NEW YORK, Nov. 21 (Xinhua) -- Oil prices settled mixed on Tuesday.

       The West Texas Intermediate (WTI) for January delivery dropped 6 cents, or 0.08 percent, to settle at 77.77 U.S. dollars a barrel on the New York Mercantile Exchange. Brent crude for January delivery went up 13 cents, or 0.16 percent, to settle at 82.45 dollars a barrel on the London ICE Futures Exchange.