TECHNOLOGY Coiled tubing facilitates deep underbalanced workover

Larry S. Adams Chevron USA Production Co. Midland, Tex. Charles C. Overstreet CUDD Pressure Control Inc. Houston Coiled tubing is being run into the well to drill out scale A recent workover shows the technical capability and cost effectiveness of coiled tubing for cleaning out scale in a 22,611-ft, low pressure, high-temperature gas well. The well, operated by Chevron USA Production Co., is in the Fort Stockton Gas Unit 5-1 Gomez (Ellenburger) field, in West Texas. The development of reliable 100,000-psi minimal yield strength coiled tubing was a major factor that allowed this work to succeed. The methods demonstrated by this workover are becoming a ...

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