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Drill Bit
A tool that is placed on the end of a string of pipe to drill a well. Rotary drill bits are commonly used in oil and gas and geothermal drilling. Coring bits are used to obtain cylindrical core samples of rock that preserve mineralogical and textural features which are commonly destroyed during rotary drilling.
Geothermal Glossary
Word of the Week – Vadose Zone
Vadose Zone A hydrogeological term that represents the volume of rock and unconsolidated materials between the ground surface and the underlying water table, in which pores and cracks are filled or partially filled with air.
Word of the Week – Vapor-Dominated Reservoir
Vapor-Dominated Reservoir he highest grade of geothermal resource in which self-flowing wells produce dry steam from a reservoir containing a mixture of hot water and steam. Larderello, Italy and The Geysers, California, USA are examples, and they are extremely...
Word of the Week – Wairakite
Wairakite A zeolite mineral of hydrothermal origin that was first identified in the Wairakei geothermal field in New Zealand by Alfred Steiner. It forms clear to white prismatic crystals, which have a distinctive cross hatched twinning, and it is commonly associated...