The aim of the presented work is to show the possibility of estimating the crack resistance of a pipeline with a surface crack located on the inner side of the wall using the recorded deformation response on the outer surface during loading / unloading of the pipeline. The solution of this problem is carried out in two stages: at the first stage, the localization and geometrical parameters of the defect are determined on the basis of mathematical processing of displacements fields of points on the pipeline surface in the defected area recorded by optical methods. At the second stage, the singular and nonsingular terms of stress expansion in the vicinity of the crack front are calculated to apply the crack resistance criteria of the so-called two-parameter fracture mechanics.
Posts in category 25.00.00: Earth Science
Chernyatin A. S., Razumovsky I. A., Zorin A. E., Zorin N. E.Evaluation of the crack resistance of a pipeline with an internal crack by the deformation response on the outer surface
Nikulin S. A., Karnavsky E. L., Aginey R. V.Research of efficiency of security electrochemical protection from corrosion for pipelines prepared for reconstruction with method “pipe in pipe”
The questions of recovering protective potential on underwater transitions of pipelines, in the presence of damages of insulating covering are considered. The way of ensuring security by means of laying of extended anode grounding in a conducting cover is considered. Use of a conducting cover with various specific electric resistance is offered. By results of mathematical modeling it is proved that application of a conducting pipe with various specific electric resistance allows to achieve more rational distribution of potentials with reduction of current of station of cathodic protection.
Kamenskikh S. V., Ulyasheva N. M.Evaluation of the effect of buffer liquids on the intensity of destruction of filter cakes in casing
The article deals with the problem of removal from the wall of the wellbore formed by drilling mud filter cake, which, on the one hand, greatly reduces further penetration of the flushing liquid into the reservoir, and on the other prevents a reliable separation of the seams while cementing casing. In the work conducted and presents the results of laboratory tests for the assessment of washing ability of different buffer liquids, including solutions of inorganic salts (electrolytes) with the addition of the stabilizer is CMC as using additional reagents (NTF and Atren SA), and without them. Based on the conducted experiments and investigated the dependence of the cleaning ability of buffer liquids of the type and concentration of drilling fluids, inorganic salts and additional reagents, etc.
Vasilyev S. I., Ortman A. S., Zhubrin V. G., Neudachin D. V.The results of the study of the characteristics of seasonally frozen soils, insulated with urea foam
The possibility of protecting soils from seasonal freezing, to reduce their strength during construction and remediation of oil and gas fields development sites, is considered. The results of the study of the temperature and strength of the soil in the range of regional depths of seasonal freezing from 100 mm to 1200 mm are presented, graphs of the temperature of the soil in this depth range depending on the ambient temperature and the period of soil freezing are obtained. The minimum acceptable thickness of carbamide foam is justified.
Dudnikov V. Y., Osadchaya G. G.Formation of the content of training at the USTU, taking into account the cryological aspect
The article notes the need to strengthen the adaptation of the educational pro-cess in the areas of training and specialties of the USTU to the northern specifics. The experience of formation of the content of teaching at the University is given, taking into account the cryological aspect of the basic educational program of the training direc-tion 05.03.06 Ecology and Nature Management.
Salnikov A. V., Shcherbatyuk Y. V.Evaluation of the effectiveness of the use of solvents for cleaning small-diameter pipelines from asphalt-tar-paraffin deposits
In the article the questions of the estimation of the effectiveness of the use of the solvents Azol 4020, Nefras-S2-80 / 120, toluene (methylbenzene), acetone (dimethyl ketone), n-hexane for the cleaning of small diameter pipelines from asphalt and resin paraffin deposits. The results of laboratory studies on the effect of changing the tem-perature of the solvent and the rate of washing on the removal efficiency of asphalt-tar-paraffin deposits from such piping are presented.
Nekuchaev V. O., Mikheev М. M.Influence of heat treatment and ultrasound on the viscosity of high-paraffinic oil of the Kyrtaelsk deposit of Komi Republic
The paper studies the flow curves, from which the values of viscosity, high-par-affin oil of the Kyrtael field of the Komi Republic at low temperatures, exposed to heat (heat treatment) and ultrasonic treatment. It is shown that the effect of acoustic treat-ment on the rheology of the oil is similar to the effect of heat treatment when heated to the same temperature. Heating up to 80°C significantly reduces the viscosity and thix-otropic properties of Kyrtael oil at low temperatures at both heating methods. Heat treatment and ultrasonic heating to temperatures in the range of 40-60 °C significantly worsen the same rheological properties.
