Efficient heat removal device for medium-deep layer underground heat exchange

The efficient heat removal device comprises an inner pipe, the inner pipe comprises a heat preservation pipe, a reinforcing pipe, a filter pipe and a balance weight pipe, the heat preservation pipe is sequentially provided with a lining layer, a heat preservation layer and a protection layer from inside to outside, the reinforcing pipe is sequentially provided with a lining layer, a reinforcing layer, a heat preservation layer and a protection layer from inside to outside, and the filter pipe is provided with a filter screen. The counterweight pipe is sequentially provided with a lining layer, a reinforcing layer, a counterweight layer and a protective layer from inside to outside. According to the heat-preservation and heat-preservation device, by arranging the heat-preservation layer and the enhancement layer which are made of different materials, the heat-preservation capacity of the inner pipe is improved, the situation that hot water makes contact with cold water to cause heat loss when moving upwards is