Characterization of drilled hole in low melting point material during low power microwave drilling process

Lautre, Nitin Kumar; Sharma, Apurbba Kumar; Kumar, Pradeep; Das, Shantanu

doi:10.1088/2053-1591/ab3299

Cited by 5 publications

(1 citation statement)

References 31 publications

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“…The high charge energy causes the plasma channel to expand, thus realizing the electrical fracture of the rock mass [6][7][8]. The industrialization promotion in the fields of rock crushing and oil and gas extraction [9,10], ore particle decomposition [11], and scale purification [12] shows that HVEP technology has achieved good energy consumption benefits. However, the multi-physics coupling rock-breaking mechanism involved in HVEP technology is difficult to describe.…”

Section: Introductionmentioning

confidence: 99%

The sensitivity analysis of dynamic electric breakdown damage model and simulation of granite by high voltage electric pulse

Liu

Zhang

Zhu

et al. 2023

J. Phys. D: Appl. Phys.

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The use of high-voltage electrical pulse (HVEP) technology for improving the rate of penetration (ROP) in deep, complex formations has been reported; however, its rock fragmentation mechanism is not fully understood, and the parametric design of electric drilling tools is not perfect. This research paper realized the whole process of single-pulse HVEP rock-breaking by using the electric breakdown model, combining circuit parameter coupling, Kirchhoff's law, electric breakdown criterion, heat transfer process, and solid mechanical field. The sensitivity simulation of HVEP rock-breaking parameters, which considers the structural parameters of pulse power supply, the deterioration of rock during the electrical breakdown process (EBP), the correlation between dynamic dielectric strength of rock and time, and rock heterogeneity, is analyzed. The simulation results indicate that the shape of the plasma channel has little relationship with the pulse peak voltage, and the rock-breaking volume of a single pulse is positively related to the pulse peak voltage; the electrode spacing is positively correlated with the breakdown voltage of the rock in a first-order function shape and has a positive correlation with the failure volume; large electrode spacing can promote HVEP rock-breaking; electrode tilt has little effect on the minimum breakdown voltage and failure volume, and its optimal design should be combined with the flow field analysis of the electric bit structure; the heterogeneity index of granite results in breakdown voltage amplitudes within 3 kV and differences in the fragmentation effect of HVEP. The research results can be used as theoretical support for optimizing HVEP matching drilling tools.

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