Method and composition for breaking crosslinked gels

Details Method and composition for breaking crosslinked gels Method and composition for breaking crosslinked gels

1993-12-30

1995-02-28

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523130, 523131, 524404, 524409, 524423, 524437, 166280, 166295, C08K 515, C08K 338, C08L 500, E21B 4326

Patent

active

053938100

ABSTRACT:
Compositions and methods are provided which provide improved viscosity reduction of crosslinked hydratable polymer treating fluids in the presence of uncured resin-coated proppants. The uncured resins are generally uncured phenolic or furan resins. The breaker comprises an oxidizing agent to which is added a sequestering agent comprising a copolymer of vinylpyrrolidone and acrylic acid to sequester at least a portion of any phenolic extracts from said resin that may be present in said treating fluid from contact with the uncured resin.

REFERENCES:
patent: 3929191 (1975-12-01), Graham et al.
patent: 4829100 (1989-05-01), Murphey et al.
SPE 20640 "Application Of Curable Resin-Coated Proppants" L. R. Norman, J. M. Terracina, M. A. McCabe and P. D. Nguyen, Halliburton Services. Copyright 1990, and presented at the 65th Annual Technical Conference & Exhibition held in New Orleans, La. on Sep. 23-26, 1990.

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