This study investigates the applicability of pultruded glass fiber–reinforced polymer composites for structural components in oilfield infrastructure, focusing on their performance under aggressive environmental conditions. The introduction highlights the challenges of corrosion and logistics in traditional steel-based oilfield structures, proposing polymer composites as a viable alternative due to their low weight and high resistance to environmental degradation. The research objectives included evaluating the composites’ resistance to chemical exposure, freeze–thaw cycles, and climatic aging. Experimental methods involved testing density, water absorption, tensile strength, and modulus of elasticity under simulated oilfield conditions, including immersion in 1 wt% NaOH and 10 wt% HCl, frost resistance tests in 5 wt% NaCl, and cyclic temperature–humidity exposure. Results showed that the composites maintained ≥90% tensile strength, ≥85% flexural modulus, and water absorption ≤0.5% after 240 hours of exposure, with no significant degradation observed. Statistical modeling identified serviceability thresholds for specific environmental parameters. The study concludes that pultruded polymer composites are feasible for oilfield infrastructure, offering comparable mechanical performance to steel with reduced operational costs.

Keywords: pultrusion, glass fiber composite, polymer composite, oilfield infrastructure, environmental degradation, mechanical property, chemical immersion, freeze–thaw cycling, climatic aging

Results of the Serial Peripheral Interface (SPI) Slave node design based on gate arrays 5503 series are presented in this paper. SPI is used for high-speed synchronous data transmission between control and peripheral devices. Developed chip could be applied in connection with SPI Master node for matching microcontrollers and microprocessors with different sensors, analog-to-digital and digital-to-analog converters, memory and communication units. Upon the results of the development, design approach of digital integrated circuits is proposed. The approach supposes using Russian freeware CAD "Kovcheg" ("Ark") designated for gate arrays design (IC based on prefabricated crystals, components on which are supposed to be interconnected during design to form logic devices). According to the proposed approach, behavioural descriptions of the devices, written on hardware description languages (e.g. Verilog), are used, since it is often easier to describe circuit operational principal algorithmically than construct structure from components library. The problem is that "Kovcheg" can't execute structural synthesis of the circuit from behavioural description. So it is proposed in the approach to use outside CAD environments, intended even for design of custom full-integrated circuits (like Cadence) or FPGA (like Vivado), to synthesize structural description of desired device from known behavioural ones and available process design kits (PDK) or library, appropriate for the chosen CAD. The entire design cycle using "Kovcheg" is outlined in the paper.

Keywords: gate arrays, serial peripheral interface, hardware description language, computer-aided design

The article discusses the features of the use and applicability of identification of parameters of the equivalent circuit of an submersible electric motors. The possibilities of technical implementation with a given accuracy are evaluated for definition the parameters of submersible electric motors substitution circuits under various external influences, as well as when designing submersible electric motors as an integral part of the electro-technical complex of electrical submersible pump units.

Keywords: submersible electric motor, electrical submersible pump unit, identification of parameters of the equivalent circuit of an asynchronous electric machine, mathematic simulation, crude oil production

The paper considers the characteristics of cloud convection obtained in the course of computational experiments on the basis of a three-dimensional physical and mathematical model of convective clouds, which takes into account in detail the microphysical processes of nucleation, condensation or sublimation of water vapor, coagulation and accretion of precipitation particles, accumulation of volume electric charges, and an increase in the electric field strength. clouds due to charge separation processes occurring during the rapid freezing of large supercooled drops, accretionary growth of cereals and hailstones. Based on the data of numerical modeling using the noted model, the location in the volume of the microstructural parameters of thunderstorm clouds (water content and ice content), space charges, electric field strength, radar reflectivity in the centimeter range, and other parameters at fixed times of cloud evolution was investigated.

Keywords: convective cloud, cloud microstructure, cloud electricity, numerical three-dimensional model, radar reflectance, electrical coagulation

The paper presents the characteristics of wind and solar resources of the Southern Federal District on the basis of which the assessment of the prospects for introducing innovative innovations such as perovskite photovoltaic cells and Vertical-axis wind turbines into the process of district energy production is given.

Keywords: Vertical-axis wind turbines, alternative energy source, wind power, wind turbine, renewable energy source, perovskite photocell, solar battery, solar energy, energy resources of the Southern Federal District, energy saving

The paper presents the characteristics of the leading types of media facade constructions on the market, on the basis of the analysis of which the prospects for the introduction of technology into the urban space were evaluated. The article also describes the main types structural and architectural solutions that determine the rationality of the use of a particular type of media facade.

Keywords: media facade, cluster media facade, framed media facade, frameless media facade, modular media facade, LED, architectural lighting, LED screen, media facade design, interactive facade

The article deals with the problems of using structural systems with outriggers for high-rise buildings. The analysis of various designs is carried out, the features of their work are specified, the advantages and disadvantages are identified, the areas of their application.

Keywords: high-rise building, structural system, outrigger, skyscraper, column, core of rigidity, strength, reliability, horizontal load, aerodynamics