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US 10,894,909 B2Granted
Inducibly degradable polyacetal compositions for use in subterranean formations
AssigneeShell Oil Company
InventorsRobert Lawrence Blackbourn, Paul Richard Weider, Jonathan Joseph Brege, Allen Dale Gabrysch, Ryan Matthew Van Zanten
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Abstract
Inducibly degradable compositions comprising polyacetal and associated methods and systems.
Claims24
A method comprising:
- placing a sand control screen in a wellbore penetrating a subterranean formation, the sand control screen comprising an inducibly degradable composition comprising polyacetal;
- and
- activating an autocatalytic degradation of the polyacetal, the activating comprising contacting the sand screen with an inducer to form an alpha hydroxy sulfonic acid, the inducer comprising at least one of a sulfur dioxide and a sulfur dioxide precursor, wherein the inducer further comprises at least one of a strong acid, a halide, and a brine.
A method comprising:
- inducing an autocatalytic degradation of an inducibly degradable composition comprising polyacetal, wherein the inducing is performed in a wellbore that penetrates a subterranean earth formation and the inducibly degradable composition is a solid,
- wherein inducing degradation comprises contacting the inducibly degradable composition with an inducer to form an alpha hydroxy sulfonic acid, the inducer comprising at least one of a sulfur dioxide and a sulfur dioxide precursor, wherein the inducer further comprises at least one of a strong acid, a halide, and a brine.
Dependencies are inferred from the claim text.