors/Sagitov/Sagitov_1.pdf ![]()
The calculation formulas for determination of operating efficiency of product removal from pipe-line cavity by pump exhausting depending on section area and pressure head of a relieved pipe line so as to provide maximum possible operating efficiency of product removal from the pipe line. The obtained results can be used for breakdown maintenance of oil-trunk pipelines and overhaul of oil-products pipelines.
Keywords: oil-trunk pipeline, operating efficiency of product removal from pipe line cavity, emergency blowout, gravity-flowing discharge
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26.11.10, A.M. Shammazov, B.A. Kozachuk, N.T. Gabdrahmanova, L.F. Shiriazdanova
ALGORITHM OF THE DECISION OF THE PROBLEM OF FORECASTING POWER CONSUMPTION IN PIPELINE TRANSPORT OF OIL WITH USE OF NEURAL NETWORKS
http://www.ogbus.ru/authors/Shammazov/Shammazov_2.pdf (in Russian)
Work is devoted forecasting of the expense of the electric power in planning of operating modes of the main oil pipelines. Approaches and algorithm of construction of mathematical model on the basis of the real data of operation of the main oil pipeline are developed.
Keywords: oil pipeline, pumping, forecast, power consumption, neural networks
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26.10.10, B.N. Epifantsev
DETECTION OF LOCAL CHANGES ON TRUNK PRODUCTS PIPELINES ROUTES BY MEANS OF THERMAL IMAGING: INTRODUCTION
http://www.ogbus.ru/authors/Epifantsev/Epifantsev_1.pdf (in Russian)
http://www.ogbus.ru/eng/authors/Epifantsev/Epifantsev_1e.pdf (in English)
In this article the problem of detection of local changes on trunk products pipeline routes by means of thermal imaging has been formulated, and ways of its decision have been proved.
Keywords: trunk pipeline, unauthorized cut-in, thermal reconnaissance, detection parameters
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31.08.10, E.A. Lyubin, A.A. Korshak
CRITERIA EQUTIONS OF MASS EVAPORATION AT OPERATIONS WITH OILS IN VERTICAL CILINDRICAL TANKS
http://www.ogbus.ru/authors/Lyubin/Lyubin_1.pdf (in Russian)
New criteria equations of mass evaporation at the various operations with oil (standing, emptying, filling of tank) are derived. The given equations are necessary for calculation of oil losses from evaporation. The new criteria equations have been compared with earlier existing criteria equations, which disadvantages have been eliminated during reception of new dependences. Possible errors rate of the received formulas is calculated.
Keywords: oil losses, oil evaporation, criteria equations, a steam-air mix, mass evaporation, standing, emptying, filling of tank, design procedure of oil losses, steam concentration, dynamics of oil evaporation, Kt-criteria
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25.05.10, N.A. Garris, I.G. Ismagilov, A.N. Bachtegareeva
CHANGING HEATPHYSICAL CHARACTERISTICS OF GROUND AROUND GAS-MAIN HIGHT DIAMETR PIPELINE CAUSE ACTIVATE CORROSION PROCESSES
http://www.ogbus.ru/authors/Garris/Garris_6.pdf (in Russian)
Experimental data was derived from measuring point is indicate that unstable of heat exchange cause alternating moving of liquid in corrosive active ground layer. Investigating of changing ground moisture which is lead to heat and electric conductivity changing we might predict corrosion processes rate.
Keywords: heat exchange, corrosive processes, gas-main pipeline, heat conductivity coefficient, soil moisture, temperature action, heat flow
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12.05.10, N.M. Cherkasov, I.F. Gladkykh, V.Ŕ. Filimonov, V.I. Sergeyev
THE EXPERIENCE OF ASMOL INSULATING COVERINGS FOR MAIN PIPELINE REPAIRING
http://www.ogbus.ru/eng/authors/Cherkasov/Cherkasov_1e.pdf
http://www.ogbus.ru/authors/Cherkasov/Cherkasov_1.pdf (in Russian)
In the article authors raised the problem of insulation coating for pipeline repair. The shortcomings of bitumen-polymer coatings are considered.
The new coating on the basis of new reactive matter Asmol is proposed. The research results were presented with metal Asmol interaction. Shows that protective action of Asmol caused by not only creating a barrier against diffusion corrosion-active environment to metal pipes, but change the
thin structure of metal in the surface layers.
Keywords: main pipeline, corrosion, insulating coating, Asmol, chemical interaction, adhesive bond
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18.03.10, R.A. Kharisov, I.F. Kantemirov
EXPERT APPRAISAL FOR PROTECTIVE COATINGS OF PIPELINES
http://www.ogbus.ru/authors/Harisov/Harisov_4.pdf (in Russian)
In this article new technique of expert appraisal for determination of optimal isolation weight is designed, basic parameters, that influence on endurance and cost of insulating coating are revealed, questionnaire for experts is composed. It was formed the group of experts, who are one of the best specialists of pipeline corrosion protection in our country. Experts were polled. Statement of amount of grouped expert appraisal was carried out.
The analysis of grouped expert appraisal has revealed two most likely types of protective coatings for pipelines - polyurethane and polyethylene tapes with double-sided adhesive layer for route conditions application and polypropylene and č polyethylene-extruded for manufactory conditions application.
Keywords: isolation, index, protective coating, expert appraisal, factor, property, judgment, clan, algorithm/ technique, rank, matrix, competence
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24.02.10, A.A. Bekbaulieva, A.R. Epshtein, A.I. Podjapolsky, A.A. Mugatabarova
PROTECTION IMPROVEMENT OF THE PIPELINES INTERNAL SURFACE FROM CORROSION
http://www.ogbus.ru/authors/Bekbaulieva/Bekbaulieva_1.pdf (in Russian)
Electrochemical impact (effect) methods for the internal corrosion reduction as a type of sacrificial protection with the ionic bond between electrodes usage allows forming the protective passivating film that blocks the electrolyte to the pipeline surface access.
