Case Study Repair NGL Storage Cavern Saves ~14% More ID Challenge A Corrosion across the entire 1,100 ft. of 7 in. casing installed in a natural gas liquids (NGL) storage cavern risked NGL leakage into the surrounding formation. Mitigating potential leakage with a 5-1/2 in. standard liner would restrict the NGL flow annulus and constrain flow rates into and out of the cavern, making repair unattractive. But the alternative was drilling a new wellbore and an unacceptable delay of 2-3 years to solution mine a new cavern. Added Value With an ESealTM casing repair option that maximized NGL system throughput, the operator was able to continue operation of the existing facility. In doing so, the ESeal expandable system allowed them to avoid the costs of drilling and

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