Abstract: The reel comprises a core and two identical end plates fitted in and assembled on the core. It is characterized in that each one-piece end plate (2) has a cylindrical support (6) on its inside face, which support fits into the core (1), and a reserve housing (20) in its outside face, which housing communicates with the periphery of the core, and in that the core has an inside bevelled surface (5) of limited angle (b) on each of its ends Application: packaging optical fibers or electrical conductors.

Abstract: A cable for prospecting, said cable including a core of conductor wires (3) surrounded by insulating material (4) and by armour (7, 8) formed by at least one layer of helically wound steel wires. It includes, from its center to its periphery, inside the armour, an axial monofilament (2) made of a polymer that withstands high temperatures, said monofilament forming the insulation of an inner conductor (1), an outer conductor (5) and a sheath (6) made of a thermoplastic substance that withstands high temperatures, said inner conductor serving a different electrical function than said core of conductor wires.