Keywords: pipeline systems corrosion, corrosion protection methods, cathodic protection
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18.02.10, A.R. Valeev, A.N. Zotov
NEW CONSTRUCTION METHODS OF INCREASING PIPELINE SEISMIC RESISTANCE
http://www.ogbus.ru/authors/Valeev/Valeev_2.pdf (in Russian)
Influence of different types of seismic waves on construction is discussed. Modern construction methods of pipeline protection in seismic active regions are analyzed. Fundamentally new type of pipeline support is shown and estimated, that provides protection of object of the vertical component of waves. The way of its realization is schematically shown.
Keywords: seismic stability, seismic waves, sound-insulating material, pipe line reliability, quasi-zero-stiffness
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03.12.09, R.A. Harisov
CONSTRUCTION DESIGN OF ISOLATION TAPE WITH DOUBLE-SIDED ADHESIVE LAYER
http://www.ogbus.ru/authors/Harisov/Harisov_3.pdf (in Russian)
Current construction of polymeric tapes and covers was analized in this article, new construction of polymeric belt covering with double-sided adhesive layer with separable antiadhesive tape was invented, that gives permission to improve reliability of isolating coating, to reduce pipeline's metal corrosion at the expense of adhesion increase and decrease of water permeability between loops of insulation tapes and covers.
Analysis of current construction of tapes with double-sided adhesive layer, which are used in pipeline isolation, has revealed that newly designed construction due to modernization and reworking of disadvantages of previous tapes and covers with internal and external adhesive layer is very applicable nowadays.
Keywords: insulation tape, construction, winding, protective coating, reliability, property, evaluation, review, invention, antiadhesional tape, double-sided adhesive layer, adjacent laps
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03.11.09, A.R. Valeev
THERMAL REGIME OF PIPELINES. THE QUESTION OF ACCOUNT OF OIL AND GAS HEATING IN PIPELINES
http://www.ogbus.ru/authors/Valeev/Valeev_1.pdf (in Russian)
The problem of friction heat of oil and gas in pipeline is raised. The inaccuracy of calculation and it's influence on oil pipelines are discussed. Fundamentally new model of heat distribution on pipeline section is offered. The model is analyzed against other experiments. An improved heat calculation is offered.
Keywords: friction heat, thermal conditions, thermal design, heat exchange, friction heat coefficient
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26.10.09, T.A. Huseinov
INEQUAL CONSUMPTION OF NATURAL GAS IN GAS TRANSPORTATION SYSTEMS AND ITS INFLUENCE TO TECHNOLOGICAL PROCESSES
http://www.ogbus.ru/eng/authors/Huseinov/Huseinov_1.pdf
Have been conducted the investigations according to natural gas usage in different technological processes and have been achieved below results:
1. In different industrial areas the natural gas consumption is formed by influence of different factors. These factors are formed according to the character of process, energy efficiency of used technology, capacity of using different type of energy courses, environmental influence, sequence of production process and etc. In the result, enterprises create daily and monthly season inequality in natural gas consumption.
2. The objects utilizing big volumes of natural gas are used as buffer regulators and the main factor which stays on base of this condition is the region factor. Any of big volume consumers could play a role of buffer regulator according to the demand of natural-geographic region which it is placed.
Keywords: gas, underground storage of gas, pipeline transport of gas, gas consumption , regulation of inequality, volume of gas consumption, "Mine-pipeline transportation- natural gas distribution" system, distribute function, season inequality
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15.09.09, R.Sh. Katanov
APPLICATION OF ADAPTIVE MODELS IN TECHNOLOGICAL MONITORING THE PIPELINES.
http://www.ogbus.ru/authors/Katanov/Katanov_1.pdf (in Russian)
For operative management of the pipeline adaptive model application which using actual information from system SCADA is considered.
Keywords: pipelines, adaptive model, time series, SCADA
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24.04.09, T.V. Jafarov
ABOUT INCREASE OF EFFICIENCY OF FUNCTIONING OF GAS PIPELINES ON THE BASIS OF DIAGNOSTICS OF THE CONDITION OF THEIR INTERNAL SURFACE AT THE STATIONARY MODĹ
http://www.ogbus.ru/authors/Jafarov/Jafarov_2.pdf (in Russian)
The problem of maintenance of high level of reliability and efficiency of functioning of gas pipelines is a complex problem. One of principal causes of deterioration of working capacity of a gas pipeline is its corking (partial or full). For working out of operative methods of detection of corking and acceptance of timely engineering decisions providing a normal mode of functioning of a gas pipeline, is represented the question of diagnostics of an internal surface of a gas pipeline actual.
For research of influence of a zone of corking on the stationary characteristic of a gas stream has been collected experimental installation. Have been considered various volumes of corking of a gas pipeline. On the basis of researches for practical calculations is offered the technique of definition of a place of corking of a gas pipeline.
Keywords: gas supplying system, the rising of reliability, analyses the condition, zones formation of hydrate accumulation
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26.02.09, E.V. Danzanova
QUESTIONS OF THE CONTROL OF QUALITY WELDED JOINING THE POLYETHYLENE PIPES FOR GAS MAIN
http://www.ogbus.ru/authors/Danzanova/Danzanova_1.pdf (in Russian)
At the temperature surrounding air below normative welding polyethylene pipes for gas main is made on proposed in IPNG SB RAS technological mode. The Efficiency of the technological mode was researched by methods of the checking quality welded join recommended by normative document. It is installed that recommended methods do not allow realistically to reveal the breaches of the technological mode.
