Use of scleroglucan as high temperature additive for well cements

Process for cementing oil wells, gas wells or geothermal wells, according to which a suitable drilling fluid is injected under appropriate conditions, optionally followed by a buffer fluid and, finally, a composition comprising water, a cement, at least one viscosifying additive, optionally at least...

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Bibliographische Detailangaben
Hauptverfasser:	LECOURTIER, JACQUELINE, RIVEREAU, ALAIN, CARTALOS, ULYSSE
Format:	Patent
Sprache:	eng
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:	Process for cementing oil wells, gas wells or geothermal wells, according to which a suitable drilling fluid is injected under appropriate conditions, optionally followed by a buffer fluid and, finally, a composition comprising water, a cement, at least one viscosifying additive, optionally at least one retardant compound and optionally at least one silica, characterised in that the said additive is a scleroglucan solution. The invention applies especially to the cementation of wells at high temperature.