Geothermal well sand prevention device

The utility model discloses a geothermal well sand prevention device which comprises a telescopic sand prevention water filter pipe, a sand discharging hopper is fixedly installed at the lower end of the telescopic sand prevention water filter pipe, a splicing insertion pipe is fixedly installed on the inner side of the sand discharging hopper, and a splicing outer frame is fixedly installed at the upper end of the telescopic sand prevention water filter pipe. A limiting opening is formed in the position, located at the upper end, of the outer side of the splicing outer frame, and the telescopic sand-prevention water filtering pipe comprises a metal pipe, an annular groove, a water filtering through hole, an inner fixing ring, a short connecting piece and a filtering soft net. According to the geothermal well sand prevention device, the structure is firmer through the telescopic sand prevention water filter pipe, the telescopic sand prevention water filter pipe can be bent to adapt to a bent well wall, second