Case Study Frac Sleeve Protects Xmas Tree During Frac Campaign PRODUCT: XMAS TREE FRAC SLEEVE Project: A major oil and gas operator undertook a hydraulic fracturing campaign to unlock further reserves from a reservoir with declining production in the northern North Sea. The xmas trees on the low producing wells were not sufficiently rated to withstand the hydraulic frac pressures planned for the operation. Unity designed and manufactured xmas tree Frac Sleeves that would allow the existing xmas trees to withstand the high pressures exerted on them during the campaign. Solution 1: • Each xmas tree Frac Sleeve comprised a spool with the relevant bottom connection to suit the respective xmas tree and an internal hanger/sleeve assembly that sealed in the seal bore of the

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