Numerical analysis on the impact of the flow field of hydrothermal jet drilling for geothermal wells in a confined cooling environment

•Hydrothermal jet drilling technology is proposed by combining the advantages of thermal spallation and high pressure water jet methods.•Two cooling configurations are presented and recommended for different drilling demands.•The characteristics of impact flow field of a hydrothermal jet in a confin...

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Veröffentlicht in:	Geothermics 2017-03, Vol.66, p.39-49
Hauptverfasser:	Song, Xianzhi, Lv, Zehao, Li, Gensheng, Hu, Xiaodong, Shi, Yu
Format:	Artikel
Sprache:	eng
Schlagworte:	Annuli Carrying capacity Configurations Cooling Cooling water Design parameters Drilling Drillstrings Exploitation Flow Flow field Fluid dynamics Geothermal power Geothermal resources High temperature Hydrothermal jet Impact analysis Numerical analysis Numerical simulation Reaming Return flow Rocks Simulation Spallation Technology Temperature effects Velocity Vortices Water velocity Wells
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