RE: Commencement of Well Re-entry Operations on TLP-103CST11 Sep 2019 16:32
Primarily used during completion or well intervention, a plug is required to isolate a part of the wellbore from another part; for instance, when a job is carried out on the upper section of the well, the lower part of the wellbore must be isolated and plugged, i.e. zonal isolation in a well.