Device and method for conducting underground-ground information transmission through radio frequency technology

The invention discloses a device and method for conducting underground-ground information transmission through the radio frequency technology and belongs to the field of oil-gas well engineering. Thedevice for conducting underground-ground information transmission comprises a casing pipe descending into a preset position in an oil-gas well, and permanent magnet spheres and rubber hollow stoppersare input into the casing pipe in sequence. A diameter-variable centralizer is fixed to the outer face of the casing pipe, and a binding hoop is arranged in the middle portion in the diameter-variablecentralizer. A ring-column-shaped space is formed between the casing pipe and the wall of the oil-gas well, and well drilling liquid is contained in the ring-column-shaped space. A high-temperature-resisting radio frequency electronic tag is loaded in each rubber hollow stopper. High-temperature-resisting sensors and high-temperature-resisting underground readers are arranged on the binding hoop.The high-temperature-resist