I read a story when Sam finds a book of different types of Devil's Traps in the Men of Letters bunker and starts to experiment with them. He draws one and gets stuck in it and can't get out. I remember that Sam thought it was because of the demon blood but that wasn't why he was stuck. I think Dean ends up rescuing him in the end, he might have been stuck for a couple of days?

Fic found, Beyond Good and Evil