If you are so interested in this topic, I can tell you about core drilling rigs. Core drilling rigs are mainly used for diamond and carbide exploration and hard mineral drilling, and can also be used for drilling in engineering geology and underwater exploration, as well as for mine tunnel ventilation and drainage. The structure is simple and compact, reasonable layout, lightweight, convenient disassembly and reasonable speed range. You can learn more about these units from the guys at
erde-tools.com. They will tell you everything in detail and maybe you will even think about ordering one.
