Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
James Michael Foley0
David Dino0
Date of Patent
August 2, 2011
0Patent Application Number
115212510
Date Filed
September 14, 2006
0Patent Primary Examiner
Patent abstract
An aqueous drilling fluid which contains a diquaternary ammonium cation functionalized clay which provides a substantially constant rheological profile, with respect to salinity, when incorporated into well drilling fluids. A clay/organic chemical composition includes: (a) montmorillonite clay and (b) one or more diquaternary ammonium compounds. A further aspect of the invention is a well drilling process which employs a drilling fluid containing the diquaternary ammonium cation functionalized clay described hereafter.
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