If you really work for an oil company, you will probably have your own aviation department.
The EC155 has performance problems in B and B1 form. The B1 is an improvement but not that much of one. The aircraft still has engine problems, 212 man will surely attest to the number of engine changes that have been done since Shell bought them a few years ago. Can't tell you who, but a senoir Shell Aviation person was recently heard to say that the 155 was the worst decision they had made.
The S76C+ also has engine issues because its a Turbomeca broadly similar to that in the 155. Howevr, its a well know aircraft with a good safety record and offrers good payload if you don't overload it with too much equipment.
The 139 has often been touted as the panacea to the medium helicopter market. BUT, its unproven and, being an oil company, you will need HUMS which isn't available until 2007 or 2008. If you can wait that long, you may be able to have a 76D.
My vote overall would go to a S76C+ or C++ which has just been released.
Hippo
