Many companies do drills that serve various purposes. All such companies that do drilling will have to take drilling licenses and permits that allow them to carry the drilling operations at a specific time and for a defined period.
There are many reasons why a company would pursue drilling. Some are doing it for commercial purposes, while others are exploration drilling companies. Exploration drilling is to discover elements like coal, minerals, and valuables. Some companies will do such exploration to research these minerals, while others would use the finding for commercial selling. Since there is an on-going need for mining and exploration, the role of these companies remains one of the prominent aspects of drilling activities. There are businesses that also contract these drilling firms to cover some part of the exploration operations that come with the mining operational needs.