Prismatic drill rod refers to prismatic tapered drill pipe used for coal tunnel exploration, also called triangular drill pipe, anti sloughing hole drill pipe, ABS pipe. With prismatic steel pipe as rod body and thread or hex or square joint as connection type, it is manufactured by the friction welding craft. Prismatic drill rod pipe is widely used in the coal seam and similar geological conditions for coal mine water exploration and gas drainage borehole construction, and can also be used in anchorage and drilling in the field of geophysical prospecting and construction of water conservancy engineering.