Systems and methods for heating a wellbore environment comprise one or more electric heating cables are attached to an elongated support member, such as a wire rope, so that the support member receives and relieves the heating cables of a mechanical load. The attachment may be with two-piece clamps spaced at regular intervals along the support member. The heating cables and support member may be disposed in coiled tubing within the wellbore. The coiled tubing can be pressure-sealed and filled with a dielectric fluid. The heating cables and support member can be attached to a cable hang-off having a plurality of wedge-shaped slips that cooperate with a bowl to form a pinching member that grips the support member and suspends the support member and heating cables in the wellbore. The methods include methods for manufacturing and installing the heating apparatus.
