Brent crude edged down to just below $93/B on Wednesday, as heightened concerns that European leaders would fail to resolve the region’s crippling debt crisis at a key meeting this week offset worries about tighter North Sea supplies. Brent crude edged down 10 cents to $92.92/B early on Wednesday , while US crude was at $79.50/B, up 14 cents , supported by expectations of a drop in domestic oil stocks.