Downhole transfer system

A downhole transfer system for transferring data through a well tubular metal structure arranged in a borehole of a well, comprising:

• a well tubular metal structure having an axial direction and being arranged in the borehole providing an annulus between the borehole and the well tubular metal structure,
• a transceiver assembly fixed to the well tubular metal structure, the transceiver assembly comprising:
• a tubular metal part mounted as part of the well tubular metal structure, the tubular metal part having an inner face, an outer face, and a wall,
• an assembly conductive winding made from a conductor connected with and positioned at the inner face and exposed to an interior of the well tubular metal structure, the conductor being configured to generate magnetic flux within the tubular metal part, and
• a power consuming device arranged in the annulus and connected the outer face, and the power consuming device being connected to the assembly conductive winding by means of an electrical conductor passing through the wall of the tubular metal part,
• a downhole tool comprises a tool body, a tool body outer face, and a tool conductive winding made from a tool body conductor configured to wirelessly receive a signal from the power consuming device due to proximity to the magnetic flux generated by the conductor of the assembly conductive wiring, the transceiver assembly being configured to remain fixed to the well tubular metal structure when the downhole tool is removed from the well,
• wherein the conductor of the assembly conductive winding has a cross-sectional shape having an axial extension along the axial direction and a radial extension perpendicular to the axial extension, the axial extension being at least 50% larger than the radial extension.