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Записки Горного института, 2019 The radial drilling technology efficiency for carbonate bashkir deposits of Perm Krai is considered. The geological structure of a productive part of bashkir layer is characterized by high degree of heterogeneity that promotes while drilling radial ...
S. V. Galkin +2 more
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Review: Horizontal, directionally drilled and radial collector wells [PDF]
Hydrogeology Journal, 2022 AbstractHorizontal wells play an often overlooked role in hydrogeology and aquifer remediation but can be an interesting option for many applications. This study reviews the constructional and hydraulic aspects that distinguish them from vertical wells.
Georg J. Houben +5 more
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Research on the Step Drilling System for Water Jet Radial Drilling
Shiyou jixie, 2021 The low traction force of the front-end nozzle for water jet radial drilling limits the drilling distance. The ground run drilling method has complex force transmission, large run-in-hole fluctuation, and has difficulty in the ground precise control of ...
Chen Zhi +5 more
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Effective Geothermal Utilisation close to the surface by the TT-Geothermal Radial Drilling (GRD-)Method [PDF]
Acta Montanistica Slovaca, 2007 In the late 1970-Years, Tracto-Technik developped a very effective radial-shaped percussion system for a geothermal heating, the ECOtherm-System, which was very well accepted by customers.
Hans-Joachim Bayer
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Flow structure and rock-breaking feature of the self-rotating nozzle for radial jet drilling
Petroleum Science, 2019 For improving the hole-enlarging capability, roundness and rock-breaking efficiency of the nozzle in radial jet drilling, a new structure of self-rotating nozzle was put forward.
Hua-Lin Liao +5 more
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A new physical simulation system of drilling mud invasion in formation module
Petroleum Exploration and Development, 2017 After several key technologies, including the saturation and pressurization of large sample, design of invasion room, sealing and pressure maintaining of the apparatus, and dynamic monitoring of the entire invasion process were solved, a multifunctional ...
Yiren FAN +4 more
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Study on the rock‐breaking effect of water jets generated by self‐rotatory multinozzle drilling bit
Energy Science & Engineering, 2020 Underground radial drilling technique is a novel hydraulic stimulation technology, which is one of the important ways to realize precise, intelligent, and efficient extraction of the gas resources.
Yanbao Liu +4 more
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Initiation mechanisms of radial drilling‐fracturing considering shale hydration and reservoir dip
Energy Science & Engineering, 2021 Radial drilling‐fracturing is an innovative fracturing technology that achieves superior stimulation effects. This paper develops a model for radial drilling‐fracturing in shale reservoirs, which can predict fracture initiation pressure and failure mode ...
Yuxin Chen +5 more
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Drilling Performance of Self-propelled Straight-Rotary Mixing Nozzle
Shiyou jixie, 2022 In order to improve the application results of hydraulic radial drilling technology in hydrate exploitation and reservoir stimulation,numerical simulation method was used to study the drilling performance of self-propelled nozzle,which is the core ...
Gao Junhong, Fu Biwei, Dong Zongzheng
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Lateral Vibrations in Deep Hole Drilling Due to Land Width Variation
Journal of Manufacturing and Materials Processing, 2020 In drilling processes, self-excited vibrations have a negative influence on the achievable drilling qualities and tool life. Low-frequency radial vibrations are characterised by oscillating movements of the tool tip and the generation of lobed holes in ...
Marcel Volz +2 more
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