The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 18, 2008
Filed:
Nov. 27, 2002
Jeffrey Thompson, East Windsor, NJ (US);
David Dino, Cranbury, NJ (US);
Richard Jobbins, Freehold, NJ (US);
Mark Matyi, Jr., North Hanover, NJ (US);
Jeffrey Thompson, East Windsor, NJ (US);
David Dino, Cranbury, NJ (US);
Richard Jobbins, Freehold, NJ (US);
Mark Matyi, Jr., North Hanover, NJ (US);
Elementis Specialties, Inc., Hightstown, NJ (US);
Abstract
The invention is of oil-based drilling fluids including invert emulsion fluids that are able to maintain a relatively consistent rheological profile over a wide temperature range. The invention also includes new additives that enable the preparation of drilling fluids with viscosities that are less affected by temperature over a temperature range from less than about 40° F. to more than about 250° F. compared to conventional fluids. These additives are based on reaction products of polyamines and carboxylic acids with two or more carboxylic moieties combined with alkoxylated amines and fatty acid amides. In addition, this invention permits the use of reduced amounts of organoclay rheological additives in drilling fluids.