Wireless system for monitoring downhole parameters

A wireless system for monitoring downhole parameters in a well, wherein the well's walls are cased with a metal casing string, the system comprising:

• a transceiver mounted on a wellhead, the transceiver having one input and one output, wherein one of the input or output is connected to a metal structure of the wellhead and the other input or output is connected to a grounding device, and the transceiver being configured to receive or transmit a signal from or to a downhole instrument module;
• a downhole transceiver arrangement configured to be lowered into the well and comprising the downhole instrument module, a contact element for electrical contact with the casing string, wherein the contact element is installed under the downhole instrument module, downhole pumping equipment and tubing electrically isolated from the casing string using at least one centralizer made of dielectric material, and a packer located at the top of the downhole transceiver arrangement, configured to secure the downhole transceiver arrangement to the casing string:
• wherein the downhole instrument module comprises a dielectric insert, one or more measuring sensors, one or more actuators, a receiving and transmitting device, and is configured to receive or transmit a signal from or to the transceiver located on the wellhead.