Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Reexamination Certificate
2011-07-05
2011-07-05
Kugel, Timothy J. (Department: 1765)
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
C507S235000, C507S203000, C516S021000, C516S024000, C516S028000
Reexamination Certificate
active
07972996
ABSTRACT:
Phosphate esters useful for gelling hydrocarbons in combination with a metal source are disclosed along with methods of preparation of the phosphate esters. Fouling in oil refinery towers has been attributed due to distillation of impurities present in phosphate esters used to gel hydrocarbons for oil well fracturing. The improved method of preparation of the phosphate ester results in a product that substantially reduces or eliminates volatile phosphorus, which is phosphorus impurities that distill up to 250° C., and increases the high temperature viscosity of the hydrocarbon gels formed using the phosphate esters.
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Ghesner Ioan
Horton David P.
Bennett Jones LLP
Brine-Add Fluids Ltd
Kugel Timothy J.
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