Electric drilling tool suitable for ocean underwater drilling rig

An electric drilling tool for an ocean underwater drilling rig, comprising:

• a power supply assembly, having a power distribution cabinet, a power supply cable, and a cable plug;
• a motor assembly, having a connecting joint, an upper machine head, a motor housing, a stator assembly, a rotor assembly, stabilizing bearings, a thrust bearing, a rotating shaft, a lower machine head and a protector;
• a bit assembly, having a transition joint and a bit;
• wherein the motor assembly has a hollow structure vertically penetrating through the motor assembly, which has an upper end connected with a coiled tubing through the connecting joint and a lower end connected with the bit through the transition joint;
• wherein one end of the power supply cable is connected with the power distribution cabinet, and another end of the power supply cable passes through the coiled tubing and is connected with the upper machine head through the cable plug;
• wherein the stator assembly comprises a stator iron core, stator copper core segments, and stator windings;
• wherein the stator iron core and the stator copper core segments both have stator slots formed into closed slots;
• and
• wherein the stator windings are wound and fixed in the closed slots of the stator iron core and the stator copper core segments.