Logos designed for Department of Petroleum Engineering

Well, the yarn and tale about the designing of the logos above are not necessary to discuss here =P You people are wise enough to understand my emotion which I have used. Of course, there's a mini hilarious story about it. I can't mention here as that person had promised me not to disclose the secret =D ...But seriously, I availed the offer alot... While uploading, there's a non-ending contagious smile spread on my face with a devilish essence =D
Hope you like the logos, I could create better logos but that person wanted the simplest =S I added stylish and brisk as additive in the logos =P