Tulsa county sheriff's deputies busted a working meth lab in Collinsville this weekend and arrested four people. It started with a tip to the sheriff's office about a meth lab in the back of a house in Collinsville. Deputies went to check it out and smelled the unusual odor of a meth lab as soon as they rolled up in the yard.The lab was in the shop area of a home and scrap metal business right along highway 169 north. Deputies and Collinsville police raided the lab early Saturday. Deputies say it was unusual in the number of people involved in the lab, and the scope of the operation, especially in a visible location with lots of people around.