Patent ID: 7588076
Filing Date: 2009-09-15
Classification: E21B

Abstract:
1. A pumping and repairing unit, comprising: an electrical control cabinet, a main frame, a supporting platform, a motor, an electrically operated brake, a coupling, a speed reducer, an oil pumping polished rod, a rope suspension device for the oil pumping polished rod, an oil pumping polished rod rope, a balance weight case, a balance weight rope hanging device, a balance weight rope, a protection rope, a protection rope catching device, and a driving device; wherein the supporting platform is disposed on the main frame; the motor is coupled with the speed reducer through the electrically operated brake and the coupling; the speed reducer is coupled with the driving device; the oil pumping polished rod rope has an end connected with the oil pumping polished rod through the rope suspension device and another end fixed to the driving device; the balance weight rope has an end connected with a balance weight rope hanging device disposed at the balance weight case, and another end fixed to the driving device; the protection rope has an end connected with the balance weight rope hanging device, and another end which is fixed to the driving device after passing through the protection rope catching device disposed at the supporting platform; a driving and braking device comprises the driving device and a brake wheel disposed at an end of the driving device; a fixed pulley block disposed at the supporting platform; a workover rope fixed to the driving and braking device, and having another end which fixed to the supporting platform after winding around the fixed pulley block and a movable pulley block; a hanging connector connected to a lower end of the movable pulley block; a braking handle disposed at a bottom of the main frame; and the brake wheel controlled by the braking handle through a lever.