Abstract: As a crucial equipment for well stimulation operation,coiled tubing is widely used in well completion and workover. Conventional operations primarily include acidizing for blockage removal,gas lift for flowback,and also incorporate sand washing,fishing,sliding sleeve manipulation,and plug retrieval operations. During a field operation at a specific well,coiled tubing equipment paired with hydraulic cutting tools was utilized to perform hydraulic cutting on the production tubing string,enabling adjustment of the production zone. This article briefly introduces the characteristics and technical applications of coiled tubing operations. By analyzing the limitations of conventional techniques under specific well conditions,the tool selection,operational challenges,technical advantages,and operational procedures of coiled tubing in hydraulic cutting operations are summarized to provide empirical basis for future applications of coiled tubing technology.

Key words: coiled tubing hydraulic cutting, cutting tool assembly, technical application