CONTENTS of journal "THNP" 4•2018 (Russia)
DESIGN, CONSTRUCTION AND OPERATION OF GAS AND OIL PIPELINES AND STORAGES
EVALUATION OF THE STRESS-STRAIN STATE OF THE PIPELINE BEFORE THE WITHDRAWAL FOR REPAIR (P. 5-10)
IVANTSOVA S.G., Dr. Sci. (Tech.), Prof. of the Department of Pipeline and Storage Facilities Construction and Rehabilitation
BUDZULYAK B.V., Dr. Sci. (Tech.), Prof. of the Department of Pipeline and Storage Facilities Construction and Rehabilitation, President SRO Associationof Gas and Oil Complex Builders
Gubkin Russian State University of Oil and Gas (National Research University) (65, korp.1, Leninskiy pr., 119991, Moscow, Russia).
E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript., E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ABSTRACT
Due to the need to ensure operational reliability and environmental safety of trunk pipelines, large-scale programs for the reconstruction of pipeline systems are being implemented. As part of the reconstruction, according to the results of in-line diagnostics, an assessment of the technical condition of the pipe is carried out, based on the determination of stresses in its wall, but not taking into account a number of significant factors, namely: natural and deformation aging of steel, fatigue of the metal of pipes; exponential pattern of growth of corrosion defects with increasing stress levels during operation. A quantitative analysis of these factors makes it possible to adequately assess the condition of the pipeline section to be repaired, taking into account residual stresses accumulated in the pipe wall by the time the site is decommissioned. The article proposes an assessment of the stress-strain state of a worn-out pipeline based on the theory of linear accumulation of damage, taking into account coefficients and dependencies that take into account aging processes, hardening and fatigue of pipe steel in the defective zone.
KEYWORDS: pipeline, diagnostics, pipe wall, defect, stress-strain state, steel, fatigue, cycle, re-static loading, damage summation, hazard assessment, hardening factor, aging factor, concentration coefficient, repair.
CALCULATION OF PIPELINE EMPTYING TIME BY THE GRAVITY INTEGRAL OUTFLOW MODEL (P. 11-16)
GALLYAMOV V.M., Lead Engineer
Transneft Urals, JSC (10, Krupskoy St., 450077, Ufa, Russia).
AIDAGULOV I.T., Master of the Department of Transport and Storage of Oil and Gas.
YANBARISOV T.A., Master of the Department of Transport and Storage of Oil and Gas.
KARIMOV R.M., Cand. Sci. (Tech.), Department of Transport and Storage of Oil and Gas.
MASTOBAEV B.N., Dr. Sci. (Tech.), Prof., Head of Department of Transport and Storage of Oil and Gas.
Ufa State Petroleum Technical University (USPTU) (1, Kosmonavtov St., 450062, Ufa, Russia). E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript., E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ABSTRACT
Here you can see the review of results to determine to determine the pumping parameters using the integral model of the flow, previously described in [1,2]. An algorithm has been developed for calculating the elevations of the profile of an empty sloped section, in which the flow regimes change. The algorithm helps to automate the calculations of the emptyingpipeline time in the presence of several flow modes in the emptyingpipeline process, successively replacing each other from the maximum initial to the minimum final pumping flow. For approbation of the proposed model, a laboratory installation was developed, representing a pipeline with a variable profile of an inclined section. The carried out model tests with the subsequent comparison of the measured actual value of pipeline emptying time with the calculated one, obtained by two methods – the traditional graphic-analytical method according to [5] and the newly proposed method [1], showed high accuracy of the latter. The use of an integrated flow model for calculating the pipeline emptying time turned out to be higher in accuracy than the graphic-analytical method with 100 iterations. Within the framework of the comparison, the estimation of the errors of the traditional graphic-analytical method with a different number of iterations (calculation steps) and the newly proposed integral model of expiration was made. Analysis of the comparison results showed that even with an increase in the number of iterations in the grapho-analytical method, its accuracy is lower due to the appearance of a systematic error, depending on the quality of the graphical source data (profile resolution) and the number of accepted averages at each calculation step. The advantage of the integrated model of the expiration from the point of view of the possibility of its automationdue to the developed algorithms is substantiated. A prototype of the program for determining the pipeline emptying parameters using the integrated calculation model is presented.
KEYWORDS: pipeline, pipelineemptying, integral flow model, calculation of pumping volume and time, method, algorithm, flow regime, calculation program.
APPLICATION OF GRANULATED FOAM GLASS AS A COATING OF THE EVAPORATION MIRROR OF OIL TANKS (P. 17-21)
SHATSKIKH E.S., Postgraduate Student of the Department of Pipeline and Storage Facilities Construction and Rehabilitation
LEVIN S.N., Assoc. Prof. of the Department of Pipeline and Storage Facilities Construction and Rehabilitation
PISAREVSKIY V.M., Dr. Sci. (Tech.), Prof. of the Department of Gas and Oil Pipelines Engineering and Operation
Gubkin Russian State University of Oil and Gas (National Research University) (65, korp.1, Leninskiy pr., 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 assesses the different types of materials used for the construction of pontoons and floating roofs, and the method of coating the evaporation mirror of oil tanks using granular foam glass.
KEYWORDS: tank, pontoon, floating roofs, losses, volcanic ash, granulated foam glass.
ADAPTATION OF THE MATHEMATICAL MODEL OF THE OIL TRUNK PIPELINE AS THE PROCESS OF TRAINING THE NEURAL NETWORK (P. 22-31)
NEKRASOV I.V., Cand. Sci. (Tech.), Software Solution Architect
“GE Rus” LTD (General Electric Intelligent Platforms) (10, Presnenskaya Nab., 12331, Moscow, Russia).E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ZHAGFAROV I.F., General Manager
LLC Center of Industrial Analytics (2, apart. 9, 108811, Moscow City, Moscow St., Moscow, Russia). E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
DOLZHIN M.V., Leading Specialist
Giprotruboprovod JSC (24-1, Vavilova St., Moscow, 119334, Russia).