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20.02.09, N.B. Agayev, T.A. Huseinov
INFORMATION-TECHNOLOGICAL MODELS OF REGULATION OF INEQUALITY IN SYSTEM "PRODUCTION - PIPELINE TRANSPORT - DISTRIBUTION OF NATURAL GAS"
http://www.ogbus.ru/authors/Agayev/Agayev_2.pdf (in Russian)
The mathematical model of optimum regulation of inequality in system "production - pipeline transport - distribution of natural gas" has been developed. The model takes into account the basic technology factors of determining normal functioning of the given system. On the basis of the actual data base is shown the working capacity of offered (suggested) model. There have been determined the prognosis values of the beginning of the gas collection from Underground Storage of Gas (USG) and piping into (USG) which's knowledge allows to adjust in the best way the technological processes of work of all system "production-pipeline transport-distribution of natural gas"
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12.01.09, R.G. Kasatkin
ORGANIZATION OF OIL AND NATURAL GAS TRANSPORTATION FROM ARCTIC OFF-SHORE FIELDS: INTERNATIONAL EXPERIENCE
http://www.ogbus.ru/authors/KasatkinRG/KasatkinRG_1.pdf (in Russian)
In this article author analyses international experience of Organization of oil and natural gas transportation from Arctic off-shore fields, especially the experience of Norway and United States oil and gas companies. On the basis of the research the author critically evaluates the activity of Russian companies and make some practical recommendation for further development in this area.
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11.01.09, T.V. Jafarov
ABOUT THE RISING OF RELIABILITY OF GAS SUPPLYING
http://www.ogbus.ru/authors/Jafarov/Jafarov_1.pdf (in Russian)
In the process of exploitation of gas transport system, come across with the fact when user does not get natural gas in necessary quantity. Frequently the reason of it is linking to gas transportation of net works, not foreseen by project. In consequence of it, the total needs in natural gas increase capacity of the system.
On the base of dispatchers and statistical information, it was investigated the most dense far- flung gas transportation net in Azerbaijan-Apsheron gas distributive system. It was exposed that disparity of carrying capacity of gas transportation net in the whole or its separate districts brought to breach of normal gas supplying to users. For removing of that fact it necessary the reconstruction of the system. First of all it is necessary to analyses the condition of the system in order to determine the users who owing to overwork of the system in the whole normally not supplying by gas. There exist different methods of mentioned analysis. In this article offered simplified method for practical calculation providing enough reliable results.
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14.06.08, D.V. Dolgov
WATER-GAS MIXTURE STABILITY FACTOR FOR PIPELINES
http://www.ogbus.ru/authors/Dolgov/Dolgov_3.pdf (in Russian)
The expression of the gas-liquid mixture stability factor for horizontal pipelines is defined. It allows calculating the maximum diameter of gas bubbles at which they are held up in the turbulent flow.
The empirical value for a coefficient of proportionality used in the expression of the dependence of bubbles maximum diameter on the stability factor is found. The stability factor amounts 0.64.
To calculate the length of a pipeline where breaking of the water-gas mixture at given bubbles diameter, pipe diameter, flow rate, viscosity and density occurs a corresponding dependence is found.
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17.05.08, Yu.Yu. Fyodorov, A.V. Savvina
STRESS-STRAIN PROPERTIES OF UNDERGRAUND GAS PIPELINES UNDER THE CONDITIONS OF THE PERMAFROST
http://www.ogbus.ru/authors/Fyodorov/Fyodorov_1.pdf (in Russian)
Forecasting of stress-strain state of underground polyethylene gas pipeline under the conditions of the permafrost is carried out. The results of the analysis of the pipe bending stresses caused by ununiforn swelling of grounds. Account for existence of satisfactory strength of the material. It was shown that long-term influence of bending stress together with viscoelastic properties of the material at real operation temperature in the course of time decreases stresses occurring in it.
The investigation is supports by RFBR, project ą03-01-96018.
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28.12.07, Kh.M. Hamzayev
SOME PROBLEMS OF PIPELINE TRANSPORT OIL AND OIL PRODUCTS
http://www.ogbus.ru/authors/Hamzayev/Hamzayev_1.pdf (in Russian)
Work is devoted to research of some questions of pipeline transport of oil and oil products. In the first part of work the problem of a choice of an operating mode of the pump station located on the set site of the pipeline is considered, and in the second part the problem of detection of outflow of oil and oil products in pipelines is investigated.
For the mathematical description of problems the one-dimensional mathematical model of stationary movement of a viscous liquid on the pipeline is used. Thus pressure and the mass charge of a liquid in initial and final sections of the pipeline are considered set. The analytical method of the decision of tasks in view is offered and obvious formulas for definition of an operating mode of pump station, the mass charge on outflow and places of outflow in the pipeline are received.
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20.11.07, N.P. Starostin, A.I. Gerasimov, N.A. Belchusova, O.A. Ammosova
THE INFLUENCE OF LOW AIR TEMPERATURES ON THE CRYSTALLINITY OF THE WELDED JOINT MATERIAL OF THE PIPELINE FROM POLYETHYLENE PIPES
http://www.ogbus.ru/authors/Starostin/Starostin_1.pdf (in Russian)
The method of calculating the time of the action of the heating instrument at welding the gas pipeline from the polyethylene pipes at air temperatures being lower than the regulated ones is suggested on the basis of mathematical simulation of the heat process. The degree of the crystallinity of the welded joint materials obtained during cooling in the natural conditions of low temperatures is investigated.
