Very nice! i like the sub sea or underground drilling optical..........can you make the tagline larger and more oceanic or aqua colors? maybe some wave effect to the text?
Here is the update : Bigger symbol : #59 #62 and #63 Different layout : #60 #61 Let me know what do you think about? If any revision don't hesitate to tell me, I will update my designs as soon as possible.
I am submit designs with different font, layout and colour : #149 #150 #151 With simple illustrations and the strength of the brand, make tremendous strength. Although stand-alone logo will be easily recognizable.