available via Lexis-Nexis] Nomac Drilling Corp. derrick man Justin Spruell, right, climbs down from an overhead platform after connecting a section of drill pipe on a Chesapeake Energy Corp. natural gas drill site in Bradford County, Pennsylvania, U.S., on Tuesday, April 6, 2010©Bloomberg US production of liquid petroleum is surpassing its previous peak, reached in 1970, in the latest landmark for the country’s shale oil boom. Four decades of decline in US oil output have been reversed in just five…
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