What is the deepest oilwell ever drilled?
Among the deepest wells in the world have been the “Kola Superdeep Borehole,” a 1989 experimental well drilled the Soviet Union. It reached 40,230 feet deep. In 2008, an oil well was drilled to 40,318 feet in Qatar. In 2011, a 40,502-foot well was drilled offshore of the Russian island of Sakhalin.
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