EXPANDABLE TUBULARS FOR USE IN A WELLBORE

摘要

The present invention generally relates to methods and systems for mitigati ng trouble zones in a wellbore in a preferred pressure condition and completing the wellbore in the preferred pressure condition. In one aspect, a method of reinforcing a wellbore is provided. The method includes locating a valve member within the wellbore for opening and closing the wellbore. The method further includes establishi ng a preferred pressure condition within the wellbore and closing the valve membe r. The method also includes locating a tubular string having an expandable portion in the wellbore and opening the valve member. Additionally, the method includes moving the expandable portion through the opened valve member and expanding the expandable portion in the wellbore at a location below the valve member. In another aspect, a method of forming a wellbore is provided. In yet another aspect, a system fo r drilling a wellbore is provided.