Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Reexamination Certificate
2011-04-12
2011-04-12
Figueroa, John J (Department: 1765)
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
C507S241000, C507S244000, C507S255000, C507S256000, C507S267000, C507S268000, C507S271000, C166S305100, C166S308200
Reexamination Certificate
active
07923417
ABSTRACT:
A composition for treating a portion of a wellbore or a portion of a subterranean formation is provided, the composition comprising: (a) water; (b) a source of hydrogen peroxide, and (c) an activator for the source of hydrogen peroxide; wherein the pH of the composition is adjusted to be within an appropriate range for the type of activator. A method for treating a portion of a wellbore or a portion of a subterranean formation, the method comprising the steps of: forming or providing a composition comprising: (a) water; (b) a source of hydrogen peroxide, and (c) an activator for the source of hydrogen peroxide; wherein the pH of the composition is adjusted within an appropriate range for the type of activator; and introducing the composition through a wellbore to treat a portion of a wellbore or a portion of a subterranean formation. The activator can be a water-soluble alkanoyl-donor compound or a chelated transition metal. Preferably, the composition further comprises an iron chelating agent. The composition and method are adapted for breaking a viscosity increasing polymer, such as xanthan. The method has particular applications where the static temperature of the portion of the wellbore or the portion of the subterranean formation to be treated is less than 100° F. (38° C.).
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Foo Fong Fong
Mundy Jeffrey L.
Saini Rajesh K.
Sanders Michael W.
Booth Albanesi & Schroeder LLC
Figueroa John J
Halliburton Energy Service,s Inc.
Kent Robert A.
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