Mechanical drilling of glaciers with bottom-hole scavenging with compressed air by A. V. Bolshunov, D. A. Vasilev, S. A. Ignatiev, A. N. Dmitriev, N. I. Vasilev

“…Petersburg Mining University on the dome of the Academy of Sciences Glacier (the Severnaya Zemlya archipelago) is free of the above disadvantages. To adapt this method to conditions of drilling in Antarctica, it is necessary to carry out a complex of researches, the implementation of which will allow creating a new cable-suspended electromechanical drill for efficient and environmentally friendly drilling of the upper layers of glaciers.…”
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Real-Time Pore Pressure Detection: Indicators and Improved Methods by Jincai Zhang, Shangxian Yin

“…High uncertainties may exist in the predrill pore pressure prediction in new prospects and deepwater subsalt wells; therefore, real-time pore pressure detection is highly needed to reduce drilling risks. The methods for pore pressure detection (the resistivity, sonic, and corrected d-exponent methods) are improved using the depth-dependent normal compaction equations to adapt to the requirements of the real-time monitoring. …”
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Modelling and measurements of thermally induced residual stress in IN718 nickel-based superalloy during non-uniform quenching by S. Rahimi, M. King, M. Amir Siddiq, B.P. Wynne

“…For the verification of the model, identical plates were heterogeneously quenched (half in water and half in air) from 980 °C, both vertically and horizontally, and residual stress was then measured in both plates using the contour method and incremental central hole drilling.…”
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INTERACTION OF A HELICAL BLADE OF A DRILLING TOOL WITH FROZEN GROUND by I. G. Martiuchenko, M. I. Zenin

“…It is established that a helical drilling tool performs a borehole drilling due to the tearing strain implementation, which makes it possible to achieve more efficient drilling and obtain a borehole diameter larger than a diameter of the destroying section of a helical blade.Financial transparency: the authors have no financial interest in the presented materials or methods. …”
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Research progress and thinking on specialized drilling technology in underground coal mine by Jianlin LIU, Fei LIU, Quanxin LI, Jun FANG, Guiqin LIU, Siyi WANG, Zhiwei CHU, Jianguo ZHAO, Weifeng YANG

“…The typical application scenarios of specialized drilling technology are summarized, such as precise gas control in soft-fragmented coal seam, replacing tunnel with borehole for relieved gas drainage in roof, mine water detection and release, and grouting reinforcement of water-resisting layer.It delves into the key technical challenges encountered during implementation.Focusing on drilling equipment upgrade, innovative drilling method, and drilling parameter optimization, the study comprehensively reviews the current development status, critical technological advancements, and practical outcomes.The specialized drilling technology suitable for soft-fragmented coal seam, hard rock strata, and fractured and water sensitive strata are outlined, and the existing technical bottlenecks and challenges are identified.Given the evolving trends of diversified demand, equipment intelligence, and region-specific adaptation in underground specialized drilling technology, future research priorities are proposed: ① To enhance air directional drilling technology for soft-fragmented coal seam to improve formation adaptability and process compatibility. ② To advance high-efficiency drilling acceleration technology and tool for hard rock strata to boost rock-breaking efficiency and service life of impact drilling tool. ③ To overcome theoretical and technical barrier in pressure-controlled drilling under near-horizontal condition to strengthen borehole formation capability in fractured and water-sensitive strata of roof or floor. ④ To accelerate the improvement of the reliability and stability of intelligent drilling technology and equipment in underground coal mine, and promote the realization of the transformation of specialized drilling technology from equipment intelligence to engineering intelligence. ⑤ To research and constructe specialized drilling technology system of regional, mining area and mine, and promote their wide application and in-depth development in the coal mining industry.The study can provide an important reference for the technological innovation and efficiency improvement of drilling process in underground coal mine.…”
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Optimization and Application of Drilling Parameters Based on Gas–Solid Coupling Simulation by Zhiguo Ge, Guochao Yan, Shaoqi Kong, Baodong Zong, Huizhi Liu, Jinjing Huang, Gaochuan Guo