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10.10.07, D.A. Babichev, M.Y. Zemenkova
INCREASING OF EFFICIENCY AND SAFENESS OF HYDROCARBON FLUIDS TANK STORAGE BY MEANS OF FLEXIBLE CIRCULAR SHELLS
http://www.ogbus.ru/authors/Babichev/Babichev_1.pdf (in Russian)
The current article deals with research of capability of crude oil storing in flexible shell tanks of great volume. Fundamental construction of variable volume tank with soft polymer shell was brought forward. Finite-element mathematical and computational models of flexible circular shell, permitting to define its shape and tension were developed.
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12.09.07, S.M. Dudin, Yu.D. Zemenkov
MATHEMATICAL AND THE SUPPLY WITH INFORMATION OF MONITORING OF HYDRODYNAMICAL CHARACTERISTICS OF HYDROCARBONIC ENVIRONMENTS IN PIPELINES
http://www.ogbus.ru/authors/Dudin/Dudin_1.pdf (in Russian)
In work problems of pipeline transport of multiphase environments are considered, prominent features of hydrodynamical processes are described, the general preconditions for modelling movement of multiphase systems in pipes are resulted, the model of current of multiphase environments in pipelines is considered generalized physical and mathematical, the method of gathering and processing of the information on a condition of process of swapping is described, etc.
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11.09.07, Astvatsatur'yan R.E., Kocharyan E.V.
MODELLING OF MOVEMENT OF GAS IN GAS MAINS IN VIEW OF FORCES OF INERTIA OF A STREAM
http://www.ogbus.ru/authors/Astvatsatur'yan/Astvatsatur'yan_1.pdf (in Russian)
The new approached model of movement of gas in the pipelines is developed, allowing to expect processes of non-stationary current of gas in gas mains in view of inertia of a stream. Comparison of results of calculations on the given model with the exact analytical decision initial linearized systems of the equations of transport of gas is lead.
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20.08.07, A.V. Grunvald
USAGE METHANOL IN THE GAS INDUSTRY AS AN INHIBITOR OF HYDRATE FORMATION AND FORECAST OF ITS CONSUMPTION IN THE PERIOD UNTIL 2030
http://www.ogbus.ru/authors/Grunvald/Grunvald_1.pdf (in Russian)
In operating procedures such as upstream, gas treatment and transfer, hard gas hydrates lead to serious problems based on the processes abnormality.
Traditional and main method of hydrate formation prevention in gas industry is usage of hydrate inhibitor - methanol.
Specific dispensable rates of methanol consumption as an inhibitor of hydrate formation depend directly on the composition of the extracted natural gas and also technology of preparing the natural gas to the transportation. The article contains the detailed examination of this dependence and also the forecast of methanol consumption in the gas industry in the period until 2030.
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13.07.07, M.V. Semukhin
INTERACTION OF MULTILEVEL MODELS DURING OPTIMIZATION OF OPERATING CONDITIONS OF A NETWORKED INTERFIELD GATHERING LINE
http://www.ogbus.ru/authors/Semukhin/Semukhin_2.pdf (in Russian)
The throughput optimization or output pressure maximization algorithm includes three-level characterization models: i.e. original characterization in a form of a system of nonlinear algebraic equations; linearized characterization vs. unknown costs and pressure squares; and solution of a linear programming task at each step of iteration. Given that a gathering line structure is complex and large, the 4th level of characterization in a form of "black box" model with a sensitivity function may be introduced before running linear programming.
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11.07.07, M.V. Semukhin
MULTILEVEL SYSTEM OF MODELS TO COMPUTE OPERATING CONDITIONS OF NETWORKED INTERFIELD GATHERING LINE AND GAS COLLECTING SYSTEMS
http://www.ogbus.ru/authors/Semukhin/Semukhin_1.pdf (in Russian)
A three-level gas production system that helps to collect, treat and perform interfield transport of the gas produced is assumed. The basic algorithm to compute operational conditions of a networked interfield gathering line and gas collecting systems includes two-level characterization models: i.e. original characterization in a form of nonlinear algebraic equations; and linearized characterization vs. unknown costs and pressure squares or as a simplified tree-type structure.
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02.07.07, V. Agapchev, M. Fattakhov
CALCULATION OF HYDRAUDYNAMIC PARAMETERS OF PIPELINES REPAIRED WITHOUT TRENCHING USING POLYETHYLEN PIPES
http://www.ogbus.ru/eng/authors/Agapchev/Agapchev_3.pdf
The paper describes features of hydraulic frictions calculation for pipelines repaired using polyethylene pipes. Effective formulas are given to determine the hydraulic friction coefficient for various zones of fluid flow in a pipeline.
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29.05.07, Sajjad Mubin, U.A. Goryainov
CONSTRUCTION AND OPERATION OF PIPELINE PROJECTS IN PAKISTAN - ASSOCIATED RISKS AND THEIR SOLUTION
http://www.ogbus.ru/eng/authors/Mubin/Mubin_1.pdf
Looking its high energy demand, Pakistan is planning to import natural gas through pipelines from neighboring countries. For fully utilizing the imported gas, providing it to end customers, the infrastructure of gas pipeline is being developed. Therefore a huge investment is being carried out in this sector. During the last 10 years the network of main and distribution gas pipeline has been expanded by 85%. But the geological and geographical conditions of Pakistan are tough for the construction. On one side there are glaciers and high mountains, on the other side there is desert and plan of river Indus with extensive network of wide rivers and canals. There is always risk of earthquake, landslides and floods. Instable Government policies, high rate of inflation, rapid change in material prices are also important risk factors. Looking the current geopolitics situation there is a persistent threat of war and terrorism in the country. All these factors make the situation very complex in quantifying the risk factors especially when the project is gas pipeline in which the impact factor of risk exponentially rise in case of risk occurrence. Moreover, due to the absence of modern project or risk management techniques and methodologies the projects are usually not completed in their planned time or budget. Effort has been made to quantify the associated risks of gas pipeline project on the basis of historical data. The research will be helpful to separate the most important risks from the trivial many for the construction of any sort of pipeline project in the northern areas of Pakistan.
