Wellbore
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.
See also
Drilling rig
Hydrocarbon exploration
Wildcatter
Hubbert peak theory
References
External links