Drilling fluid comprising a vinyl neodecanoate polymer and method for enhanced suspension
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United States of America Patent
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Aug 11, 2009
Grant Date -
Mar 4, 2004
app pub date -
Sep 5, 2003
filing date -
Dec 29, 2000
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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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