1. Structure and principle of drilling rig electrical system: Electricians need to know the structure of drilling rig electrical system and the functions of various parts, including main generator, transformer, cable, control cabinet, etc.
2. Debugging and maintenance of electric control system of drilling rig: Electricians need to learn debugging and maintenance techniques of electric control system of drilling rig, including troubleshooting, replacement of electrical components and maintenance of electrical system.
3. Electrical safety knowledge of drilling rig: Electricians need to know electrical safety knowledge of drilling rig, including safe use, maintenance and overhaul of electrical equipment, prevention and treatment of electrical accidents, etc.