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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Main Author | |
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Format | Patent |
Language | English German |
Published |
26.08.1976
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Subjects | |
Online Access | Get full text |
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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. |
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Bibliography: | Application Number: DE19752506459 |