US 12,286,860 B2
Downhole seal and method of setting a downhole seal
Walter Stam, Aalsmeer (NL); Evert Jonathan Van Den Ham, Wijk en Aalburg (NL); Timotheus Kees Theodorus Wolterbeek, Haarlem (NL); and Erik Kerst Cornelissen, Haarlem (NL)
Assigned to RUMA PRODUCTS B.V., (NL)
Appl. No. 18/017,545
Filed by Ruma Products B.V., Hoogeveen (NL)
PCT Filed Jul. 22, 2021, PCT No. PCT/EP2021/070572
§ 371(c)(1), (2) Date Jan. 23, 2023,
PCT Pub. No. WO2022/018219, PCT Pub. Date Jan. 27, 2022.
Claims priority of application No. 20187698 (EP), filed on Jul. 24, 2020; and application No. 21182354 (EP), filed on Jun. 29, 2021.
Prior Publication US 2023/0265736 A1, Aug. 24, 2023
Int. Cl. E21B 33/12 (2006.01)
CPC E21B 33/1208 (2013.01) 16 Claims
OG exemplary drawing
 
1. A downhole seal, comprising:
a CO2 swellable elastomer which swells when in contact with CO2, wherein the CO2 swellable elastomer comprises a salt that is hydroscopic and soluble in water.