Composite coiled tubing apparatus and methods

A composite coiled tubing that resists buckling within the wellbore comprising a substantially cylindrical hollow tube having a reel end proximate a coiled tubing reel and a distal end adapted for insertion into a wellbore, comprising:

• a surface layer;
• a cylindrical composite fiber layer, wherein the composite fiber layer is concentrically inside of the surface layer, the composite fiber layer formed by weaving composite fiber in a predetermined pattern whereby the fibers may be oriented in angular relationship to the longitudinal direction of the coiled tubing such as to provide appropriate strength and buckling characteristics to the coiled tubing, the fibers being oriented such that the modulus strength of the composite coiled tubing is dependent upon the orientation of the woven fibers, wherein the angle formed by the fiber as compared to the longitudinal direction of the coiled tubing is variable along the length of the coiled tubing;
• a cylindrical liner layer concentrically inside the composite fiber layer, said cylindrical liner layer being capable of providing chemical resistance to abrasive fluids, wherein conductive fibers are provided within the composite coiled tubing, the fibers being adapted to transmit signals representing data, the fibers being adapted to receive data along their length at specific location(s) along the composite coiled tubing;
• a composite disconnect on the distal end of the composite coiled tubing, said disconnect having a plurality of fibers of varying strength and orientations mixed into a fiber blend, wherein the load range at which the composite disconnect fails corresponds to the failure characteristics of the fiber blend, the fiber blend having a predetermined failure limit and providing an indication of failure upon loss of signals in said fibers;
• at least one magnetic node recognizable by a detector, wherein passage of the magnetic node near said detector may be used as a data point to determine depth of the composite tubing within the wellbore;
• the composite coiled tubing adapted to resist buckling within the wellbore.