The Application of cut-and-thread fishing and Annular Negative Pressure Unblocking Technology in Coiled Tubing Stuck Accidents
The phenomenon of stuck coiled tubing often occurs during operation.In cases where conventional treatment measures are ineffective,the use of cut-and-thread fishing and annular under pressure unblocking processes are two more effective treatment measures.By drawing inspiration from the method of fishing cables through the core and the advantages of snubbing operation,a rotating blowout prevention sealing device has been developed to solve the sealing and circulation problems of the annular space of the cut-and-thread tube and the coiled tubing.Using a combined cut-and-thread fishing string,it was smoothly run into 4007.99m and successfully released.In response to the problem of sand sticking in coiled tubing,the annular negative pressure unblocking process was adopted to achieve successful unblocking of coiled tubing.Through two cases,it further enriches the methods for releasing stuck coiled tubing and has reference value for handling similar problems.
coiled tubingstuckcut-and-thread fishingannular under pressure unblocking processes
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NSTL
万方数据
维普