Kuzin A. V.Problems and prospects of geological study siliceous strata sublatitudinal 20 km north Yekaterinburg
Studied strata sublatitudinal chert, siliceous shale, mudstone, siderite, occurring in sub-vertical position. Power thickness of more than 5 km stretch from west to east 20 km. Objective – to determine the direction of incidence strata of sources and deploy-ment time, formation type column and its metallogenic specialization. Methods – con-ducting electric and magnetic survey, radiometric shooting on the local area, sam-pling, study of thin sections and polished sections. The plot is located in the central part of the area of known mineralization elliptical arsenic species, sulfosalts, tellu-rides, controlling its placement in the southern part of Berezovsky, and in the north – Blagodatsky gold deposits. Overall precipitation flyschoid sequences assigned to the formation. It was found north direction cut capacity, the presence of dislocation frac-ture, metasomatic sericite-calcite-sulfide study species, the presence of layers of hem-atite schist by siderite. The density, magnetic susceptibility, radioactivity, electrical resistivity of various lithological varieties of rock strata in the samples and in situ. The presence of clay layers of tape, allegedly formed in the Cenozoic-Neogene in the res-ervoir, the bottom and the shores of which were presented siliceous shales occurring in sub-vertical position. Dextral dislocation flyschoid thickness and its inclination to the north occurred before the introduction of the Carboniferous in the large Verch-Iset granodiorite massif, before the formation of the average thickness of the Devonian volcanic rocks of andesite formation. Results can be used to predict the deposits of oxidized iron ore, gold mineralization on the electrochemical barrier at the intersec-tion of gold-bearing dykes of granite porphyry and hematite schists.
Terentyev A. A., Durkin S. M.A comparison of the different approaches of the forecast of technological parameters of development of deposits high-viscosity oils
As the reserves of light oils are developed more and more ahead of time, the problem of involving abnormally viscous oils and bitumens in the active development of huge resources becomes more and more urgent from year to year. The experience of laboratory and field studies accumulated to date shows that the most effective and industrially developed technology for the development of such resources is thermal methods of oil production. One of the most important tasks in the design of fields is to predict the volume of oil production. It is extremely important for the management of
oil companies to determine the payback period based on the forecast of recoverable products. In this work is the calculation of the technological parameters of thermal-mining development for the sector B mining unit 2T-4, which will be developed mod-ernized thermal-mining system. Forecasting of productive characteristics was per-formed using numerical modeling, construction of one-factor statistical regression on the actual data of experimental sites OPU-2 bis, OPU-3 bis and using an analytical method for calculating technological indicators of development.
Kamenskikh S. V., Ulyasheva N. M.Evaluation of the effect of buffer liquids on the intensity of destruction of filter cakes in casing
he article deals with the problem of removal from the wall of the wellbore formed by drilling mud filter cake, which, on the one hand, greatly reduces further penetration of the flushing liquid into the reservoir, and on the other prevents a reliable separation of the seams while cementing casing. In the work conducted and presents the results of laboratory tests for the assessment of washing ability of different buffer liquids, including solutions of inorganic salts (electrolytes) with the addition of the
stabilizer is CMC as using additional reagents (NTF and Atren SA), and without them. Based on the conducted experiments and investigated the dependence of the cleaning ability of buffer liquids of the type and concentration of drilling fluids, inorganic salts and additional reagents, etc.
Burkov P. V., Dudnikov V. Yu., Osadchaya G. G.Increasing the bearing capacity of soils during the construction and operation of oil and gas industry facilities
The need to improve the operational reliability of oil and gas facilities in the cryolithozone by increasing the carrying capacity of soils through the use of technology and technical means to control their physico-chemical properties is indicated.
