1. Without oil the modern world could not exist. Oil is needed for travel, because it
powers our motor cars, buses, trains, aeroplanes and ships. Oil helps machines of all
kinds, to run easily. Oil also gives us other substances, such as artificial rubber,
artificial materials for clothing, and new materials for making things. Yet till a hundred
years ago no one used oil for any of these purposes. In fact, no one knew that much oil
existed.
2. Men do not make oil; they find it. They look for oil in many ways. They begin by
making a map of the land where they are searching. Then they use the map to help them
in choosing a site to explore with more care. They start their work by examining the rock
from under the surface and come to know whether oil is likely to be underneath the
rock.
3. To find out how deeply the oil is buried they need to know how far under the surface
the rock is. If everything seems hopeful the men decide to drill down through the rock.
In this way they find out whether oil really does lie underneath it. Often this test – well,
as it is called, is far away from any town and there is much work to do before any
drilling starts. Houses and roads must be built for the people coming to drill the test –
well. Then the big derrick that carries the drill must be put up. This derrick is a strong
framework of steel about 45 meters high. The drill is raised and lowered from inside the
derrick.
4. 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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