https://www.wolframalpha.com/input?i=Yates+Drill+Field+vs+Haql+ar+Rawdatayn
Yates Drill Field vs Haql ar Rawdatayn - Wolfram|Alpha
drill fieldyatesvshaqlar
https://www.sintef.no/en/publications/publication/0198cc7a6134-be8fc650-93b7-4937-b2df-7f69d25c3c61/
Wear of cemented tungsten carbide percussive drill?bit inserts: Laboratory and field study - SINTEF