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Efficiency of enhanced oil recovery’s and oil production stimulation’s methods at the oil fields of Khanty-Mansi Autonomous Okrug – Yugra by S. G. Kuzmenkov, M. I. Korolev, M. V. Novikov, A. N. Palyanitsina, O. A. Nanishvili, V. I. Isaev

“…This article aims to analyze the methods of enhanced oil recovery and and oil production stimulation methods (EOR and PS) used at the KhMAO – Yugra fields on an industrial scale, their features and their contribution to additional oil production from 2001 to 2021.The article describes such technologies as sidetracking (STB), physical and chemical methods (FCM), hydraulic fracturing (HF), bottom-hole treatment (BHT), hydrodynamic methods (HDM), horizontal well drilling (SHD), as well as other geological and technical measures (GTM) aimed at optimizing well operation (other methods (OM)). …”
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Improvement of electrospark deposition technology of steel units for drilling rigs and mining equipment by D. N. Korotaev, E. V. Ivanova

“…To improve the performance of electrospark coatings based on an analysis of a cause-andeffect diagram and a regression study of the technological modes of processing steel units of geological exploration equipment (on the example of hydraulic cylinder rods of drilling pumps).Materials and methods. To harden the steel surfaces of hydraulic equipment parts, the technology of electrospark deposition (ESD) was used on an IMES-1001 mechanized installation using carbide electrodes and various gas media. …”
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Сomparative analysis of efficiency of use a screw drill on frozen soil by I. G. Martiuchenko, M. I. Zenin

“…A screw drill is considered, which implements the process of soil destruction by shear and shear deformation, which is less energy intensive.Materials and methods. …”
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Efficient Identification Method of Fractured Leaky Layers Based on Pressure Gauge Arrays by XING Xuesong, ZHOU Changsuo, WANG Yumei, WU Yi, SHI Jian, GU Jijun

“…The study results show that the manometer array method can obtain the downhole circumferential pressure in real time and intuitively, and accurately assess the fracture location and degree of openness through the pressure cloud map, to quantify the risk of leakage and facilitate the implementation of targeted measures such as adjusting the mud density or increasing the mud particle size, which provides a solid theoretical basis for the leakage plugging operation.…”
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Numerical Studies of Advanced Methane Drainage Employing Underground Long-Reach Directional Drilling by Wiesław Szott, Małgorzata Słota-Valim, Piotr Ruciński, Krzysztof Miłek, Piotr Łętkowski

“…This paper presents the procedures and results of the numerical modelling and simulations performed to analyse an innovative method of advanced methane drainage employing underground long-reach directional drilling (LRDD) technology. …”
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Improved drilling rigs for underground various-purpose pipelines in difficult mining and geological conditions by D. Yu. Serikov, N. D. Tskhadaya, D. A. Boreyko

“…The implementation of the proposed technologies facilitates management of the drilling process and reduces its negative impact on the environment, thus contributing to the development of directional drilling technologies.…”
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The Lobe-Type Agitator Parameters of the Seed-Metering Unit in the Seed-Fertilizer Drill Justification by D. Z. Yeskhozhin, S. O. Nukeshev, G. I. Lichman, Ye. S. Akhmetov, K. D. Yeskhozhin

“…However, the existing methods for improving and restoring forage lands and the technical means for their implementation are not adapted to the natural­climatic and agrobiological features of the zone of Central and Northern Kazakhstan, which feature insufficient moisture supply and low productivity.The main indicator of the effectiveness of the use of fodder crop seeds is their uniform distribution in the soil. …”
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Fault Diagnosis of Electric Impact Drills Based on Time-Varying Loudness and Logistic Regression by Yapeng Jing, Haitao Su, Shao Wang, Wenhua Gui, Qing Guo

