Unity Executes Thru-Tubing Well Isolation Operation in Italy
A specialized inflatable cement retainer achieved barrier isolation after standard remedial cementing operations encountered downhole losses.
Well integrity and engineering services specialist Unity has completed an intervention campaign in Italy, securing isolation on a technically challenging well using customized downhole hardware.
The deployment was undertaken after standard remediation practices proved unsuccessful at the site. Previous conventional cement squeeze operations had failed to establish an effective seal due to the presence of a persistent thief zone located behind the well's slotted liner.
To counter the downhole fluid losses and achieve effective shut-off, Unity introduced a bespoke thru-tubing inflatable cement retainer. The engineered assembly allowed the team to convey and set the isolation barrier directly through the existing tubing string.
The successful installation resolved the subsurface integrity issue, underscoring the application of specialized thru-tubing mechanical barriers in wells where geological and mechanical conditions preclude standard cement placement.
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