bluuebunny/crossref_metadata_2025_split huggingface dataset:
Improvement of formation fluid separation efficiency
Authors: Khabibullin M Ya 
Published: November 2020

Abstract
Producers and researchers pay attention to the improvement of high-quality and productive separation of liquid heterogeneous systems in the oil and gas industry. To perform these operations, various designs of sedimentation tanks, separators, hydrocyclones, etc. based on gravitational and centrifugal separation of inhomogeneous masses of various densities are used. A further noticeable increase in the diameter of the rotor, for example, up to 1500 mm, is associated with the search for new design forms of separators. This is due to serious design studies and restructuring of the production base.
Improvement of the efficiency of horizontal wells
Authors: Kozikhin R A , Fattakhov I G , Kuleshova L S , Andreev V E , Safiullina A R , Gabbasov A Kh , Andaryanov I G 
Published: November 2020

Abstract
The research purpose is to identify factors of premature flooding of wells, assess the influence of factors, simulate and compare results obtained with field data. An analysis of the reservoir properties, design and development indicators of horizontal wells showed that only 41% of cases of premature flooding are due to geological causes (heterogeneity of rock permeability). Technological reasons (high specific samplings) occur in 36% of cases, this problem is pronounced in wells where new technologies were implemented – division of the wellbore into sections using water and oil swell packers. In 23% of cases, premature flooding is due to wellbore drilling in the water-saturated zone.
The effect of axial loading on drill string deformation
Authors: Kuleshova L S , Akhmetshina D I , Fatkullin A A , Abdulmanov A A 
Published: November 2020

Abstract
A practical method for calculating the axial load of a string through the load on a hook is presented and the flotation capacity of elements for different well trajectories is provided. It was found that the traditional simplified method for calculating the buoyancy factor, which is used to calculate the axial load on a string and axial tension, can only be used in vertical wells with a freely suspended pipe string, since in this state buoyancy acts only on the lower part of the string. If the string is constrained by downhole tools such as a packer or an anchor, buoyancy cannot be considered a simple weight loss. In directional wells, buoyancy changes the axial load of the string and causes shear stresses in the cross section of the string. When calculating the effect of fluid on the string, it is necessary to take into account the sequence of operations and stresses from wellhead and downhole tools.
Technological features of pumping water into high-viscosity oil injection wells with the bottom hole pump
Authors: Mingulov Sh G , Mingulov I Sh , Mukhametshin V V 
Published: November 2020

Abstract
The authors laid bare a correlation between the proportion of mechanical contaminations and oil products in discharge waters and the average oil viscosity in the field. Film thickness depends on the oil viscosity. More viscous oil forms thicker and heavier films on the surface of suspended solids. The use of electrical centrifugal pumps for fossil water injection into the well allows using the heat produced by the pump to warm the water. Standard measurement instruments show that the change of injected water temperature at the head of the well pump-over unit is between 1.1 and 8.4 °C. The average temperature increase is 3.6 °C.
On the influence of the amount and viscosity of oil on the content of solid particles in the water injected into the reservoir
Authors: Mingulov Sh G , Mingulov I Sh 
Published: November 2020

Abstract
Based on the studies carried out, a statistical dependence is obtained for calculating the amount of oil carried over by the discharged water from the viscosity of the extracted oil and the daily loading of the apparatus by liquid, and also a statistical relationship is established between the content of oil and mechanical impurities in the discharged water and the dependence of this ratio from the viscosity of oil.
Dynamics control of a drilling tool by installing a downhole hydromechanical compensator of pressure fluctuations of drilling fluid into the bottom hole assembly
Authors: Minnivaleev T N , Arslanov I G , Kuleshova L S , Minnivaleev A N 
Published: November 2020

Abstract
The fluctuation processes of the drilling tool and the pressure of the drilling fluid resulted from numerous factors of both downhole and wellhead nature lead to many negative consequences. The article describes the impact of non-uniformity of the pressure of the drilling fluid on the drilling process, provides an analytical study of the developed downhole hydromechanical compensator of pressure fluctuations of the drilling fluid installed into the bottom hole assembly. The authors obtained an analytical dependence of the degree of decrease in the amplitude of the pressure fluctuations of the drilling fluid in the compensator on the number of damping stages installed in it. The article describes the results of pilot tests of the compensator, indicating the reliability of the theoretical provisions and the high efficiency of the compensator.
The results of applying the method of mathematical statistics to predict technological effectiveness of hydraulic fracturing
Authors: Shakurova Al F , Shakurova Ay F 
Published: November 2020

