For Annulus we have terms and definitions in 6 topics. The topics are Energy, Fish, Import Cars, Math, Natural Gas and Oil.

Annulus (Energy)

The space between the drill string and the earthen wall of the well bore, or between the production tubing and the casing.

Annulus (Fish)

A mark or ring that forms annually on the otoliths, scales, and other bones of fish, that correspond to the annual period of slow growth that fish go through. Annuli are used by fish managers to determine age and growth of fish.

Annulus (Import Cars)

Any type of ring gear, including the ring part of the ring and pinion in the rear end, and the gears in the planetary gear set of an automatic transmission.

Annulus (Math)

The portion of a plane bounded by two concentric circles in the plane.

Annulus (Natural Gas)

The space between two concentric lengths of pipe or between pipe and the hole in which it is located.

Annulus (Oil)

The space between two concentric lengths of pipe or between pipe and the hole in which it is located.

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