High-precision bailing type oil pumping unit for oil exploitation

The utility model particularly relates to a high-precision bailing type oil pumping unit for oil exploitation. The problems that an existing bailing type oil pumping unit is poor in oil pumping precision, prone to polluting the environment, poor in space utilization rate, large in potential safety hazard and serious in waste are solved. The pumping unit comprises a wellhead sealer and a pumping unit frame, a guide rail frame is arranged above the pumping unit frame; a pumping force sensor is arranged between the guide rail frame and the pumping unit frame; angle-steel-shaped limiting plates are fixed to the four corners of the oil pumping unit frame, two guide rails which are distributed front and back and placed left and right are arranged on the guide rail frame, an oil extraction trolley moving left and right along the guide rails is arranged on the guide rails, a winding drum and a speed reduction brake motor are arranged on the oil extraction trolley, and an output shaft of the speed reduction brake moto