Sidetracking is the term used for drilling a directional hole to bypass an obstruction in the well that cannot be removed or damage to the well, such as collapsed casing that cannot be repaired. ... To sidetrack, a hole (window) is made in the casing above the obstruction.
What is a sidetrack in drilling?
1. vb. [Drilling] To drill a secondary wellbore away from an original wellbore. A sidetracking operation may be done intentionally or may occur accidentally. Intentional sidetracks might bypass an unusable section of the original wellbore or explore a geologic feature nearby.
What are deviated wells?
A well with an inclination other than zero degrees from vertical. In practice, deviated wells are usually more than about 10o from vertical.
