Wallis Drilling is one of the most experienced drilling companies in the industry. We’ve been working with the mining and exploration industries for 50 years, and have drilled in many remote and challenging locations. Invention and innovation has always been a big part of our company’s philosophy. Wallis developed the Air Core drilling system which is widely used throughout the world today. We constantly look for new ways to improve our equipment, operations and efficiency.
Source: this is an extract from the company’s own website