A job on the oil rig is no easy job, but it sure does pay well. As well it should. Oil rig workers need to live on the oil rig for large periods of time, doing incredibly dangerous and dirty work. Whenever you're being pulled away from your family or life, the job will pay well. It's also intermittent work, so you're not out on the rig forever. You get periods where you're not working at all while you wait for the next job.
The biggest consideration is the one towards safety. The injury rate is incredibly high, and that includes fatal injuries. It's a little hard to walk into a job when you know that getting seriously injured is an inevitability. Some people can not only deal with that, but they also thrive in it. Maybe not in the way where they're excited to get hurt, but that deep down the danger is exciting.