Worst is yet to come for shale drilling, biggest rig owner warns

Workers on Big Dog Drilling Rig 22, owned by Endeavor Energy Resources, L.P., on the outskirts of Midland, Texas, connect drill bits and drill collars used to extract natural petroleum on Friday, December 12, 2014. (Brittany Sowacke/Bloomberg)
Workers on Big Dog Drilling Rig 22, owned by Endeavor Energy Resources, L.P., on the outskirts of Midland, Texas, connect drill bits and drill collars used to extract natural petroleum on Friday, December 12, 2014. (Brittany Sowacke/Bloomberg)

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