https://nv.nung.edu.ua/index.php/nv/issue/feed Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas 2021-03-03T12:27:52+02:00 В.В. Михайлюк nvjournal@nung.edu.ua Open Journal Systems <p>The subjects of the “<strong>Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas</strong>” Journal deal&nbsp;with scientific production activities in the sphere of oil and gas industry complex and include&nbsp;the following sections:</p> <ul> <li class="show">Material mechanics;</li> <li class="show">Mechanical engineering;</li> <li class="show">Information programs and computer-integrated technologies.</li> </ul> https://nv.nung.edu.ua/index.php/nv/article/view/735 Installation of improved technical facilities for further development of gas-bearing formations at the drilling process 2020-12-16T11:24:36+02:00 M. M. Roi ongp1@ukr.net <p>As a result of developed new methods of researching gas wells for stationary and non-stationary gas inflows to the bottom of the well, a new prospect looms in one actually worked out study mode. It consists in the fact that research can be performed not only in cased wells. This, to a certain extent, brings the study closer to testing formations while drilling. Practically, this idea is still far from being realized. Although this does not mean that one should not strive to approach her. Indeed, such attempts are already known and they were successful for shallow well depths. These attempts have identified the needs and indicated the direction of improvement in terms of technological methods and technical means. The equipment quality itself also plays an important role. As deeper depths require better quality equipment. Because we can talk about unstable reservoirs and possible high pressures of gas products. Naturally, such problems should be addressed in a comprehensive manner. That is, both technological approaches and technical means to meet their needs shall be considered simultaneously. It is clear that it is impossible to take into account all these needs in one publication. Therefore, the goal was to touch upon the issue of improving technical means for the study of gas wells in the process of drilling. The quality of technical equipment shall satisfy the conditions of reliability not only when working in a high pressure environment. It should provide the ability to perform tasks assigned to the technical means on the one hand. On the other hand, to obtain reliable research results. Because the requirements for the actual data of one tested study mode are very high. Since the subsequent processing of the research data will provide an opportunity to obtain the gas-hydrodynamic parameters of studied formations. And on their basis, the question of productive characteristics and prospects of the objects under study will be decided. This publication proposes an improved drillable packer and flush lock-off valve as advanced equipment. They belong to the underground equipment complex. Together with other test equipment, they provide testing of gas-saturated formations in the trial operation mode.</p> 2020-12-30T00:00:00+02:00 Copyright (c) 2021 Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas https://nv.nung.edu.ua/index.php/nv/article/view/741 Determination of cam parameters of fixation node of the device for unscrewing of stuck pipes in the well 2021-01-13T10:40:43+02:00 S. Yu Havryliv lana.grivnak@gmail.com M. M. Liakh mm.lyakh@gmail.com Yu. L. Havryliv meson1959@gmail.com R. O. Deineha deynega2004@ukr.net V. V. Tyrlych deynega2004@ukr.net <p>Improvement of repair work efficiency in the elimination of drill pipe accidents in a well is an extremely urgent task of oil field enterprises, and is achieved using special devices and tools. This paper analyses research and publications on this topic. The authors patented a device for unscrewing pipes in a well, in the fixation unit of which the use of a block of eccentric cams was proposed, and its experimental working model was made for research in a casing with a nominal diameter of D = 114 mm. The cycle of the device for unscrewing pipes in the well consists of three main periods: free running, jamming of the carrier of the device for unscrewing stuck pipes and the period of wedging. The article analyses operating conditions of the device fixation unit in the first two periods. The dependences of the power and geometric parameters of the device fixation unit on the angle of rotation of the cams are derived. Formulas are proposed for determining the force of pressing the cams against the casing during free travel, the moment of friction forces and power for this case. The dependence of the maximum permissible initial jamming angle on the friction coefficient and the geometric parameters of the device has been established. The lifting angle of the working surface of cams is determined. After substantiation of additional parameters of the block of cams to fulfill the condition of strength of its materials, it is planned to test a device for unscrewing pipes in an industrial environment in Factorial LLC, Poltava.