Patent ID: 9127192
Filing Date: 2015-09-08
Classification: C09K,E21B

Abstract:
1. A method for drilling in a subterranean formation comprising: providing or using in the drilling an invert emulsion drilling fluid consisting essentially of an oleaginous continuous phase, a non-oleaginous discontinuous phase, and a hydrophobic amine additive having the following general structure: where R is a hydrophobic or partially hydrophobic group with carbon atoms ranging from about 16 to about 54, straight chained or branched, and aliphatic, cycloaliphatic or aryl aliphatic; N is a primary, secondary or tertiary amine wherein the R 1 and R 2 groups may be the same or different, and are selected from the group consisting of a hydrogen group, an alkyl group, a cyano alkyl group, an amino alkyl group, an amino aryl group, a hydroxyl alkyl group, a carbonyl group, a carbonate group, an alkoxy group, a hydroxyl group, any combination thereof, and any derivative thereof; X comprises a hydrophilic group selected from the group consisting of: a primary amine, a secondary amine, a tertiary amine, an amide group, an amine oxide group, a betaine group, an ester group, a carboxylic acid group, an ether group, a hydroxyl group, a phosphate group, a phosphonate group, a pyrrolidone group, a haloformyl group, a nitrate group, a nitrite group, a sulfate group, a sulfonate group, a imidazoline group, a pyridine group, a sugar group, any combination thereof, and any derivative thereof, wherein when the drilling fluid is heated to 120 (±2)° F., and the plastic viscosity of the drilling fluid is tested at 120 (±2)° F., the drilling fluid with the hydrophobic amine additive shows an increase in plastic viscosity of 60% or less, when compared to the drilling fluid without the hydrophobic amine additive, and the drilling fluid with the hydrophobic amine additive has a characteristic selected from the group consisting of: an increased yield point; an increased low shear yield point; an increased gel strength; and any combination thereof.