In recent years, well intervention operations have become more challenging due to the complex well completions and harsh formation conditions. This is particularly true for coiled tubing (CT) operations for one of the most complex development projects in the northern Caspian basin. Excessive abrasion acting on CT pipe has been encountered during CT operations in chrome completions in an H2S environment and this has resulted in a shortened CT service life.

The inability to predict the end of CT pipe service life could result in unexpected failures, which can cause the operator and service company down time, loss of well control, overall potential injury for personnel, and environmental harm.

This paper describes the shortfalls of the conventional CT pipe management techniques, which are largely based on assumed mathematical models and local practices, and how to reverse this trend by implementing the use of the non-contact technology of a magnetic flux leakage (MFL) measurement device with real-time inspection and monitoring of the CT pipe integrity.

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