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13.03.07, R.O. Samsonov
GEOECOLOGICAL RISK MANAGEMENT BY OPTIMIZING THE COMPRESSOR PLANT OPERATION AT THE NATURAL GAS MAIN PIPELINES
http://www.ogbus.ru/eng/authors/SamsonovRO/SamsonovRO_2e.pdf
http://www.ogbus.ru/authors/SamsonovRO/SamsonovRO_2.pdf (in Russian)
The approaches for optimizing the ecological risk management in the impact areas of compressor stations of natural gas main pipelines are considered based on the minimization of energy consumption. The relevant mathematical models for the given optimization task are suggested. As a pilot project the main pipeline "Central Asia - Center" is selected aimed the increasing gas transport and reconstruction. The emission optimization calculation and critical loads for emitted pollutants on the impacted ecosystems are carried out. The economical speculations are suggested to include the preventive ecological damage.
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12.03.07, A.S. Kazak, R.O. Samsonov
THE SYSTEM ANALYSIS IN TASKS AIMED AT MINIMIZATION OF GEOECOLOGICAL RISKS AT COMPLEX GAS MAIN PIPELINES
http://www.ogbus.ru/eng/authors/Kazak/Kazak_1e.pdf
http://www.ogbus.ru/authors/Kazak/Kazak_1.pdf (in Russian)
The methodology of application of the system analysis and the relevant mathematical models for optimization of gas flows in complex gas transportation systems (GTS) are considered taking into account the gas pipelines emissions' environmental impact. The proposed approach allows the researcher to estimate the level of geoecological risks at separate sections of pipelines and rank the GTS subsystems by this index. In turn, it permits to single out the pipeline sections sets, where the management solutions and measure have to be undertaken in order to decrease the level of geoecological risks. The stage of the system synthesis envisages the possibility of the geoecological risk assessment during operation of the whole system.
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01.03.07, R.O. Samsonov
MODERN PRINCIPLES OF FORMING AND DEVELOPING THE NATURAL GAS PIPELINE SET OF THE RUSSIAN FEDERATION
http://www.ogbus.ru/eng/authors/SamsonovRO/SamsonovRO_1e.pdf
http://www.ogbus.ru/authors/SamsonovRO/SamsonovRO_1.pdf (in Russian)
The principles and basic concept are considered to carry out the expert system for facilitating the creation and assessment of various adequate scenarios for strategic development of gas industry in Russia.
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18.11.06, T.I. Lapteva
SIMULATION OF LEAK FORMATION PROCESSES AND LEAK DETECTION IN PIPELINE
http://www.ogbus.ru/authors/Lapteva/Lapteva_2.pdf (in Russian)
The paper describes leak formation molds and criteria of their detections. Simple cases of formation only pressure jump and velocity jump are described and are researched.
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23.08.06, S. Pavlov, V. Pavlov, S. Plekhanov, O. Saubanov
USE OF THE GIS OF THE PIPELINE COMPANY FOR PRESENTATION OF INPIPE DIAGNOSTIC RESULTS
http://www.ogbus.ru/authors/Pavlov/Pavlov_1.pdf (in Russian)
The article describes application of geoinformation system for presentation of the inpipe diagnostic results for pipeline maintenance works support. Cooperation of the GIS with the diagnostic system and data processing algorithm are depicted.
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23.06.06, L. Latyshev, Z. Nasyrova
DETECTION SYSTEM OF ILLEGAL PENETRATION INTO A PIPELINE
http://www.ogbus.ru/authors/Latyshev/Latyshev_1.pdf (in Russian)
The aim of this work is the development of a detection system of illegal penetration into a pipeline, which is included in existing pipeline telecontrol system. Comparative analysis of existing methods of leak detection was done. And it showed that these methods are not efficient for detection of illegal penetration, because they are short time and have a small volume of leak. In this case, application of method, described in this work, is a rather efficient. This method is based on measuring and analysis of acoustic waves in pipeline metal, which arise during the attempt of penetration. The structure of measuring devices for realization of this method was selected with the help of the invariation theory in measuring technics. Application of this theory allows to eliminate the dependence of measuring result on extraneous factors. Using the multichannel principle - the main principle of the invariation theory - proportions for determination of approximate place of penetration by a chosen structure of measuring device were found. Besides, the algorithms and the programs were created for realization of this method.
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25.04.06, A.V. Valyushok, A.G. Gareyev, I.G. Blinov, A.A. Nasreyev
CLASSIFICATION OF OIL-AND-GAS PIPELINE SECTORS EXPOSED TO ELECTROCHEMICAL CORROSION WHEN EXPLOITED
http://www.ogbus.ru/authors/Valyushok/Valyushok_1.pdf (in Russian)
The oil-and-gas pipeline classification existing in industrial protection sphere is based on the unit danger class, which is dependent on such factors as the transported product type, the pipeline diameter and its working pressure, its remoteness from the nearest settlement and also the pipeline construction and laying conditions.
