Earth boring – well treating – and oil field chemistry – Well treating – Contains inorganic component other than water or clay
Reexamination Certificate
2011-01-25
2011-01-25
Kugel, Timothy J. (Department: 1796)
Earth boring, well treating, and oil field chemistry
Well treating
Contains inorganic component other than water or clay
C507S271000, C507S272000, C507S276000, C166S305100
Reexamination Certificate
active
07875575
ABSTRACT:
Viscoelastic surfactant (VES) based fluid systems for zone isolation and flow control are effective in water and/or gas shutoff applications. The fluid systems may include brine, a viscosity enhancer, as well as the VES, and optionally a stabilizer for high temperature applications. The stabilizer may be an alkali earth metal oxide, alkali earth metal hydroxide, alkali metal oxide, alkali metal hydroxide, Al2O3, and mixtures thereof. The viscosity enhancer may include pyroelectric particles, piezoelectric particles, and mixtures thereof. The fluid system is easy to pump into the formation, and after pumping, the fluid system will generate very high viscosities to prevent the VES fluid from flowing back to stop undesirable water and/or gas production.
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Crews James B.
Huang Tianping
Willingham John R.
Baker Hughes Incorporated
Kugel Timothy J.
Li Aiqun
Mossman Kumar & Tyler PC
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