Directional (deviated) well

What is Directional (deviated) well?

Directional (deviated) well meaning A well purposely deviated from the vertical, using controlled angles to reach an objective location other than directly below the surface location. A directional well may be the original hole or a directional “sidetrack” hole that deviates from the original bore at some point below the surface. The new footage associated with directional “sidetrack” holes should not be confused with footage resulting from remedial sidetrack drilling. If there is a common bore from which two or more wells are drilled, the first complete bore from the surface to the original objective is classified and reported as a well drilled. Each of the deviations from the common bore is reported as a separate well.


reference: Glossary – U.S. Energy Information Administration (EIA)

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