Transocean's a drilling contractor, own alot of rigs and drill for operators. Just merged with GSF. Long time ago, they merged with Sedco-Forex (used to be owned by SLB).
It's hard to compare since they are essentially different jobs from what BHI & SLB offer (if you exclude SLB's IPM), but a driller job (internationoal) pays really well in transocean, but I would say it's more of a hands-on work. But you get regular rotations, if irregular you get overtime.
Typically the training program (from what I heard) involves a rotation of all the work on the rig where you have to work your way up, from a roustabout to roughneck/derrickman to driller, then toolpusher and eventually an OIM/rig manager.
and powdersnow, DCS does more interpretation work (geoscientists, petrophysicists, etc) while SIS does more of the IT stuff SLB has. WesternGeco's our seismic side (exploring seas, deserts for oil/gas).
thanks again zeusu... well explained.... hmm... then i will apply it as well... coz that's all i need for a head start...