C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 23/26 (2006.01) C08K 5/00 (2006.01) C09K 8/512 (2006.01) E21B 43/22 (2006.01)
Patent
CA 2091489
A gelable composition and process are disclosed that delay the gelation and increase the gel strength of gelled water soluble acrylamida-containing polymers contains: (1) a water dispersible first crosslinking compound selected from the group consisting of p-aminosalicylic acid, furfuryl alcohol, RArOC(O)R' and HOArC(O)OR" wherein Ar represents a phenyl group which can be substituted or non-substituted; R is a hydrogen or a carboxylic group; R' is a C1-C6 alkyl; R" is a hydrogen, a phenyl group, or a C1-C6 alkyl; and when R is a carboxylic group, R and C(O)OR" can be at ortho, mete, or pare position with respect to the OC(O)R' group and the OH group, respectively; (2) a water dispersible second crosslinking compound selected from the group consisting of aldehydes and aldehyde-generating compounds; (3) a water soluble acrylamide-containing polymer; and (4) water.
Osler Hoskin & Harcourt Llp
Phillips Petroleum Company
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