</p> 2020-12-30T00:00:00+02:00 Copyright (c) 2021 Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas https://nv.nung.edu.ua/index.php/nv/article/view/742 Comparative experimental studies of the operation process of the inertial planetary mechanism of screw conveyors 2021-01-25T16:15:03+02:00 V. M. Karetin kvm.tntu@gmail.com P. D. Stukhliak kvm.tntu@gmail.com <p><em>The results of experimental studies of the technological process of the inertial safety clutch for two options and two cases of determining the braking torque of the output shaft: a combination with a reverse and a parasitic gear; combinations without reverse and with parasitic gear; combinations with reverse and without parasitic gear; combinations without reverse and without parasitic gear are given. The functional nature of the change in the brake torque of the output shaft has been investigated. The plan of the factorial experiment was chosen, the limit intervals</em></p> <p><em>or limit levels of variation (initial, or upper and final, or lower limit of change) of each individual input factor were set: the speed of the input shaft of the inertial safety clutch and the gear ratio. A histogram of non-approximated experimental data of the braking torque of the output shaft of the inertial safety clutch is constructed. On the basis of comparisons and analysis of graphical constructions of the diagram of the change in the braking torque of the output shaft of the inertial overload clutch for various combinations, it can be stated that: the process of operation of the inertial overload clutch using the reverse and with the parasitic gear provides a slight increase in the braking torque of the output shaft of the inertial overload clutch in on average by 3%; the process of operation of the inertial overload clutch without the use of reverse and with a parasitic gear practically does not provide an increase in the braking torque of the output shaft of the inertial overload clutch. On the basis of a comparative analysis, reasonably rational parameters of an inertial safety clutch at which its "stop" mode of operation is achieved.</em></p> 2020-12-30T00:00:00+02:00 Copyright (c) 2021 Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas https://nv.nung.edu.ua/index.php/nv/article/view/744 The investigation of forces' component during frictional hardening of cylindrical surfaces of machine parts 2021-02-01T14:17:50+02:00 V. I. Gurey vgurey@gmail.com <p>Friction treatment refers to methods of surface hardening (strengthening) using highly concentrated energy sources. After processing in the surface layers of the parts a hardened (reinforced) white layer with a nanocrystal-line structure is formed. Friction treatment of the cylindrical surfaces of the samples was performed on an upgrad-ed lathe (model 16K20), on which instead of a tool-post was installed a special device for autonomous tool drive. A metal disk made of steel 45 is used as a tool. Mineral oil with active additives containing polymers was used as a technological medium in the process of friction treatment. A special dynamometer was developed to study the components of the force that occurs in the contact area of the tool-part during the frictional hardening of the cy-lindrical surfaces of the parts. The immovable elastic elements of the dynamometer are fixed on conical holes in the rear headstock and spindle. To make rotation impossible of the elastic element in the spindle, it is mounted in the adapter bushing through the bearings. Studies have shown that the modes of friction treatment significantly affect the normal Py and the tangential component Pz of the force that occurs in the contact area of the tool-part. The increasing of the part’s rotational velocity slightly affects into magnitude of the force components that occurs in the contact area of the tool-part during processing with the longitudinal feed S = 0.3 mm/rev and the depth of pressing the tool into the workpiece t = 0.1 mm. When increase the depth of pressing the tool into the workpiece from 0.1 to 0.3 mm and part’s rotational velocity equal n = 40 rpm, the normal force component Py increased from 380 N to 690 N, and the tangential component Pz – from 28 N to 47 N. And in that the same time increasing the part’s rotational velocity to 125 rpm leads to an increase the normal component Py from 510 N to 1160 N, and the tangential component Pz – from 38 N to 69 N.</p> 2020-12-30T00:00:00+02:00 Copyright (c) 2021 Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas https://nv.nung.edu.ua/index.php/nv/article/view/733 Computer optimization of cooling systems 91 for thermoplastics molding 2021-01-04T15:34:38+02:00 L. O. Borushchak xrystyk97@gmail.com I. O. Shuliar xrystyk97@gmail.com N. V. Ilkiv xrystyk97@gmail.com S. V. Okrepkyi xrystyk97@gmail.com <p>The work analyses the problem of high-quality cooling of molds for obtaining castings from thermoplastics, which are characterized by significant coefficients of volumetric and linear thermal expansion, the ability to compact in the molten state. The change in the volume of the thermoplastic melt and, accordingly, product quality characteristics primarily depend on the mold temperature mode. The latter provides for the required temperature, heating rate and cooling rate of the mold. In