Halliburton Warns Significant Frack Growth May Be Impossible This Year Fracking, or hydraulic fracturing, is an oil extraction technique that involves high-pressure water blended with sand and chemicals, forced into underground rocks known as shale to capture oil and gas. The process was revolutionized by horizontal drilling in the 1980s and 2000s, transforming America into the world''s largest oil producer overnight. American shale drillers have shown how quickly they can boost oil production over the years. But after several years of divestment and decarbonization, the days of fracking roaring back to life…