Earth boring – well treating – and oil field chemistry – Well treating – Contains intended gaseous phase at entry into wellbore
Reexamination Certificate
2006-01-31
2006-01-31
Tucker, Philip C. (Department: 1712)
Earth boring, well treating, and oil field chemistry
Well treating
Contains intended gaseous phase at entry into wellbore
C507S211000, C507S217000, C166S309000
Reexamination Certificate
active
06992048
ABSTRACT:
The present invention relates to methods of generating gas in and foaming well treating fluids during pumping of the treating fluids or after the treating fluids are placed in a subterranean zone, or both. A method of the present invention provides a method of making a foamed well fluid that comprises a gas comprising the steps of combining an aqueous fluid, a surfactant, an encapsulated activator, and a gas generating chemical, the gas generating chemical being present in an amount in the range of from about 0.1% to 100% of a water component in the aqueous well fluid; and allowing the gas generating chemical and the encapsulated activator to react so that gas is generated in the aqueous fluid to form a foamed well fluid. Methods of cementing, fracturing, cementing compositions, fracturing fluid compositions, and foamed well fluid compositions also are provided.
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Paper entitled “Specification for Materials And Testing for Well Cements” by American Petroleum Institute, dated Jul. 1990.
Luke Karen
Morgan Rickey L.
Ravi Krishna M.
Baker & Botts L.L.P.
Tucker Philip C.
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