BRIDGEFORM system stabilized shale, saving operator $7 million USD
BRIDGEFORM system stabilized shale, saving operator $7 million USD
2 PagesBRIDGEFORM system stabilized shale, saving operator $7 million USD Challenges • Case and cement 12 1/4 in. x 13 in. section • Unstable formation resulting in cavings, tight hole, and packoffs • Problems pulling bottomhole assembly out of hole Results • Drilled, cased, and cemented two troublesome wells in the 12 1/4 in. x 13 in. shale section • Approximately $7 million USD savings in rig time and mud costs An operator planned to drill a 12 1/4 in. x 13-in. section through the troublesome Hordaland shale in the Norwegian sector of the North Sea. Unstable clay present in the Hordaland can result in tight hole when tripping, pack- off tendencies, and the potential for stuck pipe. The main wellbore was drilled to 8,973 ft (2735 m) total depth usi
