To say Sam was enraged by Uriel playing dumb in what was supposed to be their fated encounter after such a long time would have been the understatement of the millennium. Sam had pictured that fight in his mind many times in the past, but no matter how hard he tried he couldn't picture a scenario where Uriel could possibly win against his overwhelming power and immortal body.
However, he wasn't so stupid as to repeat his past mistake and follow Uriel into a sinkhole where he would be at a disadvantage. At least not until he made sure he still had the upper hand.
As a holy rank hunter he didn't need to worry much about weapons since he knew the only reason Uriel was able to stab him was due to Uriel using Sam's own power against him. It was a small mistake that could be easily corrected since thanks to Water warlock would regenerate any and all of his wounds on the spot.