Abstract: The device relates to an installation comprising a cavity extending from the surface of the ground and provided with at least one electrically conductive tubular element. The device comprises a single-strand smooth cable for supporting an action and/or measurement assembly, which cable is electrically conductive and has a breaking strength greater than 300 daN, and is disposed in the tubular element. The surface of the cable is electrically insulated at least in part from said tubular element. The device includes transmitter means and receiver means for transmitting and receiving an electrical and/or electromagnetic signal, said means being situated in the vicinity of the surface and in the cavity, and being electrically connected to the cable and to the tubular element and/or an underground formation. The invention is applicable to transmitting information and to controlling tools in an oil well.

Abstract: The device relates to an installation comprising a cavity (13) extending from the surface of the ground (17) and provided with at least one electrically conductive tubular element (21; 25). The device comprises a single-strand smooth cable (3) for supporting an action and/or measurement assembly (5), which cable is electrically conductive and has a breaking strength greater than 300 daN, and is disposed in the tubular element (21; 25). The surface of the cable (3) is electrically insulated at least in part from said tubular element (21; 25). The device includes transmitter means (9, 11) and receiver means (9, 11) for transmitting and receiving an electrical and/or electromagnetic signal, said means being situated in the vicinity of the surface (17) and in the cavity (13), and being electrically connected firstly to the cable (3) and secondly to the tubular element (21; 25) and/or to the formation (19). The invention is applicable to transmitting information and to controlling tools in an oil well.