Question

What is drilling in extraction of crude oil

Answer 1

I hole is creates from drilling for oil deep into the earth you can find many of these in Los Angeles, California l

Answer 2

The oil well is created by drilling a long hole into the earth with an oil rig. A steel pipe (casing) is placed in the hole, to provide structural integrity to the newly drilled well bore. Holes are then made in the base of the well to enable oil to pass into the bore.