First-ever application
Isealate Springblade Patch
Minimal effect on tubing ID
4.62 mm
Rapid remediation
Back on production within 24 hours
Client satisfaction
100%
This case story represents a groundbreaking intervention in a European onshore gas producer, where a shallow leak had developed in the 3-½” (9.3 ppf) tubing, just below the Tubing-Retrievable Surface Valve (TRSV), resulting in tubing to A-annulus communication.
The operator needed a solution that was capable of restoring well integrity, and production. Well conditions included a maximum pressure of 1,885 psi, and a maximum temperature of 86°F (30°C).
The proposed solution from Welltec® led to the first-ever installation of an Isealate Springblade Patch, a unique downhole repair solution utilizing a pre-rolled laminate steel sheet to remediate leaking or damaged tubing, but with minimal effect to/on the inner diameter (ID). In this case, the tubing ID of 2.992” could not be reduced any further than 2.75” to match the TRSV ID.
Pre
The requirements for the Isealate Springblade Patch included a collapse pressure of 100 bar, and a burst pressure 180 bar. During careful planning and job preparation, a prior clean-out run was deemed unnecessary, which on other occasions may facilitate flush contact between the patch and the tubing ID around the leak.
During
Running in hole with a 2.68” setting tool, the pre-rolled laminate metal sheet was deployed, held under tension by shear clamps. Once positioned across the leaking section, the activation process was initiated to break the shear clamps and set the patch, with sealing supported by a heat-activated resin.
Post
A subsequent pressure test at 180 bar confirmed the integrity of the repair and that the tubing could hold the designated pressure without any further leaks.
A successful drift run with a 2.75” tool confirmed that a minimal and reduction in/to the tubing ID had been achieved. Furthermore, a multi-finger caliper log confirmed an ID of 2.81”, verifying only a 4.62 mm reduction.
Following the first-ever deployment of an Isealate Springblade Patch, the well was set back on production and full functionality just 24 hours later, without any complications.
Tubing to A-annulus communication was resolved with only a 4.62 mm reduction to the tubing ID, gaining 100% satisfaction from the client.
Since this first European operation on behalf of an international oil & gas company, multiple Isealate Springblade Patches have been set globally.
