Earth boring – well treating – and oil field chemistry – Well treating – Contains enzyme or living micro-organism
Patent
1997-03-07
2000-08-29
Tucker, Philip
Earth boring, well treating, and oil field chemistry
Well treating
Contains enzyme or living micro-organism
507101, 507921, 435 42, 435104, 166246, 166300, 166308, C09K 702, C12P 3900, E21B 4322
Patent
active
061108758
ABSTRACT:
Xanthan molecules are degraded using an xanthanase enzyme complex that is stable at temperatures above 250.degree. F., such as those temperatures found in some wellbores and process streams. The xanthanase enzyme complex is produced by a novel soil bacterium. The xanthanase enzyme complex may be used to remove xanthan based formation damage, such as drilling filter-cakes and filtrates, or to remove xanthan based filter-cakes and/or residues present in processing equipment. The xanthanase enzyme complex may also be used to reduce the viscosity of xanthan-containing fluids, such as hydraulic fracturing fluids, blocking gels, drilling muds, and process fluids. The xanthanase enzyme complex may also be used in conjunction with other well or process treatments, such as stimulations and cementing operations, to improve the effectiveness of these treatments.
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Carr Michelle Alana
Tjon-Joe-Pin Robert M.
Yang Bing
BJ Services Company
Tucker Philip
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