bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of shock-vibration loads of drilling equipment on the drilling indicators of oil and gas wells
Authors: Minnivaleev T N , Kuleshova L S , Arslanov I G , Gizzatullina A A , Minnivaleev A N 
Published: June 2022

Abstract
When drilling oil and gas wells, downhole and drilling wellhead equipment is subject to the influence of significant vibration processes of different directions with different amplitude-frequency characteristics. The paper describes the main sources of vibration of drilling equipment, which have a downhole origin. In this paper an amplitude-frequency characteristic of oscillatory processes of a drill string and their influence on drilling performance are given. In addition to the sources of fluctuations of the bottomhole nature of origin, sources of the wellhead nature can also be distinguished. Thus drilling mud pump is a generator of pulsations and beats of the pressure of drilling fluid, which in turn leads to the increase in the dynamics of the drilling tool, the appearance of torsional vibrations of downhole motors and bits. We established the negative influence of vibrations of the bottomhole assembly and drilling mud on the stability of the operation of hydraulic downhole motors, penetration on the bit, durability of the elements of the string and energy indicators of drilling. The proposed device allows reducing the amplitude of pressure fluctuations of the drilling fluid and drilling tool.
Identification of parameters of induction motor with error of speed sensor
Authors: Ivanov D V , Sandler I L , Mitroshin D I , Terekhin M A , Antonova V V 
Published: June 2022

Abstract
This paper proposes a new approach to parametric identification of induction motor with error of speed sensor. The ordinary least squares (OLS) estimates are shown to be biased. Generalized total least squares (GTLS) with a singular covariance matrix of the error are propose for estimation of K parameters of induction motor. Identification of parameters takes place in 2 steps. At the first step, two K parameters are estimated using GTLS with a singular error matrix. At the second step, the remaining three K parameters are estimated. An equivalent augmented system is used to solve a biased normal system. Based on the simulation results, a comparison of the accuracy of the estimates of the proposed algorithm and ordinary least squares estimates is given.
Development of an electrical energy device for technological machines
Authors: Plieva M T , Gavrina O A , Ignatev I V , Bryanskikh T B 
Published: June 2022

Abstract
The article presents the results of a comprehensive analysis and development of an electric power metering device on device for technological machines on the basis of a comprehensive heat and power survey. The result of the research showed that it is advisable to use electronic electric energy meters to account for electric energy on excavators and drilling rigs, which provide a smaller error compared to induction ones. To account for electrical energy on excavators and burst machines, it is advisable to use electronic meters of electrical energy, which provide a lower error in comparison with induction meters.
Comparative analysis of the speed of concurrent algorithms in solving the forward kinematics of a hexapod robot
Authors: Malyshev D , Pisarenko A , Tereshchenko A 
Published: June 2022

Abstract
The paper discusses the use of parallel computing on a central processing unit (CPU) to solve the forward kinematics of a parallel hexapod robot. The paper proposes two algorithms to solve the forward kinematics. The first is based on the direct use of the system of equations of kinematic relations of the mechanism. The approximation of a set of system solutions represents a problem of a nine-dimensional grade. The second approach is based on the approximation of a set of solutions to the system of inequalities of a three-dimensional grade. A software package for implementing the proposed algorithms was developed. The comparative analysis of the effect of parallel computing on the speed of the presented algorithms was carried out.
The impact of the passage of long-distance trains on the required electrical capacity of the transport infrastructure facilities of the Eastern polygon of Railways
Authors: Akhmetshin A R , Suslov K V , Olentsevich V A , Gladkikh V A , Karlina A I , Baraboshkin K A 
Published: June 2022

AbstractIncreasing the profitability and profitability of railways can be achieved through a phased study, identifying the most problematic areas and a competent, well-planned and economically sound solution to these problems. To do this, the road management structures of individual departments must constantly analyze and develop design solutions for the development and reconstruction of railway transport. Particular attention in terms of increasing freight turnover should be paid to ensuring the required electrical capacities of all transport infrastructure facilities of the Eastern Railway Range, which is currently the most strategically significant in the Holding. In order to optimize the transport service of the eastern direction, increase the cargo turnover of the Baikal-Amur and Trans-Siberian Railways, first of all, it is necessary to provide the required electric capacities of transport infrastructure facilities. It is possible to achieve efficient and reliable power supply for the railways of the Eastern Range, to exclude the possibility of non-export of all categories of cargo, provided that a coordinated integrated approach to the development of the power grid sector of Siberia and the Far East is developed. Such an approach should provide for a phased strengthening of the power system of facilities.
Using new grouting materials during repair and insulation works
Authors: Kadyrov R R , Mukhametshin V V , Kuleshova L S , Mingulov I Sh 
Published: June 2022

