Downhole tool for radial drilling of high-temperature well and radial drilling operation system and method

The invention discloses a downhole tool for radial drilling of a high-temperature well and a radial drilling operation system and method. According to the method, a connector, a hanger, an oil pipe, a rotary joint, an anchor, a guider, a metal pipe and a nozzle are included; wherein the connector, the hanger, the oil pipe, the rotary joint, the anchor and the guider are connected in sequence; one end of the connector is connected with the coiled tubing, and the other end is connected with the hanger; one end of the metal pipe is connected with the hanger, and the other end of the metal pipe is connected with the nozzle, sequentially penetrates through the oil pipe, the rotary joint and the anchor and extends into the guider, so that after the anchor is anchored, the nozzle connected with the metal pipe extends out in the guiding direction of the guider under the driving of the continuous pipe and sprays abrasive jet flow for radial drilling. The problems that a high-temperature underground spraying pipe is pr