Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Reexamination Certificate
2011-08-30
2011-08-30
Figueroa, John J (Department: 1765)
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
C507S212000, C507S219000, C507S244000, C507S246000, C507S255000, C507S259000, C507S260000, C507S261000, C507S267000, C166S305100, C166S306000
Reexamination Certificate
active
08008235
ABSTRACT:
The present invention provides drilling fluids that comprise a base fluid and a water-soluble relative permeability modifier. In addition, the present invention provides methods of reducing the permeability of a subterranean formation to aqueous-based fluids during the drilling phase that comprises providing a water-soluble relative permeability modifier; and placing the water-soluble relative permeability modifier into the subterranean formation during the drilling phase. The present invention provides methods of drilling a well bore in a subterranean formation comprising providing a drilling fluid that comprises a base fluid and a water-soluble relative permeability modifier, and placing the drilling fluid in the subterranean formation. The water-soluble relative permeability modifiers of the present invention generally may comprise hydrophilically modified polymers, hydrophobically modified polymers, or water-soluble polymers without hydrophobic or hydrophilic modification.
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Dalrymple Eldon D.
Eoff Larry S.
Reddy B. Raghava
Figueroa John J
Halliburton Energy Service,s Inc.
Kent Robert A.
McDermott Will & Emery LLP
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