Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Patent
1995-02-15
1997-02-18
Lovering, Richard D.
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
166300, 166308, 427213, 507214, 507921, 507922, C09K 300, E21B 4326, E21B 43267
Patent
active
056041861
ABSTRACT:
The present invention relates to a method of preparing an encapsulated enzyme breaker and method of use in treating a subterranean formation. An encapsulated breaker is prepared by coating an enzyme on a cellulose substrate. A micron-sized particulate is admixed with the enzyme solution to prevent undesired agglomeration of the substrate. The enzyme solution coated substrate is covered with a membrane comprising a partially hydrolyzed acrylic crosslinked with either an aziridine prepolymer or a carbodiimide. The membrane contains imperfections through which an aqueous fluid may pass into the breaker to contact the enzyme and diffuse the enzyme outward from the breaker particle.
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Carter Michael L.
Hunt Charles V.
Norman Lewis R.
Pelley Samuel D.
Powell Ronald J.
Halliburton Company
Kent Robert A.
Lovering Richard D.
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