Ultra-short radius radial well-drilling tool system

The invention relates to an ultra-short radius radial well-drilling tool system used for well drilling and completion operations in oil production and comprising a sleeve perforating system and a high-pressure ejection system. The ultra-short radius radial well-drilling tool system comprises a lifting joint, an elbow joint, an upper joint, a rotating joint, a thrust ball bearing, a single-row centripetal ball bearing, a base, a central tube, a sucker rod, an oil pipe, a screw rod, a high-pressure hose, an upper fixed joint, an upper joint of a universal joint, a rail groove, a universal joint, a shaft pin, a cruciform joint, a drill plate, a drilling tool joint, a drilling tool, a lower joint, a high-pressure nozzle and a locating anchor. The high-pressure ejection system comprises a ground high-pressure pump, the sucker rod, the high-pressure hose, the rail groove and the locating anchor. Firstly, the sleeve perforating system is used for drilling a hole with the diameter being not less than 25 mm in the wall of a sleeve at the design depth of an oil well; a pipe post of the sucker rod and a perforating cutter are brought out, connected with the high-pressure ejection system and taken into the well; and the high-pressure hose takes the high-pressure nozzle into the hole through the rail groove for high-pressure ejection. The well drilling system solves the problem that old wells increase oil draining area, and can be widely applied to oil well drilling and completion operations.