Deflected wells
1.
Vertical well
2.
Deflected or kick-off well
3.
Inclined well
4.
Horizontal drilling (or road-tunneling technique)
D
eflected wells are used:
when the drilling zone is inaccessible, or in densely populated areas,
to circumvent an obstacle such as a salt dome,
after a drilling accident,
and above all at sea, to save having to shift a platform.
