Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Reexamination Certificate
2011-08-30
2011-08-30
Kugel, Timothy J. (Department: 1761)
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
C507S239000, C507S240000, C507S241000, C507S245000, C507S252000, C507S253000, C507S254000, C507S255000, C507S256000, C507S257000, C507S258000, C507S260000, C507S262000, C507S269000, C507S271000, C166S268000, C166S270100
Reexamination Certificate
active
08008236
ABSTRACT:
Many methods are provided including a method comprising: providing a surfactant gel having a first viscosity that comprises an aqueous base fluid and a surfactant; providing an ortho ester breaker; contacting the surfactant gel with the ortho ester breaker; allowing the ortho ester breaker to hydrolyze to produce an acid and an alcohol; and allowing the acid and/or the alcohol to interact with the surfactant gel so as to reduce the first viscosity of the surfactant gel to a second viscosity. Other methods are provided that include a method comprising: providing a surfactant gel that comprises an aqueous base fluid and a surfactant having a first viscosity; placing the surfactant gel into a subterranean formation; providing an ortho ester breaker; contacting the breaker with the surfactant gel; allowing the breaker to hydrolyze to produce an acid and an alcohol; and allowing the acid and/or the alcohol to interact with the surfactant gel so as to reduce the first viscosity of the surfactant gel to a second viscosity.
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Admasu Atnaf
Halliburton Energy Service,s Inc.
Kent Robert A.
Kugel Timothy J.
McDermott Will & Emery LLP
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