Wells' score of 83 was made up from his two best runs - a doublecork 1260 and a switch doublecork 1440, scoring 44 and 39 points.
Bobby Brown of the United States took out the gold medal with 88 points.
Wells threw his helmet into the crowd from the podium to celebrate his success, where it was picked up by Tim Pierce - a photographer from Wells' hometown of Wanaka.
Wells' Facebook page was filled with comments congratulating him on his performance. The skier commented that he was "stoked" with his placing.
The young skier won his first X Games medal at just 17-years-old, taking out second place in the 2008 slopestyle event.
His second silver medal followed two years later, during the 2010 half-pipe event.
- Newstalk ZB and Herald Online