Zorin A. E., Zorin N. E., Chernyatin A. S.A development of approaches to service long-term operated oil and gas pipelines
The article substantiates and proposes a new concept for the maintenance of oil and gas pipelines in their long-term operation, which is based on use of extended information about the current condition and actual features of the operation analyzed areas. Presented the results of experimental research and development, in terms of obtaining non-destructive rapid assessment of the metal pipes condition, testing of metal pipes, studies of the impact of operational factors on the performance of pipelines, allowing to implement the proposed concept.
Mustafin F. M., Chen Qun, Halikov R. R., Mustafin O. F.Improving the passive corrosion protection system of pipelines
In this work provides an overview of the corrosion process and presented the results of scientific researching works by department “Construction and Maintenance of Oil and Gas Pipelines and Storages” aimed at improving the protection of metal structures from corrosion.
Voronik A. M., Kamenskikh S. V., Ulyasheva N. M.Analysis and estimation of parameters of the lightweight corrosion resistant grouting mixture
The article presents theoretical and laboratory studies to determine the technological properties and parameters developed by the authors lightweight corrosion resistant cement blend designed for well cementing cementing serovodoroda in highpermeability rocks. Analyzed in detail the existing formulations of cement slurries and mixtures used in the cementing of wells in the conditions of acquisitions and hydrogen sulfide aggression. Researched and established based on the basic technological properties and parameters of the developed lightweight corrosion resistant grouting mixture concentration and particle size of the granulated foam glass.
Nekuchaev V. O., Mikheev D. M.Method and results of the investigation of the field of permanent magnets action on the rheology of anomalous oils of the Timan-Pechora Oil and Gas Province
In this paper, we investigated the effect of a magnetic field on the flow curves and the viscosity of anomalous oils in the flow-through processing mode and com-pared the results with the effect of heat treatment. An experimental setup was devel-oped to study the effect of a constant magnetic field of different configurations on the rheological characteristics of oils in steady state and flow-through conditions.
Sitnikov A. V., Dudnikov V. Y., Osadchaya G. G. To the issue of the volume of engineering surveys that provides for the minimization of risks associated with the operation of pipeline oil and gas transportation facilities in the permafrost zone
In the article on a concrete example of insufficient consideration of the com-plexity of engineering and geological conditions of construction, a conclusion is made about the need for an integrated approach to the study of territories, both within the scope of research for the projected object and the adjacent one.
Durkin S. M., Menshikova I. N.Effect of dissolved gas in oil to technological development indicators under thermo-roasting method of oil production
Hydrodynamic modeling of the Yarega oilfield block was considered for the first time. The block is developed by thermo-mining method. Influence of dissolved gas in oil on technological indicators of development is considered. The positive effect was revealed of dissolved gas on oil production. The mode of the dissolved gas is activated when heat is applied to the reservoir of the Yarega oilfield. Activa-tion factors: oil viscosity reduction; separation of dissolved gas from oil; tempera-ture expansion of free gas. The current energy state of the reservoir makes it possi-ble to use the hydrodynamic model without taking into account the dissolved gas. Problems in numerical modeling are revealed. These problems are related to the quality of the source information. The authors have developed recommendations for eliminating problems.
Vlasova A. V., Salnikov A. V.Development of a coupler made of fiberglass composite fibrous materials for the repair of oil pipelines in the Arctic shelf
The article deals with the development of a coupling design made of fiber-glass composite fibrous materials for the repair of oil pipelines in conditions of low temperatures. Based on the analysis of existing repair couplings and non-metallic constructions and harsh conditions for the operation of pipelines in the Far North and the Arctic shelf, the design of a coupling is proposed that allows repairing oil pipelines with various defects, including through-holes.
Shammazov I. A.The application of the theory of catastrophes in the diagnosis of tube bundles of gas air-cooling apparatus at compressor stations
The article deals with the application of the theory of chaos in the diagnostics of tube bundles of gas air coolers at compressor stations. On the basis of the works carried out, it has been established that periodic cleaning of the surfaces of gas air-cooling apparatuses, taking into account the local state of the surfaces of the apparatuses, is ineffective. Based on the theory of catastrophes, a method for estimating the state of the surface of air-cooling devices is proposed, which makes it possible to analytically monitor the intensity and nature of the accumulation of contaminants.