After first-half surge, U.S. drillers find respite in guar wars

Reuters: U.S. oil and gas drillers are finally catching a break from the surging cost of a tiny seed at the heart of the nation's oil and gas bonanza. After a surprise three-fold price surge in the first five months of 2012, which roiled earnings for oil services firms and threatened to stall the domestic boom, the price of guar gum -- used to thicken the slurry of water, sand and chemicals that is pumped into wells during hydraulic fracturing -- has halved over the past few weeks. Prices have tumbled......

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