Pumpable Geopolymers Comprising A Setting Accelerator
AssigneeSchlumberger Technology Corporation
InventorsElena Pershikova, Olivier Porcherie, Slaheddine Kefi, Yamina Boubeguira, Hafida Achtal
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Abstract
The invention concerns the use of a carbohydrate-based compound as a setting accelerator in a pumpable geopolymeric suspension for oil and/or gas industry applications, said suspension further comprising ‘an aluminosilicate source, a carrier fluid, and an activator, and methods of preparing such suspensions. In particular, the suspension according to the invention is used for well primary cementing operations and/or remedial applications.
Claims20
Method of using of a carbohydrate-based compound as a setting accelerator in a pumpable geopolymeric suspension, in particular, for oil or gas industry applications or both, said suspension further comprising an aluminosilicate source, a carrier fluid, and an activator.
A method of preparing and placing a pumpable geopolymeric suspension into a borehole, the suspension comprising an aluminosilicate source, a carrier fluid, an activator and a carbohydrate-based compound as a setting accelerator, comprising a first step comprising either (i) predissolving the carbohydrate-based compound in the carrier fluid or (i′) blending the carbohydrate-based compound with the aluminosilicate source.
A method of preparing and placing a pumpable geopolymeric suspension into a borehole, the suspension comprising an aluminosilicate source, a carrier fluid, an activator and a carbohydrate-based compound as a setting accelerator, comprising a first step comprising either (i) predissolving the carbohydrate-based compound in the carrier fluid or (i′) blending the carbohydrate-based compound with the aluminosilicate source;
- wherein the carbohydrate-based compound is a saccharide, a saccharide derivative or a salt thereof and is present in the suspension at a concentration less than 15% by weight of aluminosilicate.
Dependencies are inferred from the claim text.