Hydraulic directional drilling, punching and protecting integrated system and method for low-permeability coal seam

The invention discloses a hydraulic directional drilling, punching and protecting integrated system and method for a low-permeability coal seam. The hydraulic directional drilling, punching and protecting integrated system comprises an open-close directional drill bit, a hollow screw motor short section, a hydraulic punching control short section, a hollow non-magnetic short section, a hollow measuring short section, a hollow cable non-magnetic short section and a hollow cable drill rod short section. The hydraulic punching control short section comprises a rear connector, a control pipe with a central through hole and a front connector; the front end of the control pipe is provided with a first end cover capable of conducting insertion fit limiting on the front connector, and the front end of the interior of the front connector is provided with a first limiting cavity capable of being in insertion fit with the fixing section. A plurality of first overflowing holes are formed in the side wall of the front par