A new non-contact CT assessment system was placed in service in 2010, measuring wall thickness, diameter, ovality, and detecting imperfections in the wall of ferromagnetic steel tubing.
The unit is capable of assessing both new tubing for compliance with API 5ST (Specification for Coiled Tubing)1 supplementary requirement SR37, and also in-service tubing for erosion, corrosion and other imperfection conditions. The unit has the advantage of being able to assess the effect of flaws on tubing life via the Flexor programme.
A review of results obtained with the new tool when used to assess both new and used CT will be presented. Knowledge of the condition of the tubing at all stages of its life should be of great importance to owners of tubing when deciding upon future tubing use.