06339048 is referenced by 33 patents.

This invention is of a drilling fluid composition containing a liquid thixotrope, which thixotrope is free of solvents or any other diluent, and is in easily usable, liquid form, pourable at ambient temperatures, and which provides effective and efficient rheological properties when used at low levels in such compositions. In a specific aspect, the invention provides an oil or oil invert emulsion drilling fluid composition containing one or more organoclays, and in addition contains a additive which comprises the reaction product of an alkoxylated nitrogen containing compound or a diamine, and one or more polycarboxylic acids in a specified equivalent ratio.

Title
Oil and oil invert emulsion drilling fluids with improved anti-settling properties
Application Number
9/470973
Publication Number
6339048 (B1)
Application Date
December 23, 1999
Publication Date
January 15, 2002
Inventor
Keith McNally
Bedminster
NJ, US
Mahalingam Santhanam
Plainsboro
NJ, US
Agent
Michael J Cronin
US
Assignee
Elementis Specialties
NJ, US
IPC
C09K 7/06
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