Middle-deep layer large-aperture concentric heat exchange structure

The utility model provides a middle-deep layer large-aperture concentric type heat exchange structure which comprises a heat exchange inner pipe and a heat exchange outer pipe, an annular heat exchange space is formed between the heat exchange inner pipe and the heat exchange outer pipe, the lower portion of the heat exchange inner pipe is suspended, and the bottom of the heat exchange inner pipe and the bottom of the heat exchange outer pipe are heat exchange medium circulation channels. The heat exchange outer pipe is formed by connecting a soil sleeve, a production sleeve and a semi-sealing bridge type water filter pipe, and the heat exchange inner pipe is in threaded connection with a seamless steel pipe through a heat preservation and insulation oil pipe; a pump chamber section is arranged on the upper portion of the heat exchange inner pipe and internally provided with a deep-well pump connected with a pump pipe. According to the utility model, the structural form of the middle-deep layer heat exchanger