An oil rig is a massive structure used to drill oil (Check Rig Components) in offshore and onshore conditions. These engineering marvels weigh thousands of tons and are loaded with many functionalities. Drilling rigs come in different sizes and types; some are more fascinating than others. Remember that the biggest oil rigs take billions of dollars and years to build.
https://www.drillingmanual.com/biggest-oil-rigs/
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