Oil Drilling Drops to 15-Year Low With Shale in Full Retreat
The silhouettes of pumpjacks are seen above oil wells in the Bakken Formation near Dickinson, North Dakota. (Photographer: Daniel Acker/Bloomberg)

Oil Drilling Drops to 15-Year Low With Shale in Full Retreat

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(Bloomberg) -- Drillers cut exploration in U.S. oil fields to a 15-year low as billions of barrels from old discoveries became worthless and explorers abandoned growth plans.
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