turn, these parameters partially determine the pressure of the thermoplastic in the working volume. The heating rate and cooling rate of the mold are primarily determined by the dimensions and configuration of the channels of the mold cooling system. Experimental improvement of the design of the cooling system channels requires significant expenditures of materials, time and money. The authors of the article proposed a method for optimizing the design of a mold cooling system using computer technologies for 3D modeling in the Solid Works environment and thermodynamic studies using the finite element method in the ANSYS program. In the first part of the work, several versions of virtual models of the main structural parts of a mold for casting a thin-walled real product from a thermoplastic were created: dies, punches and mounting plates. At the same time, the main structural dimensions of the mold were maintained and necessary structural simplifications were made (inscriptions, stamps were removed) in order to save resources when performing thermodynamic studies. The differences between the models were in the different configurations of the water cooling channels - straight, V- and W-shaped. These studies were carried out in the Transient Thermal package. The main task of these studies was to determine the nature of the propagation of thermal fields in the volume of the matrix. Initial data for research - mold temperature, temperature and volumetric supply of coolant in all experiments are the same. The results of computer studies have shown that in a cooling system with W-shaped channels, the cooling of a thermoplastic casting occurs most uniformly, as evidenced by the configuration of thermal fields in the die and the punch. Based on research materials, a mold was made. Test results have confirmed efficiency of computer research in plastic molding technologies.</p> 2020-12-30T00:00:00+02:00 Copyright (c) 2021 Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas https://nv.nung.edu.ua/index.php/nv/article/view/746 Methodology for monitoring the technical 106 condition of GPU type GTK-25i in the process of operation 2021-03-03T12:27:52+02:00 L. M. Zamikhovskyi leozam@ukr.net O. L. Zamikhovska leozam@nung.edu.ua V. V. Pavlyk leozam@nung.edu.ua <p><em> </em></p> <p>In the early 1980s, 120 gas compressor units (GPU) type GTK-25i were installed on the Urengoy-Pomary-Uzhgorod transcontinental gas pipeline, and three of them are in operation at CS-39 “U-P-U” of the Bogorodchansk Linear Production Department of trunk gas pipelines. Today, about 80% of GPU type GTK-25i have worked out the established service life, or those close to it. Their further operation does not ensure reliable and efficient operation, and therefore numerous failures and accidents occur, leading to significant economic losses. Methods of parametric and vibroacoustic diagnostics of GPU are analyzed. It is noted that the most fruitful years of development of the methods of vibroacoustic diagnostics of GPUs are the 70-90s of the last century. Today, their development is taking place in the direction of using modern information technologies and various transformations in the processing of vibroacoustic processes to identify diagnostic signs of the technical state of the GPU. The methods of diagnosing GPU type GTK-25i the analysis showed their absence. The exception is certain methods of their diagnostics based on modern information technologies, which were developed by the authors of the article. At the same time, the carried out improvement of the automatic control system (ACS) of the GPU type GTK-25i in terms of its technical and software makes it possible to obtain information about additional, in comparison with the standard ACS, technological parameters of the GPU type GTK-25i operation and vibroacoustic processes that accompany its operation. and can be used to create diagnostic methods for GPU type GTK-25i. The methodology for monitoring the technical condition of GPU type GTK-25i based on the determination of the highest values of the discriminant functions for each of the three technical states of GPU type GTK-25i for 16 technological parameters and acoustic and vibration characteristics is considered. At the same time, the best "nominal" condition is considered to be the state of GPU type GTK-25i after the repair work, the "defective" state "- before the repair work, and" current "- after the corresponding operating time of the GPU type GTK-25i. The use of the technique made it possible to develop a complex method, which is a combination of parametric and vibroacoustic diagnostics methods. It is shown that the use of the proposed method allows tracing the trend of changes in the technical state of GPU type GTK-25i in time and predicting the moment of its decommissioning. The developed method does not require additional technical means for its implementation, as it receives information from the improved ACS GPU type GTK-25i, which, in turn, can use the diagnostic results to control the gas compression process, taking into account the technical condition of the GPU type GTK-25i. </p> 2020-12-30T00:00:00+02:00 Copyright (c) 2020 Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas https://nv.nung.edu.ua/index.php/nv/article/view/736 Assessment and prediction of robotic performance of long-term operated drill pipes 2020-12-14T11:56:58+02:00 Ye. І. Kryzhanivskyy o.vytyaz@gmail.com О. Yu. Vytyaz o.vytyaz@gmail.com R. S. Hrabovskyi o.vytyaz@gmail.com <p>The problem of monitoring and preventing deposit inundation is becoming increasingly important in Ukraine. The solution to this problem is one of the ways to ensure the energy independence of the state. The operation of producing wells is complicated by the accumulation of liquid at the bottom. Subsequently, it leads to premature shutdown of the wells. Inundation determines the need to isolate the influx of formation water. Considering the significant residual reserves of gas trapped in water, it is important to improve existing technologies and to develop new ones for the development of depleted fields under the conditions of dynamic water drive in order to ensure maximum hydrocarbon recovery rates. This paper summarizes domestic and foreign field development technologies under water pressure conditions and analyzes the main disadvantages and advantages of the existing methods of stimulating hydrocarbon inflows in waterlogged gas and gas condensate wells. The main factors that determine the causes and nature of flooding of productive formations and ways to prevent them are analyzed. Based on the results of the analysis of laboratory and experimental studies, the behavior of gas trapped by brine water has been established.But the issue of determining the localization of residual reserves has not been studied sufficiently. Considering the above mentioned ideas, the author asserts the necessity to and to use geological and technological models constantly. It ensures better extraction of the residual gas from depleted fields under the condition of intensive advance of reservoir water into productive formations. In the case of adapting the three-dimensional model to the actual data of the production history and the simulation of the exact breakthrough of produced water in production wells, there comes the possible to determine the most promising zones and sections of the field, the reservoirs of which are characterized by the best filtration-capacitive properties and significant gas reserves. The use of a constantly operating geological and technological model of the field will make it possible to develop ways of extracting the residual gas reserves trapped in produced water, to improve existing production technologies and to ensure maximum recovery factors.</p> 2020-12-30T00:00:00+02:00 Copyright (c) 2021 Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas https://nv.nung.edu.ua/index.php/nv/article/view/734 Bearing capacity of steel fiber reinforced concrete with different fiber types 2020-12-18T12:26:22+02:00 M. G. Surianinov sng@ogasa.org.ua S. P. Neutov sng@ogasa.org.ua I. B. Korneieva sng@ogasa.org.ua D. B. Velychko sng@ogasa.org.ua <p>The paper presents study results of the load-bearing capacity of fibroconcrete during dispersed reinforce-ment with steel fiber of three different types - anchor, flattened and corrugated. In all experiments, fiber was added in an amount of 1% by volume, which, as established in the preliminary tests conducted by the authors, is the op-timal percentage of reinforcement. The tests were performed on prisms and cubes measuring 100x100x400 mm and 100x100x100 mm, respectively, aged for 28 days.Four groups of prisms and cubes were manufactured. One - from usual concrete (with the sizes of large aggregate to 10 mm) of the C20/25 class, and three more - with different types of fibers. Each group consisted of six samples. All tests were performed on a press specially prepared for this purpose. Clock-type indicators, one for each, were attached to the side surfaces of the prisms to measure longitu-dinal deformations during loading. The load was applied in equal steps with a holding time of 10 minutes. The test results are presented in the form of graphs of the dependences of the relative deformation on the stress and in tab-ular form. When testing the cubes, only the maximum loads were recorded, due to the impossibility of stable fixing of sensors. It was found that the load-bearing capacity of steel fiber does not depend on the fiber type, but its pres-ence in the concrete changes the nature of the destruction of the sample. Instead of instantaneous brittle destruc-tion, a slow current process is observed, and the prism does not disintegrate into separate parts, but remains a single array with through cracks; fiber fibers keep it from final destruction. Prisms with steel fiber content with-stood loads 11% higher than concrete samples. The use of steel fiber improves not only the load-bearing capacity, but also the deformability. The relative longitudinal deformation of reinforced concrete was on average 36% higher than that of concrete due to the presence of pseudoplastic deformation phase in fibroconcrete.