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Article

Optimization of Hot-Water Drilling in Ice with Near-Bottom Circulation

Polar Research Center, Institute for Polar Science and Engineering, Jilin University, Changchun 130026, China
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Academic Editor: Alexander Yakirevich
Water 2022, 14(1), 127; https://doi.org/10.3390/w14010127
Received: 14 November 2021 / Revised: 26 December 2021 / Accepted: 3 January 2022 / Published: 5 January 2022
(This article belongs to the Section Hydrogeology)
Hot-water drilling in ice with near-bottom circulation is more advantageous than traditional hot-water drilling with all-over borehole circulation in terms of power consumption and weight. However, the drilling performance of this type of drill has been poorly studied. Initial experiments showed that drilling with single-orifice nozzles did not proceed smoothly. To achieve the best drilling performance, nozzles with different orifice numbers and structures are evaluated in the present study. The testing results show that a single-orifice nozzle with a 3 mm nozzle diameter and a nine-jet nozzle with a forward angle of 35° had the highest rate of penetration (1.7–1.8 m h−1) with 5.6–6.0 kW heating power. However, the nozzles with backward holes ensured a smoother drilling process and a larger borehole, although the rate of penetration was approximately 13% slower. A comparison of the hollow and solid thermal tips showed that under the same experimental conditions, the hollow drill tip had a lower flow rate, higher outlet temperature, and higher rate of penetration. This study provides a prominent reference for drilling performance prediction and drilling technology development of hot-water drilling in ice with near-bottom circulation. View Full-Text
Keywords: near-bottom circulation; nozzles; hot-water drilling; thermal tip near-bottom circulation; nozzles; hot-water drilling; thermal tip
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MDPI and ACS Style

Zhao, G.; Talalay, P.G.; Fan, X.; Zhang, N.; Liu, Y.; Wang, T.; Chen, Y. Optimization of Hot-Water Drilling in Ice with Near-Bottom Circulation. Water 2022, 14, 127. https://doi.org/10.3390/w14010127

AMA Style

Zhao G, Talalay PG, Fan X, Zhang N, Liu Y, Wang T, Chen Y. Optimization of Hot-Water Drilling in Ice with Near-Bottom Circulation. Water. 2022; 14(1):127. https://doi.org/10.3390/w14010127

Chicago/Turabian Style

Zhao, Gaoli, Pavel G. Talalay, Xiaopeng Fan, Nan Zhang, Yunchen Liu, Ting Wang, and Yanji Chen. 2022. "Optimization of Hot-Water Drilling in Ice with Near-Bottom Circulation" Water 14, no. 1: 127. https://doi.org/10.3390/w14010127

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