Pros
Pay is good, especially if you are International, you have no bills. Schlumberger provides everything. The industry sees the training program with Schlumberger as one of the best in the business. Great opportunities to move elsewhere once you gain experience.
Cons
You have no life! Expected to work 30 days offshore, 4 days on 'days off' that become days of working in the office. You might get some time off here and there, but you have no schedule and dont' know when these days off will come, so you can't make plans, ever. The one time i made plans and tickets for a vacation, it was cancelled due to 'business need'. Offshore on a rig, 98% of the staff have an equal 4 or 2 weeks on and 4 or 2 weeks off. While the Service hands from SLB, HAL, BHI, etc seem to be working non-stop. It sucks to see someone else making almost as much $$ as you, and work only 6 months out of the year.