Stabilising salt-contg drilling muds - by adding maleic or fumaric acids or maleic anhydride, to retain thixotropic properties

A fresh water drilling mud, contaminated with NaCl and/or KCl, contains 1.43-17.16, esp. 2.86-11.44 kg/cu. m of an ethylenedicarboxylic acid and/or anhydride to stabilise its rheological properties. The additive is esp. maleic acid and/or maleic anhydride, or fumaric acid. Used in drilling for oil,...

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Bibliographic Details
Main Author OSCAR WALKER,THAD
Format Patent
LanguageEnglish
German
Published 26.08.1976
Subjects
ADHESIVES
CHEMISTRY
DYES
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
POLISHES
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Summary:A fresh water drilling mud, contaminated with NaCl and/or KCl, contains 1.43-17.16, esp. 2.86-11.44 kg/cu. m of an ethylenedicarboxylic acid and/or anhydride to stabilise its rheological properties. The additive is esp. maleic acid and/or maleic anhydride, or fumaric acid. Used in drilling for oil, gas, brine and water, where the borehole is drilled through formation which contaminate the mud with NaCl and/or KCl. The additive maintains the dispersibility and thixotropic props. of the mud.
Bibliography:Application Number: DE19752506459