The Casing patching technology usually is not adequate to long intervals and high temperature wells, and it is not easy to operate and easy to enlarge well radius.

• 针对常规补贴套管技术无法满足长井段、高井温的要求以及施工工艺复杂、工序多、修复后井眼内径变化较大的问题,提出了膨胀管补贴套管技术。