Abstract
The paper presents the results of using new materials during repair and insulation works (RIW) in the conditions of Tataria fields and assesses the possibility of their application for the fields of other regions. The proposed new RIW technologies enable to increase oil recovery, reduce the water cut of the manufactured products, and intensify the oil production process. The article discusses the use of vinyl polymer VITAM and organosilicon compounds.
Polymer materials used to reduce waterjet wear of pump parts
Authors: Mamazhonov M , Shakirov B , Matyakubov B , Makhmudov A 
Published: June 2022

Abstract
The article presents the results of studies of the degree of influence of the operating mode of the centrifugal pump on the intensity of the water jet at constant values of the sediment concentration P = 20 kg/ m3, particle diameter d = 0.25…0.5 mm, test duration T = 2 hours and shaft speed n0 = 2900 rpm. Experiments were carried out on pump feeds from 0.5 Qopt to 1.25 Qopt with various materials and polymer coatings that were applied to the surfaces of the blades made of St.3. The best adhesion of the polymer coating is obtained at a metal temperature of 21°C. Polymer materials based on epoxy resin with silicon carbide have the highest wear resistance, while silumin shows low wear resistance. When testing ground pumps, it was found that parts made of electro corundum on an epoxy-phenol-formaldehyde bond, in comparison with parts made of wear-resistant cast iron, increases the service life of pumps 3 - 8 times.
Magnetization of alloys of (Tb1−xYx)0.8Sm0.2Fe2 system in stationary and pulsed magnetic fields
Authors: Umkhaeva Z S , Ilyushin A S , Aleroeva T A , Tereshina I S , Pankratov N Yu 
Published: June 2022

Abstract
The paper presents the results of studying the alloy magnetization of the multicomponent system (Tb1−xYx)0.8Sm0.2Fe2. The substitution parameter in this system takes the following values: x = 0, 0.2, 0.4, 0.6, 0.8, 1. In the system, the atoms of magnetic terbium were replaced by atoms of weakly magnetic samarium and nonmagnetic yttrium. X-ray diffraction analysis determined the structure and lattice constant for all compositions. Phase analysis was carried out. It is known that by varying the concentration of components, temperature, and external fields, one can successfully influence the magnitude of exchange interactions leading to one or another type of magnetic ordering in the rare-earth intermetallic metals. Therefore, the main goal in this work was to investigate the possibility of observing the magnetic phase transition – ferrimagnetism – ferromagnetism - in the alloys of the system from the curves of the field dependence of magnetization in strong fields up to 60 T. The studies were carried out at the liquid helium boiling point. The main magnetic characteristics of the alloys of this system were determined, such as saturation magnetization σs, magnetic moment per formula unit μ and magnetic moment μFe on iron atoms. Their dependences on the concentration of yttrium were established. The possible values of the magnetic moment per formula unit in the case of ferromagnetic ordering of these alloys were calculated theoretically. It was concluded that these fields are insufficient to observe the ferrimagnetism – ferromagnetism phase transition.
Analytical calculation of the coefficient of increasing the moment of resistance to milling the ground when the cutter hits the stump
Authors: Yablonev A L , Misnikov O S , Zhukov N M 
Published: June 2022

Abstract
One of the main operations in peat soil processing is milling. The entire subsequent production process depends on the quality of the milling. The presence of wood inclusions in the soil greatly complicates the work. The sharply increased moment of loading that occurs when the cutter hits the stump is capable of removing both the transmission elements and the drive of the milling unit from the operational state. Therefore, at the design stage, it is necessary to take into account the dynamic loads arising from the meeting of the cutter with wood inclusions. Attempts to describe this fact were made earlier by various authors, but due to mathematical and methodological errors, they were not crowned with success. In this article, an attempt was made to "work on errors", which allowed one, taking into account all the previous errors and inaccuracies, to achieve the desired result.
Main patterns of stress corrosion forming the basis for control, evaluation and deceleration methods
Authors: Khasanova A R 
Published: June 2022

Abstract
The most effective methods of control during incubation of development and cracking were systematized and proposed on the basis of the developed physical model of corrosion cracking of main gas pipelines under stress. It was established that this is one of the most advanced methods for testing gas pipelines for stress corrosion cracking – this is a magnetic location method.
Experimental seeders for sowing unseeded seeds
Authors: Farmonov E T , Arifjanov A M , Farmonova F E 
Published: June 2022

Abstract
Information on the use of seeders for sowing seeds of agricultural crops and their converted experimental seeders for sowing unseeded seeds is given in this article. It has been shown that such sowing units do not fully meet the agro technical requirements for sowing unseeded seeds. Most of the research focused on the issues of unloading seeds from the bunker, but did not study the laws of their movement inside the bunker. The authors have proposed a separate two-section hopper for the seeding row of the seeder when sowing unseeded seeds of fodder plants in deserts. Inside the two-section hopper of the proposed seeder, mathematical expressions are set that make it possible to determine the regularity of the movement of unseeded seeds and the time of their fall.
Screw conveyor with anti-friction polymer coating for cotton transportation
Authors: Irgashev A A , Ergashev F A 
Published: June 2022