Long distance underground pipeline failure statistics show that every third failure is caused by electrochemical corrosion the influence of which is underestimated when the potential danger of the unit is defined. In connection with this the authors put forward a complex approach to the definition of the pipeline sectors danger that takes into consideration the main factors decreasing the underground oil-and-gas pipeline exploitation safety.
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17.04.06, R.N. Karimov, V.V. Mochalov, A.A. Reyter
THE ANALYSIS OF THE TECHNICAL INCIDENCES STREAM IN THE GAS DISTRIBUTION SYSTEM
http://www.ogbus.ru/authors/KarimovRN/KarimovRN_1.pdf (in Russian)
This article is the fist stage of analysis of determines the quantitative indicators of gas distribution system maintenance. The goal of this work is to analyze and model the time series of technical incidence with city gas equipment. Authors carry out analysis with such modern mathematical and statistical methods as wavelets and singular spectrum analysis. The investigated time series was modeled by the sum of seasonal and trend - cyclic components and the stationery stochastic process.
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21.02.06, V. Ayduganov, L. Volkova, T. Lapteva
EXPERIENCE OF CONSTRUCTION AND OPERATION PIPELINES FROM METAL-PLASTIC TUBES
http://www.ogbus.ru/authors/Ajduganov/Ajduganov_1.pdf (in Russian)
This paper describes questions of new technology, equipment application in the field of construction oil-field pipelines from lined polyethylene steel tubes with one-piece quick union. Practical experience of metal-plastic tubes use produces in fields of gas-and-oil producing companies.
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26.01.05, R.A. Harisov, A.R. Habirova, F.M. Mustafin, R.A. Habirov
THE MAIN REASONS OF ORIGIN OF ISOLATING COATINGS DEFECTS
http://www.ogbus.ru/authors/Harisov/Harisov_2.pdf (in Russian)
In the article analysis of the basic reasons of origin of isolating coatings defects is carried out. The main reasons are:
- application of poor-quality or inappropriate isolating materials;
- poor-quality drawing of primer onto a pipeline;
- defects arising at drawing of polymeric isolating tapes;
- defects arising at isolating and stringing works and backfilling of a pipeline;
- mechanical influences of ground during operation resulting in shearing or stretching stresses in isolating coatings, followed by stress cracking and formation of corrugations, scorings, scratches and flutes;
- physicochemical influence of ground, influence of surface active components of ground colloidal environment resulting in evaporation and washing away of plasticizing agents from isolating coatings;
- misuse of a pipeline (sharp temperature difference of product transported, pumping of a product with temperature above the designed one, etc.);
- poor quality of electrochemical protection measures (the potential difference "pipe - ground" is higher or lower than the admitted one, etc.);
- non-adherence to the modes of isolating materials drawing in winter conditions - disturbance of the modes of pipeline preheating, primer drawing, isolating coatings drawing and storage;
- freezing of pipeline isolating coating together with water saturated ground.
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21.01.05, R.A. Harisov, A.R. Habirova, F.M. Mustafin, R.A. Habirov
UP-TO-DAY STATE OF PIPELINES CORROSION PROTECTION WITH POLYMERIC COATINGS
http://www.ogbus.ru/authors/Harisov/Harisov_1.pdf (in Russian)
Modern condition of pipelines protection from corrosion with help of polymeric coatings is analyzed. It is marked that the technology of pipelines protection from corrosion by polymeric coatings is being improved because main oil and gas pipelines are expensive and metal-intensive constructions, therefore polymeric coatings more than years should planned for the work during all the useful life of apipeline – 35 years and more.
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17.09.04, A. Trofimov, V. Kutsev, E. Kocherian
NON-ISOTHERMAL MODEL OF GAS TRANSPORTATION
http://www.ogbus.ru/authors/Trofimov/Trofimov_2.pdf (in Russian)
New approach of the analytical decision linear systems of the unsteady & non-isothermal equations describing processes of transport of gas in the pipeline is offered in work. Calculation of non-isothermal mode for an operating natural gas pipeline is resulted.
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28.05.03, Garris N., Garris Yu.
DYNAMIC CHARACTERISTIC APPLICATION IN OPERATING CONDITIONS CALCULATION OF MAIN NON-ISOTHERMAL OIL-PRODUCT PIPELINES
http://www.ogbus.com/eng/authors/Garris/Garris_3e.pdf
The calculation algorithm is represented in an integral form. The pipeline dynamic characteristic is defined as a set of combined characteristic of the pumps, plot of the required pump head, a grid of instant characteristics drawn with temperature or viscosity pitches, and additional temperature curves as well. The method of dynamic characteristics enables the change of pipeline hydraulic resistance, it can be used for any flow model fluids, it has been approved in operating main and industrial pipelines, having the software.
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07.04.03, Kutukov S.E., Bakhtizin R.N., Shammazov A.M.
GAS CONGESTION INFLUENCE ON PIPELINE SYSTEM CURVE
http://www.ogbus.ru/eng/authors/Kutukov/Kutukov_7e.pdf
Gas-air congestion is one of the typical operational mode deviations in pumping of oil and petroleum, which reduces the pipeline system capacity on an average 30:60%. The development of measures for pipeline capacity support on designed level is faced up a crucial problem of parametric diagnostic system for hilly terrain pipelines.
The qualitative and quantitative estimation methodology of possible capacity reduction for a pipeline section with gas congestion is suggested. Monitoring of pressure distribution along pipeline length allows revealing and observing their accumulation and migration in time.
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24.03.03, Kutukov S.E., Bakhtizin R.N.
