Personally, if I were going offshore to work I'd take the following books:
- GPSA Engineering Data Book
- Campbell's Gas Conditioning & Processing Volume 1 (The Basic Principles)
- Campbell's Gas Conditioning & Processing Volume 2 (The Equipment Modules).
- Trouvay & Cauvin's Piping Equipment Handbook
Between them, they cover most things you'll encounter.
Unfortunately, I don't know of any references that cover the utilities (drains, air, etcetera). However, a good reference that describes the flare system and issues relating to it can be found in:
- The Institute of Petroleum Guideline for the Safe and Optimum Design of Hydrocarbon Pressure Relief and Blowdown Systems.
Hope these help you in some way.