Electro-pulse-boring (EPB): Novel super-deep drilling technology for low cost electricity

Schiegg, Hans O.; Rødland, Arild; Zhu, Guizhi; Yuen, David A.

doi:10.1007/s12583-015-0519-x

Cited by 61 publications

(32 citation statements)

References 1 publication

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“…An EPB drilling platform was developed in Norway in 2009, where 381 mm shallow holes were drilled in hard rock. Then, in 2011, EPB was combined with conventional rotary drilling to drill with a breaking volume of 19 cm 3 per pulse [1]. In addition, Inoue et al [12], Bluhm et al [13], Biela et al [5], and Vizir et al [14] have developed high-voltage pulse power supplies.…”

Section: Pulse Power Supplymentioning

confidence: 99%

“…Traditional mechanical drilling techniques have the disadvantages of low efficiency and high cost when used for deep and ultra-deep holes and hard rock such as granite. Therefore, research into high-efficiency technology for the drilling of rock is imperative [1,2]. At present, the main methods of non-mechanical rock breakage are by water jet, laser drilling, high-voltage electro pulse discharge, ultrasonic waves, and heat energy [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…At present, the main methods of non-mechanical rock breakage are by water jet, laser drilling, high-voltage electro pulse discharge, ultrasonic waves, and heat energy [3,4]. EPB [1], a type of high-voltage electro pulse discharge drilling, has high rock-breaking efficiency and produces good wall quality. Hence, it is a new and efficient potential rock breaking technique.…”

Section: Introductionmentioning

confidence: 99%

“…The energy consumption and drilling efficiency of EPB tools need to be further improved. The former Soviet Union developed a pulse plasma drilling rig suitable for drilling holes of 30-50 mm diameter at a speed of 15 cm/min [1]. Timoshkin et al [10] designed a plasma channel drill bit that has a radially symmetric electrode and used it to achieve a drilling speed of 16 cm/min in sandstone.…”

Section: Introductionmentioning

confidence: 99%

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Influences on High-Voltage Electro Pulse Boring in Granite

Duan

Tan

et al. 2018

Energies

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As the exploration and drilling of oil, natural gas and geothermal wells are expanding continuously, research into high-efficiency rock drilling technology is imperative. High-voltage electro pulse boring (EPB) has the advantages of high rock breaking efficiency and good wall quality, and is a new and efficient potential method of rock breaking. The design of electrode drill bits and the selection of drilling process parameters are the main obstacles restricting the commercialization of EPB. Accordingly, it is necessary to determine the influences on high-voltage EPB. In this study, based on the equivalent circuit of high-voltage electro pulse breakdown, a mathematical model of high-voltage electro pulse discharge in rock is established. Meanwhile, a numerical simulation model of high-voltage EPB of hard granite is established based on a coaxial cylindrical electrode structure, which is often used for electrode drill bits. The simulation analysis software Comsol Multiphysics (Comsol Multiphysics®5.3a, COMSOL Co., Ltd., Stockholm, Sweden) is used to study the influences of granite composition, electrode spacing and electrode shape on the high-voltage EPB process. In addition, the influences of electrical parameters on high-voltage EPB are calculated according to a model of high-voltage electro pulse discharge in rock. Finally, it is demonstrated that high-voltage EPB is influenced by granite composition, electrical parameters, electrode spacing, and electrode shape, and the relationships between these factors are obtained. This study is of guiding significance for improving rock breaking efficiency, reducing energy loss, designing electrode drill bits and selecting drilling process parameters.

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Section: Pulse Power Supplymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influences on High-Voltage Electro Pulse Boring in Granite

Duan

Tan

et al. 2018

Energies

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“…It is, therefore, an imperative to study high-efficiency rock-breaking drilling technology. High voltage electro pulse rock breaking technology has the characteristics of controllable energy, no pollution, and no flying stones [3]. Rock breaking using high voltage electro pulse discharge can be divided into hydroelectric and electric pulse rock breaking.…”

Section: Introductionmentioning

confidence: 99%

Damage Model and Numerical Experiment of High-Voltage Electro Pulse Boring in Granite

Duan

Tan

et al. 2019

Energies

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High-voltage electro pulse boring (EPB) has the advantages of high rock-breaking efficiency and good wall quality, and is a new and efficient potential method of rock breaking. The EPB process is defined as random because it is affected by many factors. At present, there is no suitable physical and mathematical model to describe the process and results of rock breakage in EPB, and the conclusions reached regarding rock-breakage mechanisms are not uniform. In this study, a complete damage model of high voltage EPB in granite is established, which includes a shock wave model and a damage model of high voltage EPB in granite. The damage model is based on the Particle Flow Code two-dimensional program. Use of a damage model of EPB accommodates the complete process of high voltage EPB, from discharge to production of a shock wave, and so rock-breaking via electro pulse can be simulated and calculated. The time-varying waveforms of shock waves with different electrical parameters are simulated and calculated on the basis of the model. Different shock wave forms are loaded into the surface and internal rock in the damage geometric model of EPB granite. Then, the breakage process of the rock surface and internally, and the mechanism of rock breakage using EPB are analyzed. This study provides a scientific basis for the quantitative expression and prediction of rock fragmentation in EPB in order to improve the drilling efficiency and reduction of energy loss in the process of EPB.

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The effect of magnetic field on the electric breakdown trajectory of high‐voltage electric pulse rock breaking

Liu,

Zhou,

Zhu

2023

Contributions to Plasma Physics

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High‐voltage electric pulse drilling technology has the advantages of high rock‐breaking efficiency, low energy consumption for rock breaking, and good quality of well wall, which is a new and efficient potential rock‐breaking method. In this paper, we constructed a numerical simulation model of rock electric breakdown and realized the whole process of rock breaking and plasma channel generation by high‐voltage electric pulse. The results of the study showed that the change of magnetic field has a large influence on the formation of plasma channels inside the rock, and under the self‐magnetic field environment, the plasma channels inside the rock show branching, and the maximum penetration depth and maximum damage depth are higher than those under the non‐magnetic field environment. In the external magnetic field environment, the plasma channels gradually tend to develop “downward” (inside the rock), and the temperature distribution of the plasma channels inside the rock is more concentrated. In the presence of a magnetic field, the speed and degree of freedom of charged particles are limited. In an external magnetic field environment, the charged particles cause fewer particles to deviate, and the particles show a “downward” accumulation phenomenon. The research in this paper can provide certain theoretical and technical guidance for the development of electric pulse rock‐breaking technology and provide reference for the development and parameter optimization of electric pulse rock‐breaking tools.

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Electro-pulse-boring (EPB): Novel super-deep drilling technology for low cost electricity

Cited by 61 publications

References 1 publication

Influences on High-Voltage Electro Pulse Boring in Granite

Influences on High-Voltage Electro Pulse Boring in Granite

Damage Model and Numerical Experiment of High-Voltage Electro Pulse Boring in Granite

The effect of magnetic field on the electric breakdown trajectory of high‐voltage electric pulse rock breaking

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