HYDRODYNAMIC PRECONDITIONS OF GAS CONGESTION IN LIQUID PIPELINE
http://www.ogbus.ru/eng/authors/Kutukov/Kutukov_5e.pdf
Hydrodynamic preconditions of existence and migration of gases congestion are discussed. Hydrodynamic model of stratified flow in a hilly terrain pipeline is suggested, that allows to predict the possible location of gas congestions in the pipeline from engineering point of view. There is shown an influence of terrain features on pipeline capacity as a physical pattern in the paper.
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28.03.2002, Ismagilov I., Garris N., Asadullin M., Askarov R.
IMPULSE TEMPERATURE INFLUENCE ON STRESS-CORROSION CRACKING OF BIG-DIAMETER GAS MAINS
http://www.ogbus.com/eng/authors/Garris/gar_e.pdf
After solving the inverse task of heat conductivity on the basis of processed temperature fields of the initial part of 1420 mm gas pipeline Polyana-Moskovo the results were obtained that establish the fact of heat conductivity and ground humidity change not only along the pipe contour but in the course of time as well. During continuous observations impulse humidity change (1,5…2 times and more) in the zone of pipeline outer surface contact with the ground was fixed synchronous to the temperature change of the gas flow.
Based on the researches made it is possible to conclude that impulse change of pipe wall temperature causes synchronous change of the adjoining ground temperature and humidity. This fact may be regarded as the impellent that activates electrochemical corrosion and bio-corrosion. This phenomenon reveals itself in discrete stress cracking of metal and in the direction of maximum development of stress.
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11.12.2001, R. Nabiev, I. Budilov, R. Nasyrov
EVALUATION OF STRENGTH OF OIL PIPELINES WITH DEFECTS TAKEN INTO CONSIDERATION
http://www.ogbus.com/eng/authors/Budilov/evaluation.pdf
Damages of oil pipeline’s sections during the maintenance put it often out of operation or cause temporary stops, which as the result involves considerable financial costs. Therefore, the elaboration of efficient methods is an actual task for the estimation of possible consequences of damages and destructions of some sections and oil pipeline as a whole taking into account real defects. Such estimation requires a fulfillment of complex research works, both of destruction mechanisms and kinetics of growth of weary defects and cracks
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11.12.2001, S.Ĺ.Ęutukov
Heat exchange of pipelines in the severe geo- cryological and hydrological ambient under macroclimatic and seasonal conditions
http://www.ogbus.com/eng/authors/Kutukov/heat.pdf
The heat&mass transfer of a transported product with embracing environment is a complex composite process, on which the determinate and statistical models for a omnifarious technological problem solutions of pipeline operating are created.
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11.12.2001, R. Zaripov, G. Korobkov, R. Khasanov, V. Chichelov
MAINTENANCE OF STRENGTH OF MAIN PIPELINES, OPERATING IN NON-STANDARD CONDITIONS
http://www.ogbus.com/eng/authors/Zaripov/mainofstrength.pdf
A mathematical model of a stressed-deformed condition of the pipeline having big sagging, commensurable with the pipe radius is proposed. A non-linear statement of the task of a bar’s long-cross bend (a pipeline model) allow to take into consideration real conditions of the pipelines’ maintenance, laid in areas with watered, ever-frozen and landslide grounds as well as with sub-surfaced cavity of various origin. Initial equations, an algorithm of their decision are given, as well as an example of the research of a stressed-deformed condition of a gas pipeline, passing over karst formations, under operational and weather-climatic loads.
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11.12.2001, Y. Spector, O. Denisov, A. Shchepetov, V. Alexandrov, A. Gruzdev
STEEL TANK UNDERLAY REHABILITATION IN ACCORDING TO THE TECHNICAL INSPECTION
http://www.ogbus.com/eng/authors/Spector/steeltank.pdf
For oil and oil products storage tank batteries are equipped with the vertical cylindrical steel tanks with the volume capacity up to 50 thousand m3. The tanks are the complicated engineering constructions, extremely sensitive to the differential settlements of soil bases which provoke lack of parallelism, rakes and a tank form change. When a tank hydraulic testing, the differential settlements and rakes often occur that exceed the standard values. Tank bases and pads evaluation includes settlement determination, engineering- geological survey, technical state inspection. According to the evaluation results, the conclusion on the possibility of the subsequent tank service and, if necessary, the recommendations on repair and reconstruction of the base are given. The main methods of a tank base repair and reconstruction are soil stabilisation, pads strengthening, penetration of piles of different construction.
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11.12.2001, S. Kutukov, R. Bakhtizin, R. Nabiev, S. Pavlov, A.Vasiliev
SIMULATION METHOD OF PIPELINE SECTIONS RANKING BY ENVIRONMENMTAL HAZARD DUE TO OIL DAMAGE SPILL
http://www.ogbus.com/eng/authors/Nabiev/simulation.pdf
Geoinformation modelling serves as a methodological basis for development of means for prognosis of environmental and social consequences of accidents at trunk pipelines. One of numerous aspects of this problem is fragmentation of a pipeline into linear objects by environmental characteristics including technical state and probable environmental and social consequences of an accident. Rational planning of the pipeline linear section overhauls, declaration of industrial and environmental safety, development of valid standards for the pump station emergency service and other aspects depend on the correct solution of these problems. When making management decisions under the conditions of uncertainty or limited initial information a comparative assessment (ranks) of probable accident consequences at these pipeline sections should become an effective means for determining the required reliability level of a trunk pipeline section.
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11.12.2001, A. Shammazov, B. Mastobayev, A. Lokshin, R. Bakhtizin, R. Bikmetov
MAINTENANCE OF OPENED RESERVOIRS OF OIL PUMPING STATIONS OF MAIN OIL PIPELINES
http://www.ogbus.com/eng/authors/Lokshin/maintenance.pdf
Based on the fulfilled research works, the fact of the existence of the opened reservoirs in the system of oil transport and storage is examined, their purpose and influence on the surrounding objects. Physical and chemical properties of oil products, existing in the opened reservoirs were considered.
