Abstract: In line with fluid accumulation in gas wells in Sulige Gas Field, the Jianghan Machinery Research Institute and Oil & Gas Research Institute of Changqing Oilfield jointly carried out the research work on small diameter pipe hanging + intelligent injection agent, and successfully performed the work of hanging 3 300 m of small diameter pipe, intelligent injection agent and pulling out of hole under pressure. The success of this test provides a new way for experimental study on drainage gas recovery by long-term or intermittent injection of foaming agent in small diameter pipe and for increasing the production of gas wells；this has also accumulated experiences in pulling coiled tubing out of hole under pressure.