This invention provides an integrated drilling, flushing, and protection dual-channel drilling tool, comprising a centrally openable and closable
drill bit, a dual-channel hydraulic flushing device, a dual-channel
drill rod, and a dual-channel
water supply device, connected sequentially from front to back. After drilling is completed, this invention eliminates the need to lift the
drill bit or change the drilling tool; the screen
pipe can be directly lowered into the central flow channel of the dual-channel drilling tool for borehole protection operations. This drilling tool has two independent flow channels, combining normal drilling, high-pressure hydraulic flushing, and full-hole screen
pipe lowering for protection without lifting the
drill bit. Different work tasks can be performed by connecting the
water pipe to different interfaces on the dual-channel
water supply device. This invention expands the application range of drilling tools, reduces the labor intensity of workers, improves drilling efficiency, and provides technical equipment support for underground gas drainage drilling in
coal mines.