Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
Reexamination Certificate
2003-09-05
2009-08-11
Kugel, Timothy J. (Department: 1796)
Earth boring, well treating, and oil field chemistry
Earth boring
Contains organic component
C507S118000, C507S925000
Reexamination Certificate
active
07572755
ABSTRACT:
An efficient oil based drilling fluid is provided that includes a polymer additive effective at imparting suspension characteristics without the presence of organophilic clays, while also providing filtration control. The fluid is shear thinning and has good fluid rheology over a broad temperature range. A preferred polymer for the additive is substantially linear and comprises mostly hydrophobic monomers and some hydrophilic monomers such as, for example, an emulsion copolymer of 2-ethylhexyl acrylate and acrylic acid.
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Kirsner Jeff
Miller Jeff
Halliburton Energy Service,s Inc.
Kugel Timothy J.
Roddy Craig W.
Tripp Karen B.
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