The oil industry is facing current and future challenges to reduce costs; shrinking margins are resulting in enlarged financial pressures for all parties involved. A quantum change in technology for exploitation and maintenance of brown fields is required. Conventional techniques are reaching their limits;learning curves are flat. New, steeper learning curves typical for application of new technology are needed. The emerging coiled-tubing (CT) drilling has this potential. A comprehensive reeled system could result once integration of essential contributing technologies, as yet insufficient, is achieved.