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Methods for maintaining zonal isolation in a subterranean well
A cement for use in wells in which hydrogen sulfide is present, comprises polymer particles. In the event of cement-matrix failure, or bonding failure between the cement/casing interface or the cement/borehole-wall interface, the polymer particles swell when contacted by hydrogen sulfide. The swelling seals voids in the cement matrix, or along the bonding interfaces, thereby restoring zonal isolation.
Methods for maintaining zonal isolation in a subterranean well
A cement for use in wells in which hydrogen sulfide is present, comprises polymer particles. In the event of cement-matrix failure, or bonding failure between the cement/casing interface or the cement/borehole-wall interface, the polymer particles swell when contacted by hydrogen sulfide. The swelling seals voids in the cement matrix, or along the bonding interfaces, thereby restoring zonal isolation.
Methods for maintaining zonal isolation in a subterranean well
BULTE-LOYER HELENE (author) / REGNAULT DE LA MOTHE LOIC (author)
2019-11-12
Patent
Electronic Resource
English
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