A continuous length of small diameter (i.e., usually 1″ to 1-3/4”) ductile steel tubing which is coiled onto a reel. The tubing is fed into the well by an injector head through a coiled tubing blow-out preventer or stufñng box. The coiled tubing may be used for pumping fluids, including cement, into the wellbore.
Source: API BULLETIN E3, Environmental Guidance Document: Well Abandonment and Inactive Well Practices for U.S. Exploration and Production Operations, First Edition, January 1993 (Reaffirmed June 2000). Global Standards
Intervention using continuous tubing.
Source: NORSOK D-002, Well intervention equipment, Rev. 2, June 2013. Global Standards