Coiled tubing with a secured conduit and a method for manufacturing same. A slickline held by a retainer is introduced to the coiled tubing manufacturing process by attaching the retainer and slickline to a metal plate, prior to the metal plate being welded into a tubular. The slickline is unaffected by the welding and heat treatment process or processes. To install the conduit into the coiled tubing, the coiled tubing is unrolled from the reel, the conduit is attached to an end of the slickline and the other end of the slickline pulled to fish the conduit through the coiled tubing, resulting in conduit held within the retainer inside the coiled tubing. In embodiments where a slickline is not used, the conduit can be pumped into the retainer or dropped therein by gravity when the coiled tubing is hung in a wellbore. Alternatively, a heat resistant conduit may be secured within the coiled tubing by attachment directly to the coiled tubing or held therein by a retainer.