Abstract
Screw conveyors used in the ginning industry when interacting with raw cotton, significantly damage it and reduce the quality of the products. The article presents the results of a study of the effect of antifriction polycaproamide composite coating applied to the surface of the screw and the chute on the quality of cotton fiber and seeds, as well as on the productivity and power consumption of the screw conveyor for cotton. During the production tests, measurements are made of the magnitude of the linear wear of the coating on the surface of the screw and chute. It is established that with the recommended thickness of the coating of APCC-I 600–700 microns, its durability under operating conditions at the cotton gin plant, with two-shift operation during one season, will be fully ensured.
An analysis of reliability of electric submersible centrifugal pumps
Authors: Khabibullin M Ya , Suleimanov R I 
Published: June 2022

Abstract
The average operating time before structural and technological failures of the submersible part of a typical ESP is 64.5–81.9% of the average operating time of new ESPs. Given that the set of typical ESPs includes a significant share of repaired and mixed (equipped with new and refurbished units) installations, this fact can be interpreted as evidence of poor quality of repair. The data obtained from Tatneft and Bashneft companies agree with this conclusion. The data provided by Nizhnevartovskneftegaz company do not contradict this conclusion. The high values of Ttkt obtained by Rosneft-Samaraneftegaz are a consequence of poor identification of the causes of ESP lifting during control operations, as a result of which some failures are treated as design and technological ones.
Estimation of parameters and operating modes of the screw cutting device
Authors: Alijanov D , Jumatov Y 
Published: June 2022

Abstract
The research is directed from the theoretical aspect to the development of the design of a new grinder, characterized by low energy and metal consumption. The work investigates the relationship of geometric parameters and speed modes of operation with quantitative and qualitative indicators of the screw cutter system. It is possible to increase the degree of chopping of the stems only by reducing the average cut length, i.e. by increasing the rotational speed screw knife. The experiments shows the average slice lengths and the corresponding productivity of the screw cutting pair depending on the speed of rotation of the knife. That for compliance with zootechnical requirements, modes n= 550-650 rpm.( lav = 8-4,5 sm ) - with vertical loading, and n=400-450rpm (lav = 5,5-4 sm) – at inclined feed at an angle β = 450. An increase in the frequency of rotation of the knife leads to a sharp decrease in the productivity of the cutting pair. The above numerical examples are selected in accordance with the parameters of the experimental setup and show good agreement with the experimental results.
Diagnostics of power transformers operating for many years in the power supply system through gases in the composition of transformer oil
Authors: Denmukhammadiev A M , Yusupov D T , Shoyusupov Sh A , Djalilov A U , Nazarov O A 
Published: June 2022

Abstract
Oiled power transformers and autotransformers 40-60 years ago are still in operation in Uzbekistan. At the same time, diagnostic methods for determining faults in transformers and autotransformers remained the same. This article partially analyzes the factors affecting the oils of power transformers and autotransformers used in the agricultural sector. It is known that transformer oil performs the functions of cooling and insulation. During use, the oil is in direct contact with air through the respiratory system. There is a process of transition of moisture and various gases in the composition of the air into the composition of the oil. By the composition of gases, it is possible to determine the reasons for the deterioration in the quality of the main and additional insulation of oil-immersed power transformers. The issues of influence on the state of insulation of marsh gases appearing inside (at the bottom) of the tank of oil transformers and partial discharges in oil-gas medium have been little studied.
Analysis of theoretical cycle of thermal engines and improvement of diesel mixing process
Authors: Khakimov B B , Rajabov N Q , Xaydarov T A , Kalandarova S T , Kulmamatov O A , Khudoyorov O , Murodov T 
Published: June 2022

Abstract
This article provides a theoretical analysis of the diesel cycle, the device and principle of operation of the proposed atomizer with a replaceable mesh turbulator. This ensures the formation of a homogeneous fuel mixture in the vortex chamber and the completeness of its combustion without toxic emissions. The importance of the scientific work provides for the need to improve the toxicity of the exhaust gases of thermal diesel engines and their fuel efficiency.
The methodological specificity of measuring surface tension by the methods of large drop and maximum pressure in a drop
Authors: Dadashev R Kh , Kutuev R A , Sozaev V A 
Published: June 2022

