First off all thanks for your fast reply, and second you got the idea, your description of the design is what I was thinking of (a shield with the map and a ribbon banner in the bottom like is embracing the shield)
my idea of a Oilfield is a Drilling Rig, or a off-shore platform, I put a Picture, and something I forgot to mention is that I am planing on embroider the crest on the jersey.
this is the graph for a Drilling Rig
And and oilfield pump could work too.
Thanks For Your help,
Regards