||It has been suggested that this article be merged with borehole. (Discuss) Proposed since June 2015.|
A wellbore, drill hole or borehole is a hole drilled for the purpose of exploration or extraction of natural resources such as water, gas or oil where a well may be produced and a resource extracted for a protracted period.
It is estimated that wellbore instability results in substantial economic losses of about US$8 billion per year worldwide.
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