There are long hours and early mornings regularly. Days off are iffy - depending on where you are and what the market is like you may not get any. Fifty hour stretches of non-stop work are not unheard of, and one hundred hour weeks can be expected. If you have researched working at Schlumberger even a little bit, you know that it is not a 9-5 job. Take that statement to heart. But there is a certain pride that comes from working the hours that are required, but this can be easily overlooked in the moment of exhaustion.
The company is gigantic, and there are rules and checklists for every single step in a job. The job of Field Engineer means ensuring that these policies are fully followed. It can be a huge amount of work in a busy district that is short on people (most all of them).
The US oilfield is significantly different than the rest of the world, but the company operates roughly the same everywhere. This has its benefits, but largely makes working in the US more cumbersome as the staffing levels in the US are much lower than everywhere else. An engineer fills in the gaps - sometimes working as a hand, a mechanic, an accountant, and a manager all in one day.
If you are not mechanically minded, a job in the field will probably be largely baffling. Every job uses extremely complicated tools and machinery, and understanding the operation of all of it is necessary.
