Sinopec, PetroChina persevere with shale gas as drilling costs fall http://t.co/j7DCeoNKfl #MasterEnergy #naturalgas

Sinopec, PetroChina persevere with shale gas as drilling costs fall http://t.co/j7DCeoNKfl #MasterEnergy #naturalgas

— MasterEnergy (@MasterEnergyRSS) March 30, 2015

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March 30, 2015 at 12:22PM

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