Not at all. Summer off is 2 months during which you are supposed to prepare. And you are not allowed to take random holidays outside of that season, unlike other professions. As sibling said, rigs frequently work on 2 weeks off every month.

Second difference is that schools do not want revolving doors of teachers, each leaving after a year or two. That is completely normal on oil rigs. People work on rigs temporary, until they move on to doing something else. Quite a few positions are filled by people who do their two years or whatever and do not plan of making it a career at all.