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 RES. 2018. Issue 4
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.
Salnikov A. V. Industrial refining of oil in the North of Russia in the XVIII century: «a chemical factory» owned by F. S. Pryadunov
In the series of articles, the development and the current state of the issue of industrial oil bifurcation in the North of Russia in the 18th century are considered. Based on the analysis of the sources discovered to date, the background and possibilities of the development of oil refining, produced on the Ukhta River in the period from 1746 to 1767, are considered. This article attempts to summarize the results of research on this issue, conducted in the middle of the twentieth century.
Ivanov S. L., Ivanova P. V., Kuvshinki S. Y., Shibanov D. A. Assessment of the impact of weather and climate factors on the fault tolerance of the equipment of the mineral complex
(Russian) В статье указаны факторы, влияющие на работоспособность технологических машин нефтяной и горной отраслей промышленности при их круглогодичной работе в условиях внешней среды. Рассматривается влияние погодноклиматического фактора на работоспособность таких машин Погодно-климатический фактор является одним из наиболее неблагоприятных – с ним связано 17 % отказов механического оборудования машины. Предложено учитывать влияние погодно-климатического фактора на работу карьерных экскаваторов через комплексный показатель – индекс жесткости погоды, учитывающий влияние параметров как холодного, так и жаркого климата на протяжении всего календарного времени работы машины.
Birillo I. N., Shishkin I. V., Kuzbozhev P. A.Research of influence and nature of the dynamic loading of technological pipeline of gas-distribution station
(Russian) В процессе эксплуатации газораспределительной станции на технологической трубопроводной обвязке узла редуцирования, помимо статической нагрузки от давления транспортируемого газа (трубопровод высокого давления), наблюдается динамическая вибрационная нагрузка (трубопровод низкого давления). В статье описаны результаты исследования механических характеристик металла трубопроводной обвязки, приведен сравнительный анализ показателей механических характеристик относительно условий эксплуатации. Исследован и визуализирован характер динамической нагрузки на узле редуцирования.
Yagubov Z. Kh., Shichev P. S. To the question of the development of the structure of an automated system for technical diagnostics of pumping units in oil mines
In the article sets out forth recommendations for resolving general issues related to the organization of an automated monitoring and control system for the technical diagnostics of pumps operated in oil mines. Submitted a generalized structure and description of the composition and functions of the levels of the typical automated diagnostic system, submitted a principled the order of the work of the system. Designated the general requirements for control and measurement, operation and signaling equipment of the automated diagnostic system. It is noted availability the necessary’s to create a system of devices serially produced by domestic manufacturers. It is noted availability the necessaries devices to create systems that are serial releasing by domestic manufacturers. Keywords: technical diagnostics, automated system for techni