If I were to do it, I'd probably do it for like 5ish years then move to something else. Tough job, no life, and the chemicals and stuff you are exposed to are probably really bad in the long term if exposure is too long. Though the longer you can tough it out the more money you will make. Live like you make 50k, and invest/save the rest.
Though I think these jobs tend to be like 2 weeks on, 2 weeks off, or something like that. If that's the case, you can still have quite a good life given you get all that time off but when you're on the job you don't have much life as the shifts are probably very long and you are probably away from home. I have a shiftwork job where I work lot of 12 hour shifts, but get lot of time off. 160h 4-week periods, basically. So the more 12's I work the more time off I get. I would have a lot of trouble having to go back to 8*5.