How Offshore Oilrigs Work, Float, and Extract Oil

Offshore drilling is the process of extracting petroleum from reserves located beneath the Earth's oceans instead of reserves located on the mainland. Offshore oil rigs have developed greatly over the past years, and have become gigantic structures that house hundreds of people at a time.

0:55 How it floats
1:35 What's on the oilrig
2:30 Drilling
3:27 Blowout Preventer

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