The objective of the workover operations was to remove the existing damaged completion strings.
The most challenging string was the 7 x 7 5/8″, in which setting and retrieving plugs took more time than expected due to debris in the casing. On the other hand, the string was stuck in the cavern; thus, several attempts to cut the string were required before it was successfully retrieved.
Then the new dual concentric completion was installed that allows simultaneous injection and production operations in the well. This was accomplished by running the 7” injection string; in particular, with a sacrificial drill-in BHA, followed by installing / drilling-in the 5” x 3 ½” production string and finally installing the 2 ⅞” dilution string.
The project was finished with zero HSE-related non-conformities.