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11.12.2001, S. Kutukov, F. Badikov, G. Samigullin
APPLICATION OF INTELLECTUAL SYSTEMS IN MONITORING OF OIL PIPELINES OPERATION MODES
http://www.ogbus.com/eng/authors/Kutukov/applicationofint.pdf
The application of expert systems in monitoring of trunk oil pipelines operation modes increases considerably a reliability of the maintenance, due-time control, reduces costs for technical service due to the descent to the mode of “repair as per condition”, enlarges possibilities of ecology monitoring and technical genetics.
On the analytical basis of the up-to date technical pipeline diagnostics achievements, the methodology of the system’s “training” based on the configuration (architecture) of multi-layer network is shown in this paper, allowing to describe adequately system’s behaving standards, and perspectives of the informative system application are outlined. The quantitative estimation algorithm of the functional deviation (passage contraction of offshore oil-field “White Tiger” collector identified by the Delphi technique) is explained by graphic analogues.
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11.12.2001, Khafizov A., Chebotarev V., Dudov A., Besprozvannj A., Umergalin T.
RESOURCE SAVING TECHNOLOGY WITH THE COLLECTION, PREPARATION AND STORAGE HYDROCARBON RAW MATERIAL
http://www.ogbus.com/eng/authors/Khafizov/resourcesaving.pdf
Herein the problems of reduction of technological losses hydrocarbon of raw materials and reagent at oil producing the enterprises are considered. The new technologies applied to the solution of this problem are analyzed. As the basic idea the technologies based on the processes momentary adsorbtion and disorbtion are offered, and it is offered to use pipelines as technological devices for absorption of petrol fractions from petroleum and natural gas, preliminary drainage of natural gas in dilatable chambers and gas pipelines, disorbtion of a sated watermethanol solution by a warm gas.
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11.12.2001, A. Gumerov, G. Zhuravlev, S. Rafikov, E.Gorbanenko
THE ESTIMATION OF TECHNICAL STATE OF MARINE PIPELINES
http://www.ogbus.com/eng/authors/Gumerov/estimation.pdf
Procedures of calculation of stress-deformation state of the most hazardous submarine pipeline sections are considered, an example of the calculation is given.
In the oil fields under development in the shelf of Vietnam marine pipelines for offshore pumping of high- solidification oils, gas-liquid mixtures, gas and water to maintain formation pressure are in operation. The constructive design of pipelines is performed without sea bottom penetration.
As is shown by the world practice, the main causes of failures of such pipelines in operation can be damage from ship anchors, internal and external corrosion of pipes, excessive bends in vertical and horizontal planes, wear of pipelines at the intersection points, damage resulting from metal fatigue caused by waves, currents, changes in pressure and temperature of a product being pumped, bottom deformation and sagging of pipelines, damage caused by construction work in the immediate proximity to pipelines.
To ensure reliable and trouble-free operation of marine pipelines and to make a timely decision regarding time and type of repair one should possess true information about technical condition of these pipelines. In case of impossibility of using traditional methods of checking required parameters, applied for pipelines laid on the ground, it becomes necessary to develop and to update the procedures of obtaining such parameters by theoretical methods.
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11.12.2001, J. Faitli
PRESSURE LOSS CALCULATION MODEL FOR WELL-GRADED SOLID-LIQUID PIPE FLOWS ON THE BASIS OF SYSTEMATIC PILOT PLANT INVESTIGATIONS
http://www.ogbus.com/eng/authors/Faitli/pressureloss.pdf
If a well granulated bulk solid material is separated into narrow particle fractions by size and the pressure loss curve of each fraction is measured in a given pipe a limit particle size can be determined.
The flow of the smaller fractions and the water can be described as a continuum with own suspension density and rheological properties. This is called fine suspension flow. The pressure loss curve of the coarse fractions and water flow has a minimum point, the continuum model is hard to be applied. This is called coarse mixture flow. In a given pipe only the particle size determines whether the flow is fine suspension or coarse mixture. In case of a coarse mixture flow the particles can be suspended or settled as function of the actual flow rate. When the coarse particles are suspended, this is the case of the many empirical equations, of which the first one was proposed by Durand. Mechanical friction loss of the settled and sliding particles can be correlated by the two-layer model.
On the basis of this point of view a pressure loss calculation method has been developed. The material parameters in the model can be measured by a systematic test by a tube viscometer. A hydraulic test loop and a tube viscometer with three different pipes have been built and experiments were carried out by glass sand from Fehérvárcsúrgó and fly-ash from the Power Plant of Mátra, both located in Hungary.
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11.12.2001, L. Tihanyi, E. Bobok, T. Bodi
A NEW MODEL FOR BLOW-OFF OF A GAS PIPELINE
http://www.ogbus.com/eng/authors/Bodi/newmodel.pdf
The authors worked out a calculation process and software for calculating the working conditions of blow-off systems at technological stations of gas pipelines. One part of the examined system is the closed gas pipeline section, the other is the blow-off pipe provided with a control valve. To create the model they analysed the blow-off process, on the basis of which the simplifying assumptions were determined. The calculation model gives non- steady values of pressure, temperature and the gas flow at chosen points of the system. In the second part of the article the authors present the application of the calculation algorithm with the help of examples for all the three control options. On the basis of the results the changes in the blow-off gas flow and after all the venting time can be seen for each control method,. The elaborate calculation process and software can be used either to plan new flare systems or to analyse the working conditions of existing systems.
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