Patent ID: 9714560
Date: 2017-07-25
CPC Classifications: C09K,E21B

Claim:
1. A method comprising: providing a treatment fluid comprising a base fluid, a protected scale inhibitor, and at least one selected from the group consisting of (1) a metal crosslinker and a gelling agent, (2) an amine-based resin curing agent and an epoxy-based composition, and (3) any combination thereof, wherein the protected scale inhibitor is a scale inhibitor with at least one chelating group functionalized with a protecting group selected from the group consisting of an enzymatically cleavable ester, a substituted methyl ester, a 2-substituted ethyl ester, a 2,6-dialkylphenyl ester, a benzyl ester, a substituted benzyl ester, a silyl ester, an amide, a hydrazine, a stannyl ester, an alkyl phosphate, a 2-substituted ethyl phosphate, a haloethyl phosphate, a benzyl phosphate, a phenyl phosphate, and an amidate; and introducing the treatment fluid into a wellbore penetrating a subterranean formation; hydrolyzing the protected scale inhibitor to produce the scale inhibitor; and inhibiting scale formation in the wellbore, the subterranean formation, or both with the scale inhibitor, wherein more than 50% of the chelating groups of the protected scale inhibitor are protected.