Abstract
The article discusses the apparatus of mathematical statistics for predicting the technological effectiveness of hydraulic fracturing. The authors made an attempt to improve the methods for processing experimental data in the conditions of a small sampling. The main method used for solving this problem was the second-order regression equation in the form of a polynomial. The comparison of calculated and actual data on technological results for hydraulic fracturing based on the solution of second-order polynomial regression equations for different fields showed a high level of convergence, which allows us to conclude that the proposed methodology for constructing a regression equation in the form of a power polynomial is acceptable.
Well bottomhole cleaning device
Authors: Zaripova L M , Gabdrakhimov M S 
Published: November 2020

Abstract
Deterioration of bottomhole formation zone permeability is caused by mechanical pollution of porous medium, swelling of cement at its contact with water and accumulation of paraffin in low formation temperature deposits. In the process of oil production all extracted formation fluid: oil, water and gas pass through bottomhole zones of production wells and all water injected into formations – through the wellbore zone of injection wells. These processes occur at temperatures and pressures other than those at which these fluids (or gases) were originally on the surface or in the formation. As a result, different hydrocarbon components (asphalt-resin deposits) and different salts that fall out of the solutions as a result of thermodynamic equilibrium disorder can deposit in the wellbore zone, as in the filter. The choice of the impact method is based on the careful study of thermodynamic conditions and state of the wellbore zone, composition of rocks and fluids, as well as systematic study of accumulated production experience in this field.
Improved rotary union in top-drive hydraulic power packs used on drilling rigs
Authors: Suleimanov R I , Khabibullin M Ya 
Published: November 2020

Abstract
The paper is concerned with a top-drive hydraulic power pack used on a drilling rig. The efficiency of hydraulic power packs can be ensured through a rotary union in a hose reel. An effective circulation of working fluid in the hose reel requires an improved rotary union, which allows the flow of working fluid to be redistributed with minimal energy and additional costs. As a result, the lifetime of the system is increased and the downtime of the rig is reduced.
Degree and nature of shaft misalignments in pumping units assessed against vibration criteria
Authors: Suleymanov R N , Filimonov O V 
Published: November 2020

Abstract
The paper shows that the degree and type of shaft misalignments, along with imbalances, have a decisive impact on vibration levels in centrifugal pumps. An accurate assessment is impossible without a unit shutdown to measure shaft alignments with special devices. A method for determining misalignments is proposed to assess the degree of misalignment against vibration spectra, the so-called rotational harmonics.
Improving the material properties of vacuum devices electrodes by technology rational improvement
Authors: Kyrganova Yu , Nikolukin Yu , Panina K 
Published: November 2020

Abstract
The material of the electrodes of high-current vacuum and plasma electronics is traditionally obtained by powder metallurgy methods (mixing components, pressing blanks, hydrogen sintering in a given mode). However, the material of the cathodes produced according to the adopted technology, has a number of significant limitations. They are caused by the impossibility of a uniform distribution and grinding of the initial powder components by the adopted grinding in globe mills, as well as by abundant gas emission during the sintering time. The nonuniformity of the distribution of the composition in the structure, low density, high porosity, low mechanical strength of the emitting material with a metal matrix give a decrease in the operating properties of the cathodes, which leads to a decrease in the lifetime of electronic tubes. This problem is proposed to be solved by directional changes in the physical and mechanical properties of the electrode material by selecting the gravimetric consist of the base material components and improving the existing production process. The article presents the analysis of research results, changes in the structure of the material by optical and scanning microscopy methods, and also describes a complex of acquired physical and mechanical properties of experimental samples obtained by modernized technology. Thus, the developed innovative techniques allowed to increase the hardness by 36%; density by 19%, and to reduce porosity by 25% in relation to traditional cathodes. Such changes in the physical and mechanical properties make it possible to predict an increase in the service life of produced and developed vacuum tubes operating in current flow regimes up to 100 kA and in highly stressed electromagnetic fields up to 500 kV.
Technological bases for increasing the durability of aviation parts by chemical heat treatment
Authors: Pakhomova S , Karpukhin S 
Published: November 2020

Abstract
The paper presents studies of the structure and properties of low-carbon alloy steels after carburizing. A comparison of four types of carburizing (batch carburization, conveyor carburization, fluidized bed carburization and ionic carburization) is made. The influence of technological modes of chemical-thermal treatment on the phase composition and amount of carbide phase in a carburized layer is considered. It is shown that the type of carburizing affects the operational properties of parts of aircraft mechanisms. The best results were shown by the details after ion vacuum carburizing. The increase in wear resistance and contact fatigue is associated with the formation of a high-quality surface layer having a higher hardness and a higher proportion of the carbide phase. Such properties cannot be obtained after conventional types of carburizing in a shaft or conveyor furnace. In this case, ionic carburizing and carburizing in a fluidized bed make it possible to halve the technological regime of carburizing in comparison with two other methods.
Improving wear resistance of drill pipe sub thread by using final electromechanical surface hardening
Authors: Fedorov S , Zaripov V , Ivanova Y , Yakovleva A 
Published: November 2020

