某机施工-85℃斜鑽孔,在孔深304公尺处严重漏水、坍塌,需下套管处理,但因当时127与108公厘的套管均不足,故採用了異徑下套管的办法,(图1示)堵住了漏水与坍塌,使該井继续鑽进完成任务。 A machine construction -85 ℃ oblique borehole, hole depth of 304 meters at a serious water leakage, collapse, the need for casing treatment, but at that time 127 and 108 mm casing are not enough, so the use of a different diameter casing Approach, (Figure 1) to block the leakage and collapse, so that the well to continue drilling to complete the task.