VERWENDUNG VON QUELLFAEHIGEN, SYNTHETISCHEN SCHICHTSILIKATEN IN WAESSRIGEN BOHRSPUEL- UND BOHRLOCHBEHANDLUNGSMITTELN

VERWENDUNG VON QUELLFAEHIGEN, SYNTHETISCHEN SCHICHTSILIKATEN IN WAESSRIGEN BOHRSPUEL- UND BOHRLOCHBEHANDLUNGSMITTELN

Synthetic swellable layer silicates corresponding to the following formula MgO.aMA.bAl2O3.cSiO2.nH2O (I) in which M is Na+ and Li+ having an Na:Li ratio of at least 1; A is F-, OH- or 1/2O2- or a mixture thereof; a is 0.1 to 0.6; b is 0 to 0.3; c is 1.2 to 1.7; and n is 0 to 3.0. are used in water-b...

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Bibliographische Detailangaben
Hauptverfasser: VON,RYBINSKI,WOLFGANG, DOLHAINE,HANS,DR, VON,TAPAVICZA,STEPHAN, MUELLER,HEINZ, WICHELHAUS,WINFRIED,DR, HEROLD,CLAUS-PETER,DR
Format: Patent
Sprache:ger
Schlagworte:
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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Zusammenfassung:Synthetic swellable layer silicates corresponding to the following formula MgO.aMA.bAl2O3.cSiO2.nH2O (I) in which M is Na+ and Li+ having an Na:Li ratio of at least 1; A is F-, OH- or 1/2O2- or a mixture thereof; a is 0.1 to 0.6; b is 0 to 0.3; c is 1.2 to 1.7; and n is 0 to 3.0. are used in water-based well-servicing fluids as a high-temperature-stable thixotrope substantially unaffected by alkaline earth metal ions.