Bohrloch-Zementierungszusammensetzungen und ihre Verwendung

Cement compositions for cementing a subterranean zone penetrated by a well bore, comprise Portland cement, 30% to 60% water, 1% to 30% aqueous colloidal silicic acid with particles 300 to 700 m /g, and 0.1% to 10% of a fluid loss additive which is a graft lignin or lignite polymer, an aqueous soluti...

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Bibliographische Detailangaben
Hauptverfasser:	SOLLAND, GEIR, N-4300 SANDNES, NO, OLAUSSEN, STEIN, N-4046 HAFRSFJORD, NO, BJORDAL, AUDUN, DK-6710 ESBJERG, DK
Format:	Patent
Sprache:	ger
Schlagworte:	ADHESIVES ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE DYES LIME, MAGNESIA MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS POLISHES REFRACTORIES SLAG TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	Cement compositions for cementing a subterranean zone penetrated by a well bore, comprise Portland cement, 30% to 60% water, 1% to 30% aqueous colloidal silicic acid with particles 300 to 700 m /g, and 0.1% to 10% of a fluid loss additive which is a graft lignin or lignite polymer, an aqueous solution of the reaction product of polyethyleneimine and a sulfonated organic compound or a copolymer of AMPS and N,N-dimethylacrylamide, the percentages being by weight of the dry cement.