BUZZ-Drillers, oilfield services providers: Brent at 4-year low
** Drilling contractors and oilfield services providers' stocks down 3-8 pct as Brent crude oil hits four-low year
** Top oil exporter Saudi Arabia cuts sales prices to the United States
** Brent crude oil at $82.41 a barrel, down about 28 pct since June high of $115.06
** U.S. crude prices down 2.8 pct at $76.78 a barrel
** Halliburton Co shares down 5.5 pct, Schlumberger Ltd 3 pct, Baker Hughes Inc down 4.5 pct
** Precision Drilling Corp and Parker Drilling Co down 8 pct
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