Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Patent
1994-03-30
1995-03-21
Geist, Gary
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
507903, 507222, 507224, 507225, 507227, 507228, 507229, 166270, 166295, 523130, E21B 33138
Patent
active
053992695
ABSTRACT:
A gelable composition and process are disclosed that delay the gelation and increase the gel strength of gelled water soluble acrylamide-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 C.sub.1 -C.sub.6 alkyl; R" is a hydrogen, a phenyl group, or a C.sub.1 -C.sub.6 alkyl; and when R is a carboxylic group, R and C(O)OR" can be at ortho, meta, or para 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.
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Geist Gary
Phillips Petroleum Company
Shay Lucas K.
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