DEFINITION of 'Wellbore'

A wellbore is a hole that is drilled to aid in the exploration and recovery of natural resources including oil, gas or water. A wellbore is the actual hole that forms the well. A wellbore can be encased by materials such as steel and cement, or it may be uncased.

BREAKING DOWN 'Wellbore'

A wellbore provides access to the natural resources that are sought, such as oil and gas. A wellbore is typically a straight shaft that "bores" into the ground to allow the recovery of natural resources. Specialized equipment is needed to drill wellbores.

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