Turkey says a lot of things when it comes to sending its troops all the way down to Mosul and Sinjar. That's pure bluster. In Syria it's not as much the case. Turkey may capture it, and its allied Free Syrian Army forces may capture al-Bab soon. That's a less complicated endeavour. I wouldn't expect Turkey's ventures into Iraq to be extensive. I'd be more concerned about Turkey in Syria.
On November 15th, 2016. See this statement in context.