Jeffrey R Thompson, Age 6525 Equestrian Dr, Wallkill, NY 12589

2019037, Dec 12, 2019

Jun 6, 2018

16/001290

- East Windsor NJ, US
Gabriela Barbara BER - Asbury Park NJ, US
Wouter IJDO - Yardley PA, US
Edward MAGAURAN - Westampton NJ, US
Jeffrey THOMPSON - Hightstown NJ, US

Elementis Specialties, Inc. - East Windsor NJ

C09K 8/36

An oil-based drilling fluid and a method for maintaining viscosity of an oil-based drilling fluid over a temperature range of about 120 F. to about 40 F. The oil-based drilling fluid comprises a quaternary ammonium ion having a corresponding quaternary ammonium salt having a neat shear strength value less than 6000 lb/100 ft. The organoclay drilling fluid additive imparts a first high shear viscosity to the oil-based drilling fluid at temperatures of 40 F. or less and imparts a second high shear viscosity to the oil-based drilling fluid at temperatures greater than or equal to 120, wherein the difference between the first high shear viscosity and the second high shear viscosity is less than 110%. The organoclay drilling fluid additive, further imparts a first low shear viscosity to the oil-based drilling fluid at temperatures of 40 F. or less and imparts a second low shear viscosity to the oil-based drilling fluid at temperatures greater than or equal to 120 F., wherein the difference between the first low shear viscosity and the second low shear viscosity is less than 50%. The quaternary ammonium salt may be selected from dimethyl dicoco ammonium salt; dimethyl dicoco ammonium chloride; dimethyl didecyl ammonium salt; dimethyl didecyl ammonium chloride and combinations thereof.