通过在基岩的很大一部分区域钻深井，可以获取远离构造边界或地质热点的高温地热资源。本文评估了快速冷却对岩石切割过程的影响，并将这种影响纳入钻井性能优化方法中。
为获取地热而建造的深井需要钻入大陆地壳的基底。在不可渗透的火成岩或变质岩中获取地热资源被称为钻探干热岩 (HDR)。
HDR 的特点是渗透性低、孔隙度最小、初始水饱和度可忽略不计，通过传导热交换保持高温。HDR 是通过传统的旋转钻井技术从地面进入的，在滚锥钻头的轴向载荷下，HDR 会在压缩时失效，在固定切削齿钻头的聚晶金刚石切削齿 (PDC) 的轴向和切向载荷下，HDR 会在压缩剪切时失效。
在 HDR 钻井过程中，循环的钻井液通过井底组件 (BHA) 进入环空。
High-temperature geothermal resources at a distance from tectonic boundaries or geologic hotspots can be accessed by the drilling of deep wells through significant sections of basement rock. This paper evaluates the effect of rapid cooling on the rock-cutting process and incorporates this effect into a drilling-performance optimization approach.
Construction of deeper wells for geothermal heat involves drilling into the basement of the continental crust. Accessing geothermal resources in impermeable igneous or metamorphic rock is referred to as drilling hot dry rock (HDR).
HDR, characterized by low permeability, minimal porosity, and negligible initial water saturation, maintains high temperatures through conductive heat exchange. Accessed from the surface by conventional rotary-drilling technologies, HDR fails in compression under axial loading of roller-cone drill bits and fails in compression shear under axial and tangential loading of polycrystalline-diamond cutters (PDC) in fixed-cutter drill bits.
During HDR drilling, circulated drilling fluid exits through the bottomhole assembly (BHA) into the annulus.
