It is the easiest way to find oil deposits.
Because it's there. If there are oil reserves in a country you drill for them.
Drill for oil
to extract the oil out of the ground
An oil platform with an industrial drill.
NO
Yes.
The ability to drill oil has made the American economy and infrastructure what it is today. Everything that moves, seemingly is powered ultimately by oil.
An oil rig
Becuase oil refuses to drill itself.
Oil Well/Drill/Rig?
One is called an oil drill.
approximately in 1859