I thought I would give you an update. I found a tap and wratchet at harbor freight and followed Catt22's instructions and everything worked fine. I think I was pretty fortunate in that there was enough thread exposed for the tap to get started. My dip tube is firmly sealed so thank you all for the responses. Furthermore, I can return the tap to harbor frieght.
I didn't take it back to the guy that did it because he did it for free. I guess that's what I get for free labor.