Nano viscosity reducing and anti-sand device

The utility model relates to a mill micron viscosity reduction and sand-proof device for viscosity reduction and sand-proof of a thick oil well, which comprises a base tube. Outside screws are arranged on ends of the base tube, and holes with limited round stages are even distributed. Filter materials of metal wire or short wire formed by extrusion are filled in the holes, and the technology main points are that a filter screen layer and a block positioning layer with holes are arranged on the outside filter materials, wherein, the block positioning layer is hinged on the edge between the holes and the outer wall. Ferro-boron magnetic bodies are correspondingly arranged on the inner wall of the base tube, thereby the viscosity of crude oil is reduced, in particular to the oil-sand separation of the thick oil. No chemical thinner is increased, and the production of the oil well and the oil outlet are improved. The utility model has the advantages that structure is reasonable, filter effect is good, service life is long, clogging is not easy, and applicable field is wide.