Saturday 1 July 2023 - Publications
For those specific wells, a repair program was set up. First of all, it was necessary to check that the remaining thickness of the surface casing was still acceptable considering the maximum operating pressure. For that purpose, a part of the guide tube was cut to inspect the external surface of the surface casing that was degraded. It was cut until a depth at which degradations were not visible anymore. The casing was then sand blasted and inspected with ultrasonic probes to collect some thickness references and with a 3D scanning laser to get the whole external profile.