borehuller
Borehuller are drilled holes made in the earth to access subsurface resources or to gather subsurface information. The term is used in Danish and Norwegian and is commonly translated as boreholes in English. Borehuller vary greatly in size, depth, and purpose, from a few meters for domestic water to several kilometers for oil, gas, or geothermal projects. They may be vertical or inclined.
Drilling techniques include rotary drilling, percussion (hammer) drilling, and auger drilling. Most production boreholes are lined
Applications cover water supply, mineral and hydrocarbon exploration, geothermal energy, environmental monitoring, and storage or waste
Decommissioning or abandonment involves permanently sealing the borehole to prevent cross-contamination or subsidence, following regulatory requirements.