The length and size of DTH Drill Pipe are distinguished. Generally speaking, drill pipes are divided into 0.8 meters, 1 meter, 1.5 meters, 2 meters, etc. according to the length. According to the size of the drill rod, it can be divided into 50, 60 and 89 drill rods. The 50 drill rod is generally suitable for the torque below 1900, and it is more practical for drilling soft coal seams, soil rocks and sand. Generally, drill pipes of ordinary materials such as DZ40 and DZ50 have short service life and are not enough to withstand the high pressure and high impact force generated during the drilling process. Therefore, we must choose geological drill pipes with good materials when buying.
How to choose the length of geological drill pipe
The current mainstream length of geological drill pipes is generally 1 meter. The main advantages are as follows: easy to handle, easy to count, easy to operate in narrow tunnels, very suitable for multi-directional and multi-angle drilling, and can effectively avoid vertical holes and upward holes It is convenient to unscrew and unload the drill pipe when drilling. Therefore, the current mainstream drilling rigs such as ZDY1250S, ZDY1900S, ZDY3200S, ZDY4000 and other tunnel drilling rigs and conventional vertical shaft drilling rigs generally use 1m geological drill pipes to drill with a travel rule, which is suitable for multiple projects. Repeated use
 
1.5m geological Top Hammer Drilling Tools introduction
The 1.5m drill pipe is mainly suitable for large-stroke drilling rigs. The main advantage is that the captain is easy to operate, but it cannot be used on short-stroke and regular-stroke drilling rigs. It cannot be unscrewed and unscrewed in narrow tunnels and when drilling rig vertical holes and overhead holes. At the same time, it is very unfavorable for footage counting, and is generally only suitable for use in a single project.
 
To sum up, generally we are purchasing a mainstream drill pipe with a length of 1 meter as the first choice.