DEGRADING AND REMOVING CURED RESINS FROM SUBSTRATES
First Claim
Patent Images
1. A method comprising:
- introducing a chemical solvent into a wellbore penetrating a portion of a subterranean formation wherein a resin has been at least partially cured;
wherein the chemical solvent is selected from the group consisting of β
-lactam, γ
-lactam, δ
-lactam, and ε
-lactam, 2-pyrrolidone, N-methylpyrrolidone (NMP), 1,3-dimethyl-2-imidazolidinone (DMI), caprolactam, cyclohexanone, cyclopentanone, any combination thereof, and any derivative thereof;
contacting the resin with the chemical solvent to at least partially dissolve the resin; and
circulating a fluid in the wellbore to remove at least a portion of the resin from the wellbore.
1 Assignment
0 Petitions
Accused Products
Abstract
Methods are provided for chemically removing cured resin product from surfaces and subterranean formations in case of inappropriate consolidation, plugging of screens or tubing, and equipment damage. A chemical solvent is introduced to a wellbore where a resin has cured. The resin is contacted with the chemical solvent until the resin at least partially dissolves. At least a portion of the dissolved resin is then removed from the wellbore.
3 Citations
20 Claims
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1. A method comprising:
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introducing a chemical solvent into a wellbore penetrating a portion of a subterranean formation wherein a resin has been at least partially cured; wherein the chemical solvent is selected from the group consisting of β
-lactam, γ
-lactam, δ
-lactam, and ε
-lactam, 2-pyrrolidone, N-methylpyrrolidone (NMP), 1,3-dimethyl-2-imidazolidinone (DMI), caprolactam, cyclohexanone, cyclopentanone, any combination thereof, and any derivative thereof;contacting the resin with the chemical solvent to at least partially dissolve the resin; and circulating a fluid in the wellbore to remove at least a portion of the resin from the wellbore. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method comprising:
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introducing a chemical solvent into a wellbore penetrating a consolidated portion of a subterranean formation that has been at least partially consolidated with a resin; wherein the chemical solvent is selected from the group consisting of β
-lactam, γ
-lactam, δ
-lactam, and ε
-lactam, 2-pyrrolidone, N-methylpyrrolidone (NMP), 1,3-dimethyl-2-imidazolidinone (DMI), caprolactam, cyclohexanone, cyclopentanone, any combination thereof, and any derivative thereof;contacting the consolidated portion of the subterranean formation with the chemical solvent to at least partially unconsolidate the consolidated portion of the subterranean formation. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method comprising:
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introducing a chemical solvent into a subterranean formation containing a consolidated proppant pack; wherein the consolidated proppant pack comprises a plurality of proppant particles and a resin, and wherein the resin has at least partially consolidated the proppant pack; wherein the chemical solvent is selected from the group consisting of β
-lactam, γ
-lactam, δ
-lactam, and ε
-lactam, 2-pyrrolidone, N-methylpyrrolidone (NMP), 1,3-dimethyl-2-imidazolidinone (DMI), caprolactam, cyclohexanone, cyclopentanone, any combination thereof, and any derivative thereof; andcontacting the consolidated proppant pack with the chemical solvent to at least partially unconsolidate the consolidated proppant pack. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification