the present invention relates to a cable for supplying chemicals to , and for the control of , a sub - sea hydrocarbon well comprising an external pressure pipe enclosing a number of smaller pipes , the cable having the special features that the external enclosing pipe forms a channel for the hydration inhibiting agent and in addition forms an element that takes up mechanical tension in the cable , protects the internal pipes against radial forces and forms a nearly corrosion free environment protecting the smaller , internal pipes .