The use of continuous coiled tubing to perform various types of remedial treatments or workovers has been well documented.1,2,3,4 Numerous successful treatments have been obtained with this device in oil, gas, injection and geothermal wells. However, the occurrence of and, more importantly, the causes of failures in operations involving coiled tubing have not been addressed by the industry. An examination of causes of failure should lead to a higher success ratio.
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