Yes the oil service industry is in a decline.
Does this mean no work - not quite
Once your schooling is done.
Talk with your counselor. Grab a list of companies and head on down. Phone calls will not do. Show your face at the office and ask if any position is available. if you get a no, wear them down by visiting weekly. Keep your nose clean, dress appropriately, be enthusiastic (do not woo them with your school knowledge). AND for godsake be nice but not flirty with the girls in the front office. They run the show LOL. If your lucky "they" will be in need of a redhat to fill a job. Even luckier they can put you to work in the shop. Learning the trade means understanding how a company operates, no better way than being a shop rat who wants to learn. Keep an open mind, fitting in is important, just, dont be a kiss-ass.
You are in for a rude awakening. Schools prepare you for the knowledge of diving. On the job training prepares you for the lifestyle.
best of luck meeting your goal.