Abstract
Improving wear resistance of drill pipe sub thread is a vital task, and finding effective solution for it would much assist oil and gas companies to enhance well construction process. The report presents the results of comparative wear resistance tests for P147/147 and P133/133 subs of the top drive manufactured by OOO «NIGMASH» in Bashkortostan. The tests were performed by OOO «Tatburneft» holding company, a division of PAO «TATNEFT». Both, series and test subs were made from 40X2H4A steel. This report shows the results of metallographic studies and tests for improvement of the parts wear resistance, including the method of final electromechanical hardening (EMH) of the box and pin threads as compared with the conventional method of bulk heat treatment.The researches has developed the equipment, tools and technology for hardening of tool joint thread of drill pipe subs. The performed tests and studies aimed at enhancing efficiency of oil and gas well drilling. Their results are of much interest for oilfield operators, drilling and service contractors, as well as drilling subs manufacturers and repair companies.
A multi-body dynamic model of the snowmobile to define acting loads in the its parts
Authors: Vdovin D , Levenkov Y , Chichekin I , Fominykh A 
Published: November 2020

Abstract
In this paper, the snowmobile multi-body dynamic (MBD) model is presented. Mass reduction of the snowmobile parts is the important problem in the process of creating a new vehicle. It is important to determine loads to create rational designs of parts. There are various modeling methods for determining loads. More convenient method is using the MBD model. Research objective: development of the snowmobile MBD model, taking into account the main features of its design. It is possible to perform optimization and strength calculations of snowmobile parts using defined loads at early stages of the development.
Application of optimization methods to reduce the mass of body parts of minibuses made of layered composite materials
Authors: Kostenko A , Zuzov V 
Published: November 2020

Abstract
Annotation. This article proposes an approach to reducing the mass of parts from layered composite materials, including parametric and topological optimization of parts using the finite element method. The proposed approach made it possible to shape the body for a minibus with the least amount of time, which confirms its effectiveness.
To the concept of improving the quality of technology for the arctic zone of the russian federation
Authors: Kushnarev L , Kushnarev S 
Published: November 2020

Abstract
The restoration and development of the technological potential of machine-building enterprises to the modern technical level with the existing approaches requires not only significant investment, but also a robust strategy of actions to achieve the targets, the main of which is a comprehensive increase in the quality of manufacturing and increase in the production volume of machine-building products. Only a quick and steady increase in the quality of machinery and equipment, at least to the level of the best world analogues, will ensure the steady and intensive development of the entire machine-technological complex of the country. This is especially true for improving the quality of equipment designed for use in harsh arctic conditions.

Materials and methods. The current level of domestic equipment quality differs significantly from foreign counterparts. The results of organizational and technological studies indicate the need to improve existing forms and methods of organizing production and maintenance by machine manufacturers throughout the entire life cycle.
Monographic research, analysis and synthesis, abstract and logical, technical and economic assessments are used as scientific research methods.

Research results. The goal is solving the problem of improving the quality of domestic technology. The proposed organizational and technological solutions provide an accelerated output of mechanical engineering in terms of product quality and production volumes in accordance with the requirements of technological modernization of the country’s economy.

Discussion and conclusion. To achieve the required level of quality of technological machines and equipment, authors propose to improve the quality of manufacturing and reliability indicators of machines and equipment. The solution to this problem is the reorganization of the existing production and technological system and the introduction of proprietary engineering and technical service (maintenance) of equipment throughout the entire life cycle.
Experience in calculating the annular discharge of a centrifugal pump based on the hydrodynamic modeling method
Authors: Martynyuk O , Petrov A 
Published: November 2020

Abstract
Abstact. The problems of small-sized centrifugal pumps for thermal stabilization systems and the need to optimize them in order to increase efficiency, wear resistance and service life are considered. The types of outlets used in such pumps and their advantages are defined. Using hydrodynamic modeling in the STAR CCM+ software package, the values of efficiency and radial force on the impeller rotor at different feed rates for centrifugal pumps with annular and spiral discharge are obtained. The data obtained were analyzed and processed, as well as compared with the results of similar studies in previous years. The advantages and disadvantages of each outlet are determined and the conclusion is made.
Hardware-in-the-loop modeling applied to FESTO hydraulic learning system
Authors: Kulakov B , Kulakov D 
Published: November 2020

