Annulus
The space between two concentric objects, such as between drill pipe and casing or between a core barrel and the borehole wall, where fluid can flow. Also, the area between the casing and the production tubing.
The space between two concentric objects, such as between drill pipe and casing or between a core barrel and the borehole wall, where fluid can flow. Also, the area between the casing and the production tubing.
