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Well borehole environment

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.[1]

See also[edit]


  1. ^ Suping Peng; Jincai Zhang (14 October 2007). Engineering Geology for Underground Rocks. Springer. pp. 161–. ISBN 978-3-540-73295-2. Retrieved 12 August 2013. 

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