Wells – Processes – Chemical inter-reaction of two or more introduced materials
Patent
1993-07-27
1994-12-20
Suchfield, George A.
Wells
Processes
Chemical inter-reaction of two or more introduced materials
166308, E21B 4326
Patent
active
053739019
ABSTRACT:
The present invention relates to a method of breaking an aqueous fracturing fluid comprising introducing said aqueous fracturing fluid into contact with an encapsulated breaker said encapsulated breaker comprising an aqueous fluid soluble breaker for said fracturing fluid encapsulated within a membrane comprising a partially hydrolyzed acrylic crosslinked with either an aziridine prepolymer or a carbodiimide, said membrane having imperfections through which an aqueous fluid can diffuse, such that an aqueous fluid in said fracturing fluid can diffuse through said membrane, dissolve at least a portion of said breaker and diffuse outward from said encapsulated breaker to contact and break the fracturing fluid in contact therewith.
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Paper No. CIM/SPE 90-89 "Encapsulated Breaker For Aqueous Polymeric Fluids" M. King et al presented Jun. 10-13, 1990 in Calgary.
Laramay Steve B.
Norman Lewis R.
Halliburton Company
Kent Robert A.
Suchfield George A.
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