Submitted some new entries with different colours and drilling element, and try to add checkmark to see your company is consulting and based on Top Three Things to Communicate through your Logo.
#65 is very good, I would remove the blue drop. Keep playing with the themes you have, and maybe start trying to add a compass. Keep up the great work!
#91 looks nice, can we try a different, more modern Derrick design with a brighter green? Also keep up the great work with other creative designs! Thanks.