Layered double hydroxides for oil-based drilling fluids
AssigneesSaudi Arabian Oil Company, Durham University, M-I Drilling Fluids UK Limited
InventorsMusarrat Halima Mohammed, Andrew Whiting, Hugh Christopher Greenwell, Manohara Gudiyor Veerabhadrappa, John Adrian Hall, Gasan Selman Alabedi, Michael Hayward Hodder
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Abstract
A drilling fluid and a method of preparing the drilling fluid. The oil-based drilling fluid includes a base oil continuous phase comprising a base oil, an aqueous dispersed phase and at least one rheology modifier. The at least one rheology modifier includes a magnesium/aluminum (Mg/Al) layered-double hydroxide (LDH) diamondoid compound.
Claims20
An oil-based drilling fluid comprising:
- a base oil continuous phase comprising a base oil;
- an aqueous dispersed phase;
- and
- at least one rheology modifier comprising a magnesium/aluminum (Mg/Al) layered-double hydroxide (LDH) diamondoid compound.
A method for preparing an oil-based drilling fluid, the method comprising:
- mixing a base oil, optionally an emulsifier, and optionally a wetting agent to form a first mixture;
- and
- mixing an aqueous dispersed phase and at least one rheology modifier into the first mixture to form an oil-based drilling fluid, the at least one rheology modifier comprising a layered-double hydroxide magnesium/aluminum-diamondoid compound.
A method for drilling in a subterranean well, the method comprising:
- operating a drill in a wellbore in the presence of an oil-based drilling fluid comprising:
- a base oil;
- at least one additive chosen from an emulsifier, a weighting material, a fluid-loss additive, a viscosifiers, or an alkali compound;
- and
- from 0.1 wt. % to 1 wt. %, based on the total weight of the drilling fluid, of a magnesium/aluminum adamantane layered double hydroxide compound.
Dependencies are inferred from the claim text.