</p> 2020-12-30T00:00:00+02:00 Copyright (c) 2021 Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas https://nv.nung.edu.ua/index.php/nv/article/view/732 Development of a tool for conical thread frictional hardening and tests of its operation 2020-12-17T12:38:58+02:00 I. P. Taras pryhorovska@gmail.com L. Ya Ropyak pryhorovska@gmail.com T. O. Pryhorovska pryhorovska@gmail.com M. Y. Burda pryhorovska@gmail.com O. V. Pryhorovskyi pryhorovska@gmail.com <p>The article considers the problem of designing a tool for friction hardening to increase the fatigue strength for conical threaded joints of elements of oilfield and drilling equipment. To increase the fatigue strength, a tool was developed for frictional strengthening of the working surface of the thread. The proposed design of the tool solves the current problem of simultaneous strengthening of depressions and side surfaces of the conical notch, which provides an increase in both fatigue strength and wear resistance. The design dimensions of the developed tool are determined using geometric modeling. The scientific novelty of the developed tool design is to solve the problem of simultaneous strengthening of depressions and surfaces of the conical groove profile, namely different lengths of the side surfaces of the conical groove, by modifying its lateral deforming elements. This simplifies the manufacture of the tool, increases the stability of the tool, the stability of the parameters of the reinforced layer of the working surface of the profile of the conical keyway on the elements of drill strings, and this improves the quality, productivity and efficiency of friction reinforcement of conical keyholes. Hardening was carried out on a lathe 16K20. The following hardening modes were selected: maximum rolling force - 20 kN. The maximum processing speed is 20 m / min. Experimental studies of fatigue strength on the machine IMA-50 threaded parts of oilfield equipment made of steel 40HN, reinforced with the proposed tool. During the development of the method of testing the parts for fatigue strength, a method of loading the sample according to the scheme of pure bending by rotation was adopted. It was found that the fatigue strength of reinforced parts made of 40HN steel was 1.15-1.2 times higher than the fatigue strength of non-reinforced parts made of the same material. The main factors that increase the fatigue strength of the conical threaded connection of parts have been identified.</p> 2020-12-30T00:00:00+02:00 Copyright (c) 2021 Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas https://nv.nung.edu.ua/index.php/nv/article/view/738 Influence of binder content on physical and mechanical properties of composite materials such as metal powder-waxy substance 2021-01-05T15:52:12+02:00 V. P. Bondarenko o.o.matviichuk@gmail.com O. O. Matviichuk o.o.matviichuk@gmail.com О. О. Khusein o.o.matviichuk@gmail.com K.Ye Kutakh guluro17@gmail.com O. V. Yevdokymova olga.v.mashkova@gmail.com I. O. Hnatenko gnatenko_i@ukr.net M. O. Tsysar tsysarmaksym@gmail.com <p>The scientific basis for the development of working materials from waxy highly filled composites for FDM 3D printing using is not yet sufficiently developed. The need to develop such composites is due to the fact that highly filled waxy composites, on the one hand, have low 3D printing temperatures, and on the other hand, the fact that the waxy substance has a low ash content and is completely removed during annealing and subsequent sintering of the residual framework from the filler. Therefore, in this work, the influence of the binder content on the physical and mechanical properties of composite materials such as metal powder - waxy substance in the ratio of metal to waxy substance, as 50/50, 60/40, 70/30, 80/20 % (by volume), as well as the shape change of composite samples when they are heated at a temperature from 61 to 230 °C. Carbonyl nickel and carbonyl iron were used as metal powder, and beeswax and paraffin were used as a binder. It was found that the developed surface of particles significantly affects the density dependence, the microhardness and compressive strength of composites from the binder content, the actual density of the composite samples after pressing is less than the calculated by the additivity formula with the binder content up to 40 % (by volume) and only with an increase in the binder content to 50 % (by volume) does the actual density approach the calculated additive; the developed surface of nickel particles several times increases the strength of the composite in comparison with iron at the same binder content, at the same time, the dependences of the microhardness differ significantly: on Ni-wax samples, it tends to decrease with an increase in the wax content, and on samples Fe-paraffin - to an increase, which is due to the influence of such phenomena as adhesion and cohesion, mechanical adhesion. The level of strength of composite samples with a binder content of 40-50 % (by volume) is sufficient so that they do not collapse not only in 3D print head The resulting experimental data can be extended to other similar systems when creating working materials for FDM 3D printing based on carbonyl nickel and iron powders.</p> 2020-12-30T00:00:00+02:00 Copyright (c) 2021 Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas