Directional Drilling

The practice of steering the trajectory of a well during drilling from vertical to a deviated angle, including horizontal drilling used for oil and gas production from poorly permeable rocks. Directional drilling may also be used to maneuver around obstructions or to drill beneath areas that are inaccessible on the surface.

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Word of the Week – Drill Cuttings

Word of the Week – Drill Cuttings

Drill Cuttings Small chips of rocks (e.g., <1/8 inch or <3 mm) obtained during drilling with a rotary bit that are continuously returned to the surface by the circulation of mud....

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Word of the Week – Epidote

Word of the Week – Epidote

Epidote Alumino-silicate hydrothermal mineral having a distinctive yellow-green color that is used a mineral geothermometer, forming at temperatures above ~230°C. The first down hole...

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