Recently, Jiuli Lianyou, aiming at the problems of abnormal high pressure and string blockage in GD2-28X237 Oil Well after steam injection, collaborated with multiple units to formulate a plan. It adopted the technology of coiled tubing flushing and plugging removal without moving the string, solved the problem in only 6 hours and achieved intrinsic safety. In the follow-up, the technology will be further optimized to support the efficient development of the oil production plant