The spindle device adopts the split or integral elastic structure drum, which has uniform force and high strength; the assembled brake disc is convenient for transportation and installation; the second generation disc brake has more reasonable structure, better sealing and smaller internal resistance; the new generation hydraulic station has advanced technology, with delay secondary braking performance and can be automatically released at the wellhead; the double drum hoist is equipped with radial gear block hydraulic system The transmission part can be equipped with planetary reducer or parallel shaft arc gear reducer. Tkdg or tkdg-plc or tkdg-bp (variable frequency speed regulation) complete system can be used for supporting electric control. The power brake is set as an independent unit for users to choose.