Oil Well Drilling for Android is a free idle digging game. You’ll love this app if you’re looking for a fun way to pass the time. The aim of this free game is to search for oil and manage your own dig business. This app doesn’t feature award-winning graphics, but it’s an idle game that will keep you digging for more. The best idle games are casual, easy to understand, and attention-grabbing. This title is all three in one compact package.