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shale revolution has helped boost United States to position of worlds biggest crude oil producer ahead of Saudi Arabia and Russia A shale revolution has helped boost the United States to the position of worlds biggest crude oil producer ahead of Saudi Arabia and Russia PositiveU.S. energy firms this week cut the number of oil rigs operating for the first time in three weeks week after U.S. crude production hit an alltime high boosting exports to a record high and stockpiles to their highest in over a year http://www.reuters.com/subjects/aerospace-and-defense/article/us-usa-rigs-baker-hughes/u-s-oil-drillers-cut-rigs-for-first-week-in-three-baker-hughes-idUSKCN1QB26I2019-02-23