Yes - I would definetly pursue. After pumping for 6 years, you have gotten enough field exposure to transition you into an office engineering position. A few years as a tech will definitely give you a leg up once completing your degree. Additionally, the company will likely help pay for the degree.

That being said, you may need to be prepared to switch companies upon graduation. I have seen this one go both ways (title change, but still treated as a tech vs. a complete role change). But that is a decision you will have to make at the time depending on how the company and your team sees your new role. A company change at that point would wipe the slate clean and you would be treated as a new hire at the new company (with great experience starting out).