ZONAL ISOLATION TDK-CS-SS1-0318 ©2018 Tendeka. All rights reserved. www.tendeka.com Swellstack sealing system successfully restores production and maintains well integrity for global operator in the North Sea. North Sea, UK Tendeka was asked to provide a more robust sealing solution for a dual bore 4.625”/4.562” Surface Control Sub-Surface Safety Valve (SCSSSV). Damage and corrosion had caused the safety valve to fail, therefore leading to the well having to be shut in. It was essential to find a solution to avoid the need for an expensive workover, which would have involved pulling the completion to replace the entire system. The Challenge The operator initially managed to regain production over a 6-month period by installing Tendeka’s swellable O-ring system. Over this time,

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