ABSTRACT
The articlу deals with the questions of the accuracy of modeling of hydrodynamic processes in oil trunk pipelines (TP). The problem of the influence of errors of the initial parameters of modeling on the degree of coincidence of the calculated and measured pressure profiles along the MN is considered in detail. The authors analyzed the approach to the refinement of the initial data on the results of cyclic modeling sessions, called «the process of adaptation of the mathematical model». Despite the wide application of this approach in practice, especially at the stages of implementation of computer models on real objects, the adaptation procedure itself is currently poorly formalized and is based to a greater extent on the experience of personnel performing the adjustment of mathematical models of TP. In the present work the problem of mathematical model adaptation is considered from the point of view of neural network methods formalism. In particular, an analogy is drawn between a configurable computer model of MN and a multilayer neural network of an unknown structure. The authors propose criteria for evaluating the accuracy of modeling, close in physical sense to the criteria for evaluating the output signals of the neural network, which allowed us to consider the process of adaptation of the mathematical model of MN as a process of learning the network and apply effective teaching methods to improve the accuracy of the model design pressures relative to real measurements in the pipeline. Application of the neural network method of training is considered on the theoretical example of MN for which exact values of altitude marks and coordinates of control points of pressure are unknown.
KEYWORDS: trunk pipeline (TP), the pressure profile in TP, adaptation of the mathematical model, the accuracy of the simulation, neural network, neural network training, an altitude profile of TP, the coordinates of the control points (CP) of the pipeline.
APPLICATION OF HEAVY OIL DEPOSTITS AS THERMAL INSULATING LAYER IN MAJOR PIPELINES (P. 32-39)
KHASANOV I.I., Cand. Sci. (Tech.), Associate Prof. of the Department of Transport and Storage of Oil and Gas
SHAKIROV R.A., Master Student of the Department of Transport and Storage of Oil and Gas
LEONTYEV A.YU., Postgraduate Student of the Department of Hydraulic and Gas Dynamics of Pipeline Systems and Hydraulic Machines
LOGINOVA E.A., Engineer
Ufa State Petroleum Technological University (USPTU) (1, Kosmonavtov St., 450062, Ufa, Republic of Bashkortostan, Russia). E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ABSTRACT
The article consists the study of a problem concerning deposits of asphalts, resins, and paraffins formation on the inside surface of major pipelines during pumping paraffin oils. The article gives a detailed analysis of the main reasons of asphalts, resins, and paraffins deposits formation and their negative influence on pipeline transportation processes. Much attention is given to the basic methods of removal these heavy oil deposits (and their disadvantages) for the purpose of cleaning pipelines from already shaped formations. The question of utilization heavy oil deposits as an inside thermal major pipeline isolation is also investigated, moreover it is shown, that this type of isolation improves pipeline characteristics. According to executed work there were designated the main directions of next researches in order to make possible applying the method of creating additory isolation layer in practice.
KEYWORDS: paraffin, heavy oil deposits, diagnostics, major pipeline.
RHEOLOGICAL MODELS OF NON–NEWTONIAN OILS FLOWS (P. 40-42)
MUSTAFAYEVA G.R., PhD (Tech.), Assoc. Prof., Department of Industrial Safety and Labour Protection
Azerbaijan State University of Oil and Industry (34, Azadlyg Ave., AZ 1010, Baku, Azerbaijan Republic). E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
ABSTRACT
The article devoted to the nature and patterns of the flow of non-Newtonian oils which are determined by the influence of the velocity gradient on the shear resistance. An equation describing the rheological curve of non-Newtonian fluids is considered and their features are characterized. Also in the paper shown curves characterizing the rheological properties of various liquids Characteristic models of highly concentrated liquids flows reflecting the dependence of the effective viscosity on the stress and shear rate are advanced.
KEYWORDS: rheology, non-Newtonian liquid, velocity gradient, shear stress, effective viscosity.
AUTOMATION OF PRODUCTION PROCESSES
AUTOMATIC CONTROL OF THE SUBSURFACE PUMP DELIVERY (P. 43-45)
RZAEV A.G., Dr. Sci. (Tech.), Prof., Chief Researcher
Institute of control systems of NAS of Azerbaijan (9, B. Vahabzade, Baku, Azerbaijan Republic, AZ 1141). E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
RASULOV S.R., Dr. Sci. (Tech.), Prof., Department of Industrial Safety and Labour Protection
Azerbaijan State University of Oil and Industry (34, Azadlyg Ave., Baku, Azerbaijan Republic, AZ 1010). E-mail: Адрес электронной почты защищен от спам-ботов. Для просмотра адреса в вашем браузере должен быть включен Javascript.
BABAYEV S.F., Doctoral Student
Institute of control systems of NAS of Azerbaijan (9, B. Vahabzade, Baku, Azerbaijan Republic, AZ 1141).
ABSTRACT
In the article, three schemes of automatic control of the subsurface pump delivery are considered. A method has been developed for controlling the pump feeding processes, which consists in regulating the stability of the subsurface pump delivery while maintaining a constant dynamic level of liquid in the production column. The liquid level is controlled by changing the frequency of rocking the rocker`s balance. The pressure on the flow line of the borehole and the mouth of the tubing is also measured. A device is proposed for implementing the recommended method of automatic control of the pump feeding process.
KEYWORDS: the subsurface pump, regulation, borehole, well production, dynamic level, control unit.