Abstract
A comparative analysis of the experimental data on the surface tension (ST) of low- melting metals, obtained by the method of maximum pressure in a drop and the method of a large drop, shows that the values of ST obtained by the large drop method for all studied metals are noticeably higher than those obtained by the method of maximum pressure in a drop. The reasons for such discrepancies, although in some cases they exceed the total errors of the ST measurement by the indicated methods, have not yet been clarified. In this regard, the paper gives a comparative analysis of the methodological specificity of measuring the surface tension by the methods of maximum pressure in a gas bubble or a drop and a lying or “large” drop. It is shown that these methods are theoretically substantiated, technically perfect, have a sufficiently high accuracy and are relatively simple. Based on the identification and critical analysis of the influence of the main factors on the measured value of the surface tension, the main reasons for the discrepancy between the experimental data on the surface tension of low-melting metals obtained by different methods are determined. It is shown that the underestimated ST values obtained by the method of maximum pressure in a droplet are due to the fact that all factors influencing the measured value of surface tension are directed towards a decrease in its value. Although the influence of each of these factors separately is insignificant, they together lead to a noticeable decrease in the value of surface tension. It is shown in the work that the method of maximum pressure in a drop, being the most accurate method for measuring ST, gives somewhat underestimated ST values for all low-melting metals.
Longitudinal vibrations of underground pipelines of finite length with account for the node weight on the ends
Authors: Shadmanova G , Karimova K , Khusainov R , Khusainov S 
Published: June 2022

Abstract
The paper presents an analysis of the dynamic response of an underground main pipe under the action of longitudinal wave, propagating in soil along the pipe. The outer surface of the pipeline is in contact with soil along the pipeline axis according to the elastic- viscous law, and the ends of the pipeline are connected to massive nodes by elastic elements. Using the Fourier method, an analytical solution to the problem of longitudinal vibration of an underground pipeline, pliantly fixed by nodes at its ends, is obtained. The problem of longitudinal vibration of an underground pipeline with visco-elastically fixed nodes at the ends is solved numerically. Longitudinal wave in soil is taken as a traveling sine wave. The paper presents a comparative analysis of the results for some values of seismic wavelengths, the ratio of the wave propagation velocity in soil and in the pipeline, the coefficients of elastic and viscous interaction. The viscosity coefficient of interaction at the "pipe-soil" system contact leads to attenuation of the wave front in the underground pipeline. For soils, the values of the viscous interaction coefficient of more than 100 kN⋅s/m2, may lead to complete attenuation of the bursts at the wave front in the pipeline.
Development of hardware and a system for analyzing energy parameters based on simulation in SimInTech
Authors: Shchemeleva Y B , Sokolov A A , Labazanova S H 
Published: June 2022

Abstract
The work is devoted to the issue of improving the efficiency of information systems in the field of energy, in particular, specialized systems in the field of data analysis and processing, designed for operational processing of information with its subsequent visualization, analysis and decision-making on the management of energy parameters of technological equipment, based on the developed ranking block information on monitored electrical power parameters using SimInTech software.
Mathematical modeling in the organization of the production process of leaching metals
Authors: Kondratyev Yu I , Sokolova O A , Arhipov P V 
Published: June 2022

Abstract
The following will describe the process of how you can use mathematical modeling to organize the production of metal leaching. Mathematical models and results of computational experiments are presented. The results of studying the thickness of films of sulfuric acid-chloride solutions containing the addition of surfactants surface-active substance (SAS), which are formed when they pour out onto a frosted glass surface as a model of the surface of a piece of ore, are presented. A mathematical model how the film thickness changes depending on the feed rate of the solution and its composition, as well as on the angle of inclination of the glass surface has been determined. Underground leaching of metals from ores stimulates the search for ways and means of intensifying the process. Due to the addition of a surfactant, the leaching process is accelerated, since the thickness of the films of leaching solutions flowing over the surface of ore minerals decreases. This direction is relevant in modern science, and research in this direction the growth of indicators allows the national economy to improve and helps to improve and increase knowledge for further development of the metallurgical industry in Russia The article also discusses the results of studies on the electrochemical leaching of metals from polymetallic ore by sulfuric acid-chloride solutions with the addition of a surfactant with asymmetric current pulses. Mathematical models of the dependence of leaching indicators on the density and duration of the flow of direct and reverse polarity are presented. For ease of perception and better visualization, a table was compiled, which reflects the results of comparative analysis to assess the further possibility of processing secondary raw materials.
Indicators of the effectiveness of the use of automation systems (SA) to support infocommunications services
Authors: Khasambiev I V , Vlasova O V 
Published: June 2022

Abstract
Administration of communication networks, according to the Law “On Communication”, is a set of organizational and technical measures aimed at ensuring the trouble-free and coordinated functioning of the communication network. Including traffic regulation, monitoring and control of the state of network elements, transport network channels and interactions of nodes, as well as managing the operation of applications and the provision of new infocommunication services. In this regard, this work is devoted to the study of the topic Indicators of the effectiveness of the use of automation systems to support infocommunications services