“…This paper presents a psychoacoustic-based fault diagnosis method for gears of electric impact drills. The proposed methods employ acoustic signals and the time-varying loudness theory of psychoacoustic parameters. …”
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Experimental research of ice cuttings transport by air while drilling of the snow-firn layer by S. A. Ignatiev, D. A. Vasilev, A. V. Bolshunov, M. A. Vasileva, A. Yu. Ozhigin

“…The authors suggest that this technology, if successfully implemented, will significantly exceed the currently used methods of drilling the upper layers of the glacier. …”
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Application of Ultra-deep Directional Drilling Technology in the Investigation of Sichuan—Tibet Railway Tunnel by Zhengxuan XU, Jianguo LIU, Jinsheng WU, Tao FENG, Minghao CHEN, Yandong WANG, Dong YUAN

“…The conclusions show that: 1) Through the research and development of ultra-deep horizontal directional exploration technology and equipment, the problem of horizontal deep-hole drilling equipment on the Sichuan—Tibet railway has been solved, and a set of horizontal rope directional drilling equipment and technology has been innovated, achieving zero domestic breakthroughs, and forming a set of ultra-long rope coring directional exploration method. 2) The self-developed GXD–5S kilometer-level full-hydraulic power-head directional drilling rig and super-long rope core directional drilling technology have been successfully applied to the Kazila Mountain No. 1 Tunnel of the Sichuan—Tibet railway and created a domestic horizontal rope as a demonstration project the two latest records of drill pipe PQ (diameter 122 mm) with depth 588 m and HQ (diameter 96 mm) with depth 974 m. 3) Through three survey modes of horizontal drilling, oblique drilling, and upside directional drilling, special geological factors for tunnel survey design in high mountains and valleys were constructed to obtain new geological models. 4) A total of 27 ultra-deep rope coring directional exploration drilling holes were completed in the Ya’an—Changdu section of the Sichuan—Tibet railway, of which the deepest horizontal directional drilling depth was 1888.88 m. …”
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Experimental Study on Glass Deformation Calculation Using the Holographic Interferometry Double-Exposure Method by Yucheng Li, Yang Zhang, Deyu Jia, Song Gao, Muqun Zhang

“…Results demonstrate that the double-exposure method achieves optimal balance across critical performance metrics through its ideal cosine fringe field modulation. …”
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Modeling and Investigation of the Velocity-Dependent Cutting Process with PDC Cutters Using the Discrete Element Method by Zhiyi Fu, Georg-Peter Ostermeyer, Armin Kueck, Frank Schiefer, Hanno Reckmann, Xu Huang, John Bomidi

“…In this paper, a modified bonded-particle model (discrete element method, DEM) for rock in deep drilling environments is applied to the pressurized cutting process. …”
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Study on oil pilot circuit of adaptive hydraulic drive of tool advance in mobile drilling machine by V. S. Sidorenko, V. I. Grishchenko, S. V. Rakulenko, M. S. Poleshkin, D. D. Dymochkin

“…Adaptation of the hydraulic drive of the tool advance is carried out using an adjustable volumetric hydraulic motor with a hydraulic control circuit under discontinuous loads on the tool during the drilling process.Materials and Methods. Through a preliminary computational experiment in the Matlab Simulink program, the following parameters of the control loop devices were determined: a hydromechanical sensor and a hydraulically controlled valve, on the basis of which the experimental setup was implemented. …”
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Hanging Ball and Handpad Drill Training: Which is better in improving the ability of the instep serve in Sepak Takraw? by Ummu Amalia Ulfa, Rohman Hidayat, Didik Rilastiyo Budi, Kusnandar Kusnandar, Panuwun Joko Nurcahyo

“…The research concludes that the hanging ball drill and handpad drill training methods can be used to improve the ability of instep serving techniques in sepak takraw athletes, through implementing an appropriate training program.…”
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