Surfactant compositions for well cleaning
AssigneeSchlumberger Technology Corporation
InventorsFrederik Nilsson, Sylwia Komocki
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Abstract
A surfactant composition for use in well treatment, particularly for removing oil-based mud deposits from a well prior to cementing, comprises an alkylpolyglucoside in a solution of a mutual solvent for water and hydrocarbon. The composition can be used to formulate a chemical wash by dissolving the composition at a concentration of about 1%-10% (e.g. 5%) by weight in water or brine.
Claims11
A method of well treatment comprising the step of circulating a well treatment solution through a well before placement of a cement slurry therein, wherein the well treatment solution comprises a surfactant composition comprising at least one linear or branched chain C6-C10 alkylpolyglucoside in a solution of a mutual solvent selected from the group consisting of isopropyl myristate and rapeseed methyl ester.
Dependencies are inferred from the claim text.