After Lamadian Oilfield turning into super high water-cut stage, the research on pipeline property in super high water-cut stage and the field tests of unheated gathering were developed, which can resolve the problems appearing in the course of unheated gathering step by step, and make the relevant matching technique perfectly little by littlie. The unheated gathering technique already has been applied in the whole oilfield on a large scale, which obtained nice gas saving effect. To the new problems found in the process of unheated gathering and the continuous deep imagination of unheated gathering, the field tests were carried out, including adjusting and controlling water blended quantity of single well, the research on new type oil remover, chemical agent at low temperature and mobile well-cleanout setting. During the course of test research, the new knowledge is acquired, which has some guiding meaning for further completing the unheated gathering technique.