The direct-drive top drive is a new type of top drive integrated with electromechanical technology in the design. It adopts permanent magnets synchronous alternating frequency Motors to drive the main shaft directly without Gear Box, which shortens the transmission chain. Besides, it has symmetrical and compact structure, shorter main cable and control cable, realizing more efficiency in the installation and lower fault rate. Compared to asynchronous Motors, the high-efficiency, low-consumption, low-speed and large-torque permanent magnet direct drive, has an energy consumption reduced by 20 to 30%; it adopts an embedded liquid cooling system, reducing the volume of the cooling system and has low noise; one-button operation is achieved in terms of the drilling speed, lifting ring rotation angle, release of counter torque, etc.; advanced control technologies such as torsional pendulum resistance reduction and soft torque are integrated to suppress PDC bit drilling stick-slip; and it can perform a pre-failure analysis on key components based on the comprehensive use time and efficacy through sensor signal collection, thereby prompting inspection or replacement thereof.
