Oil prodn. machine with hydraulic transmission screw stem pump

The utility model relates to an oil production machine with a hydraulic transmission screw pump, which relates to a device for crude oil transportation and oil production of oilfields. The utility model is designed mainly for solving the problems of long transmission shafts, large torsion and large power consumption of the existing cantilever type and the single screw oil pumping machine, and large volume of an electric submersible pump, expensive electrical cables, etc. The utility model mainly comprises a motor, an oil pump, an oil tank, a pressure regulating valve, a high pressure valve, a pressure gauge, a power oil inlet pipe, an oil hydraulic motor, an oil return pipe, a screw, a pump casing, an oil conveying pipe, etc. The utility model has the advantages of low cost, small power consumption and high efficiency of oil production, and is suitable for oil production of wide fluid viscosity, large silt concentration and deep well oil production. The screw of the utility model can rotate reversely, and can be washed by utilizing high pressure oil or clear water injection.