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.

Keywords:
corrosion inhibition, gas lift mandrel, circulation rate, workover operation, friction loss, jointed pipe, consideration, wash fluid, production enhancement, downhole intervention
Subjects:
Hydraulic Fracturing, Production Chemistry, Metallurgy and Biology, Improved and Enhanced Recovery, Health, Noise, chemicals, and other workplace hazards, Completion Installation and Operations, Well Intervention, Coiled tubing operations, Corrosion inhibition and management (including H2S and CO2)
Copyright 1982, Society of Petroleum Engineers of AIME
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