If the dolphins beat the bills next week, the pats can clinch the division by beating the bills in their next game. The dolphins and jets are already eliminated from the division.
Since they beat the colts, they just need to match the colts the rest of the way. If the colts don't lose again, the pats would clinch only after week 16. If the colts 1 other game, the pats can clinch after week 15.