www.drillingmanual.com/coiled... - Coiled Tubing (CT) is a continuous length of small-diameter pipe spooled onto a reel in the same way as wire or cable is wrapped on a drum. The coiled tubing operation permits the technique of “snubbing” a continuous length of tubing in and out of a live well through a stripper BOP arrangement. The main advantage of Coiled Tubing is that it can be run into producing wells against high wellhead pressures (e.g. 345 bar / 34,500 kPa or 5000 psi), and down past the perforations, without production interruption or killing the well. The most common pipe size in use is 1.5″ through to 2.875″, although larger sizes are available and used. Read Full article Now