Abstract
The issue of Hardware-in-the-loop modeling in Matlab/Simulink using a physical model of an electrohydraulic servo drive implemented on FESTO learning system is considered. As an example, the synthesis of state components feedback coefficients for the electrohydraulic servo drive control is discussed. The paper provides the block-diagrams for connecting FESTO physical model to Matlab software and algorithms that allow using Matlab for automatic optimization of the controller parameters directly during the operation of the electrohydraulic servo drive physical model. Thus, already at the stage of optimizing the parameters of the controller, its operation as part of a real hydraulic system is studied.
Method for increasing the damping of an electro-hydraulic drive system of anthropomorphic walking robots
Authors: Semenov S , Ryabinin M 
Published: November 2020

Abstract
Annotation. Due to the fact that anthropomorphic walking robots (AWR) are becoming one of the classes of extreme robotics tools, the task of creating drive systems that simultaneously have high indicators for a set of parameters arises. In particular, the problem arises of preventing the occurrence of self-oscillations in conditions where servo drives with high quality factor experience strong dynamic mutual influence through the actuator. According to the totality of indicators for AWR designed for operation in extreme conditions, electro-hydraulic servo drives are preferable. Features of the dynamics of the ASH actuators and the electro-hydraulic drives used on them force us to look for new ways to correct their dynamic properties. This article presents a method of reducing the propensity of a drive system to generate self-oscillations by correcting hydraulic drives using acceleration feedbacks. It uses an estimate of the relative accelerations of the robot links during movement using the signals from pressure sensors installed in the actuator hydraulic motor. The calculations are made using the equations of dynamics of the AWR actuator, taking into account the temporarily imposed external connections. The method allowed to significantly increase the dynamic accuracy of the drive system of the prototype AWR developed by MSTU N.E. Bauman.
Study of tribotechnical characteristics of 3D printed abs plastic samples
Authors: Slavkina V , Lopatina Yu 
Published: November 2020

Abstract
This work is devoted to research of tribotechnical characteristics of 3D printed samples from ABS plastic. The results of determination of friction coefficient and depth of counterbody introduction into the sample surface on Tribometer TRB-S-DE-0000 are presented. The article also presents the advantages of using 3D printing for repairing machine parts and describes the causes of gear failure.
Propeller optimization for underwater propulsion
Authors: Cheremushkin V , Polaykov A 
Published: November 2020

Abstract
Annotation. This article is devoted to the optimization of an underwater propulsion propeller and the identification of the main dependencies in the first stages of optimization. A mathematical model and a parameterized 3d model with indication of variable parameters, as well as optimization criteria, are presented. The used method of numerical hydrodynamic modeling is described. The obtained characteristic dependencies are presented in the form of graphs.
Microstructure and Mechanical Properties of the Wire Arc Additively Manufactured Sv-08G2S Steel
Authors: Kulikov A A , Balanovskiy A E , Grechneva M V 
Published: November 2020

Abstract
Wire arc additive manufacturing enables using almost any grade of metal for the additive production of parts with complex shapes and large sizes. As an increasingly growing number of materials are being used for WAAM, it is necessary to conduct systematic research on the properties of various metals and alloys. This article presents a study of the microstructure and mechanical properties of the wire arc additively manufactured Sv-08G2S steel. Once the wall-shaped sample was deposited, it was cooled in the air at room temperature. The sample for microstructure studies was cut across the central line of the deposited layers. In the sample, three sectors were conditionally distinguished: the lower sector, deposited on a cold substrate, has a ferrite structure with inclusions of lamellar perlite; the middle sector has a purely ferritic structure; the upper sector has a bainite structure. The microstructure study was followed by hardness measurements performed in all sectors of the sample. The hardness values confirmed the presence of different structures in all sectors, the hardest of which was the upper sector with a bainite structure. The last stage of the study was the tensile testing of the sample performed on a test breaking machine. The obtained values of the ultimate tensile strength and yield strength of additively deposited steel are within the range and even exceed the characteristics of wrought low-carbon steels. Therefore, the conducted research proved that the additive manufacturing of parts made of Sv-08G2S steel enables achieving the necessary quality and provides the mechanical properties required for structural steels.
X-ray Diffraction Analysis by Williamson-Hall Method of Strontium Hexaferrite Lattice Features after Mechanical Milling
Authors: Egorov I N , Egorova S I , Ya Egorov N 
Published: November 2020

Abstract
The paper presents the result of experimental studies of strontium hexaferrite milling in beater mill. SEM studies showed that milling of strontium hexaferrite in beater mill with formation of magneto fluidized bed leads to significant intensification of the process. Williamson-Hall method was used to determine structural characteristics changes in the strontium hexaferrite powder from milling time in magneto fluidized bed. Carried out studies showed that milling intensification is significant only to a certain dispersity of processed powder. However, during milling with formation of magneto fluidized bed, decrease of particle sizes and structural characteristics changes speed happens at finer disperse compound.