Direct-drive type electric top drive for well drilling

• Main Authors: ZHANG XIANDE, HOU RUIFANG, ZHANG XINFENG, LIU HONGWEI
• Format: Patent
• Language: Chinese; English
• Published: 22.09.2020
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; ELECTRICITY; FIXED CONSTRUCTIONS; GENERATION; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention discloses a direct-drive type electric top drive for well drilling, and relates to the field of top drive devices of petroleum drilling technologies. The electric top drive comprises anupper box, a motor, a spindle and a bearing box, wherein the upper portion of the motor is connected with the upper box, the lower portion of the motor is connected with the bearing box, and a motor rotor is connected to the spindle; a lifting ring is arranged on the upper portion of the upper box, a disc brake assembly is arranged in the upper box, and a brake disc of the disc brake assembly is connected to the spindle through a taper sleeve; and the upper box is connected with the bearing box through bearing stand columns at the four corners of the motor, a load bearing is arranged on the upper portion in the bearing box and connected to the spindle, and a thrust bearing is arranged at the lower end of the load bearing and connected to the spindle. Compared with the prior art, the electric top drive has the adva