Epoxidized fatty acid methyl ester as low-shear rheology modifier for invert emulsion oil based mud
AssigneeSaudi Arabian Oil Company
InventorsJothibasu Ramasamy, Vikrant Wagle
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Abstract
An invert oil-based mud (OBM) may include an oleaginous continuous phase, an aqueous internal phase, an emulsifier; and a rheology modifier. The rheology modifier may include one or more of the group consisting of epoxidized methyl oleate, epoxidized methyl linoleate, and epoxidized methyl α-linolenate. The invert OBM may contain the rheology modifier in an amount of the range of 0.1 to 5 wt. % (weight percent) relative to the total weight of the OBM.
Claims18
An invert oil-based mud (OBM), comprising:
- an oleaginous continuous phase;
- an aqueous internal phase;
- an emulsifier;
- and
- a rheology modifier that comprises one or more of the group consisting of epoxidized methyl oleate, epoxidized methyl linoleate, and epoxidized methyl α-linolenate.
A method of using an invert oil-based mud (OBM) in a wellbore, comprising:
- introducing the invert OBM into the wellbore, the invert OBM comprising an oleaginous continuous phase;
- an aqueous internal phase;
- an emulsifier;
- and a rheology modifier that comprises one or more selected from the group consisting of epoxidized methyl oleate, epoxidized methyl linoleate, and epoxidized methyl alpha-linolenate.
A method of preparing an invert oil-based mud (OBM), comprising:
- forming a rheology modifier by epoxidizing linseed oil and transesterifying the epoxidized linseed oil with methanol;
- and
- mixing the rheology modifier with an emulsifier, an oleaginous phase, and an aqueous phase.
Dependencies are inferred from the claim text.