Oil and Gas Power Engineering http://nge.nung.edu.ua/index.php/nge <p>The journal publishes materials based on the results of scientific and productive activity in the field of oil and gas complex in the following directions:</p> <p>Geology, exploration and geophysics of oil and gas fields</p> <p>Scientific and technical problems of petroleum engineering</p> <p>Materials, structures and equipment of petroleum complex facilities</p> <p>New solutions in modern equipment and technology</p> IFNTUOG en-US Oil and Gas Power Engineering 1993-9868 The application of nitrogen to increase gas recovery from depleten gas deposits http://nge.nung.edu.ua/index.php/nge/article/view/461 <p><em>The research results on residual natural gas displacement from depleted gas deposits by various non-hydrocarbon gases are analyzed. The use of nitrogen for this purpose is proved. The research results and industrial experience in obtaining nitrogen from air and purifying nitrogen from the products of gas production wells in case of nitrogen injection into depleted gas deposits to increase gas recovery are summarized.</em></p> R. М. Kondrat L. I. Khaidarova Copyright (c) 2018 Oil and Gas Power Engineering 2018-11-14 2018-11-14 2(30) 7 16 10.31471/1993-9868-2018-2(30)-7-16 Estimation of mechanical energy consumption of the drill string in rotary drilling http://nge.nung.edu.ua/index.php/nge/article/view/466 <p><em><span style="vertical-align: inherit;"><span style="vertical-align: inherit;">The article is devoted to the study of dynamic phenomena in the drill string based on energy positions. The<br>friction of mechanical transmissions in rotor drive, curved sections of the drill string on drill-hole walls in the<br>drilling mud and change in the torque on the bit are the main causes of the mechanical energy consumption in the<br>process of drilling. In this case, the required engine power is used for to provide drill string rotation in the well with<br>some unevenness and bottom-hole deepening.&nbsp;</span></span></em></p> <p><em><span style="vertical-align: inherit;"><span style="vertical-align: inherit;">The power balance equation of the mechanical system “power drive–drill string–bottom hole” is analyzed. The<br>authors have developed the problem for defining the kinetic energy of drill string in rotor drilling, which is spent on<br>overcoming the friction in drive transmissions and drill string on drill-hole walls in the drilling mud as well as on<br>drilling the bottom hole. The use of the defined mathematical dependencies is demonstrated by the nomograph for<br>determining the friction power in case of drill string free run in the well. The obtained results of theoretical<br>research can be used by engineering and manufacturing divisions of drilling enterprises for the engineering<br>estimate of energy consumption in rotary drilling. </span></span></em></p> I. I. Chudyk Ya. S. Hrydzhuk L. R. Yurych Copyright (c) 2018 Oil and Gas Power Engineering 2018-11-21 2018-11-21 2(30) 17 24 10.31471/1993-9868-2018-2(30)-17-24 Challenges in the system approach to controlling the dynamic processes in gas pipeline system networks http://nge.nung.edu.ua/index.php/nge/article/view/469 <p><em>The article analyzes the adequacy and completeness of informative parameters of gas pipeline system with high branching of processing routes and analytical complexity of dynamic processes in the energy resource <br> transportation. The problems of parameter informatization of these processes are highlighted and the main tasks <br> for optimizing the control system of gas transmission system are defined. The investigation results of the diverging informative parameters of natural gas chemical properties at different levels of its supply are presented.</em></p> S. O. Maksymiuk I. I. Vysochanskyi O. M. Karpash Copyright (c) 2019 Oil and Gas Power Engineering 2019-04-03 2019-04-03 2(30) 25 31 Investigation of the properties correlation of physical and mechanical characteristics of ferromagnets based on magnetoelastic sensors of mechanical stresses http://nge.nung.edu.ua/index.php/nge/article/view/470 <p><em>The determination of the stress condition is a topical issue. At present, various non-destructive examination methods, such as strain gauge, magnetic, ultrasonic methods, and others are used to analyze pipelines stress <br> condition. Each of them has its advantages and disadvantages. There is often the need to use several experimental non-destructive methods simultaneously. In this regard, the magnetic inspection holds a unique position. In this case a significant role is played by primary transducers, which directly perceive the effect of mechanical stresses and turn it into the electrical signal for further processing of the input information. The change of magnetic characteristics is closely connected with the physical effect on the monitored object. The advantages include the high mobility of equipment, the ability to perform control without the direct contact of transducer with the object under study. At the same time, there are several disadvantages inherent particularly in the magnetic methods – magnetoelastic <br> hysteresis, in which there is the divergence of induction values during loading and unloading. The greatest <br> divergence occurs in the lead-off cycle and decreases during repeated cycles. The best way is to embrace the <br> complete information available in the hysteresis loop. Another method is not only to take measurements at one point&nbsp;(even if this measurement is carried out in two mutually perpendicular directions), but to perform surface sounding of the object in a certain plane. Therefore, the most efficient method is to compare the magnetic relief of loaded (in the structure) and unloaded (in reserve) pipes of one manufacturer and from one lot. Thus, using the examination method of pipelines stress condition, based on the evaluation of metal magnetic properties of pipes, creates the complex solution to the problems of reliability improvement of pipeline systems.</em></p> V. V. Tsyhanchuk L. S. Shlapak Copyright (c) 2019 Oil and Gas Power Engineering 2019-04-03 2019-04-03 2(30) 32 39 Ways of increasing the energy efficiency of Ukraine's gas transmission system http://nge.nung.edu.ua/index.php/nge/article/view/475 <p><em>The ways of reducing the consumption of energy sources, which increase the efficiency of natural gas use at compressor stations are considered. The energy-efficient technologies in gas supply systems, namely the expander-generator technology, the use of secondary energy resources and “Aquarius” production units are analyzed. The ways of increasing the energy efficiency and rational use of energy resources to control main gas pipelines are defined.</em></p> M. B. Kuzyk M. O. Karpash Copyright (c) 2019 Oil and Gas Power Engineering 2019-04-04 2019-04-04 2(30) 40 43 Experimental research of dependence between informative parameters NDT techniques and steel physical and mechanical properties http://nge.nung.edu.ua/index.php/nge/article/view/471 <p><em>Research of new methods and technologies of non-destructive control of change of long-term metal structures is an actual task of the present. In this article the methodology and results of experimental studies, the main aim of which is to determine the correlation between the intensity of structural noise in the material determined by failure detectors based on ultrasonic field-induced phase grating and the physical and mechanical properties of steels are presented.</em></p> N. I. Chaban Copyright (c) 2019 Oil and Gas Power Engineering 2019-04-03 2019-04-03 2(30) 44 48 The influence of phase load asymmetry on power losses in power distribution network lines of oil and gas enterprises http://nge.nung.edu.ua/index.php/nge/article/view/472 <p><em>The influence of phase load asymmetry on power losses in electric lines is investigated. The influence of phase load redistribution on power losses in three-phase three-conductor line with the insulated neutral is analyzed. It is demonstrated that additional power losses occur in this line which are in quadratic dependency on the relative change of phase loads. The influence of neutral conductor resistance in the four-conductor three-phase electric network on power losses in different asymmetry modes is investigated.&nbsp; It is shown that power losses in this network are much larger than in three-conductor network with identical phase load asymmetry and depend on the neutral conductor resistance. Significant economic effect can be obtained by increasing the cross-section of neutral conductor. At the same time, the simultaneous decrease of power losses and increase of the operational reliability of electric network are observed.</em></p> Yu. F. Romaniuk O. V. Solomchak V. M. Chornous Copyright (c) 2019 Oil and Gas Power Engineering 2019-04-03 2019-04-03 2(30) 49 54