BUZZ-Oil drillers: Oil prices at fresh 5-1/2-year lows
** Oil drillers' shares fell on Monday as oil prices slid to a fresh 5-1/2-year lows
** Oil prices have been dipping on concerns of a supply glut and lackluster demand, losing more than half their value since a peak in June last year
** Brent crude hovered at $53 a barrel, while U.S. crude fell to $50.23 a barrel at 11:48 a.m. ET
** Precision Drilling Corp shares down 10.5 pct at C$6.38, Patterson-UTI Energy Inc down 5.6 pct at $15.71, Nabors Industries Ltd down 5 pct at $11.86, Helmerich & Payne Inc down 4 pct at $64.65
** Diamond Offshore Drilling Inc down 5.2 pct at $35.29, Seadrill Ltd down 8 pct at $11.04, Transocean Ltd down 7.2 pct at $16.81, Ensco Plc down 5.4 pct at $28.53
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