U.S. shale well drilling investment surged
in 2011
An estimated $65.5 billion was invested drilling an estimated 10,173 U.S. shale oil and natural gas wells in 2011.
Full Articlehttp://www.pennenergy.com/articles/pennenergy/2013/04/us-shale-well-drilling-investment-surged-in-2011.html?cmpid=EnlDailyPetroApril302013
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