Emulsion in blast furnace slag mud solidification
AssigneeShell Oil Company
InventorKenneth M. Cowan
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Abstract
A cementitious slurry is prepared from drilling fluid, blast furnace slag and an emulsion comprising an oil external phase and an aqueous internal phase having therein a additive for said cementitious slurry. In a preferred embodiment the additive is an accelerator for the blast furnace slag such as sodium hydroxide. This allows mixing the additive with the drilling fluid and blast furnace slag without immediate contact between the additive and the other ingredients. After the cementitious slurry has been mixed and pumped into position in a wellbore, the emulsion breaks and the additives are released.
Claims15
A process for preparing an emulsion-containing cementitious slurry comprising:
- preparing an emulsion having an oil external phase and aqueous internal phase, said internal phase comprising water and an additive for said cementitious slurry;
- and
- combining said emulsion with blast furnace slag and an aqueous drilling fluid.
A cementitious slurry comprising:
- drilling fluid;
- blast furnace slag and an emulsion having an oil external phase and an aqueous internal phase, said aqueous internal phase comprising water and an additive for said cementitious slurry.
Dependencies are inferred from the claim text.