rrick.
IV. Drilling for oil often means making a well that goes very deep into the earth. Such
deep wells have never been made until modern times. The rate of drilling depends
upon the kind of rock being drilled: it can be as fast as 60 meters an hour. Drilling is
usually done on dry land, but we can also drill the rock under lakes or seas by putting
the derrick on a special platform above the water
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The properties of these hydrocarbons depend on the number and arrangement of the ... Crude oil and natural gas are believed to have been formed over millions of years by the decay of ...
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