US 2022/0089932 A1 · Improved Invert Emulsifier For Use in Invert Emulsion Drilling Fluids

Abstract

An oil soluble invert emulsifier and a process for preparation thereof, including invert emulsion drilling fluid compositions and their use, are described. The oil soluble invert emulsifier is synthesized from fatty acid reaction with polyalkylene polyamines and unsaturated mono carboxylic acids. The emulsifier is further modified with multivalent alkali metal salts. The emulsifier stabilizes the invert emulsion drilling fluid at temperatures exceeding 400° F. and imparts improved fluid properties.

Claims19

Dependent claims

A zwitterionic imidazoline invert emulsifier for use in invert emulsion drilling fluids, said emulsifier being a reaction product of a fatty acid, a poly-alkylene polyamine and an unsaturated mono carboxylic acid and having a formula:

wherein
R1 is an alkyl radical derived from the fatty acid;
R2 is a NH2, NHCOR1, OH, OCOR1 polyalkylene polyamine derived from the poly-alkylene polyamine;
and
R3 is an alkanediyl radical derived from the unsaturated mono-carboxylic acid containing 3-8 carbon atoms.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/476,042Filed 15 Sep 2021

Priority

IN 20202104052118 Sep 2020

Published

24 Mar 2022

Term ends

Not estimatedThe source records don’t support an estimate.

Classification3 codes

C09K 8/36
Non-aqueous well-drilling compositions, e.g. oil-based: water-in-oil emulsions
C09K 8/035
Specific additives for general use in well-drilling compositions: organic additives
C09K
Materials for miscellaneous applications, not provided for elsewhere

Improved Invert Emulsifier For Use in Invert Emulsion Drilling Fluids

Life of this patent

Improved Invert Emulsifier For Use in Invert Emulsion Drilling Fluids

Life of this patent

Abstract

Claims19