Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
Reexamination Certificate
2011-06-07
2011-06-07
Kugel, Timothy J. (Department: 1765)
Earth boring, well treating, and oil field chemistry
Earth boring
Contains organic component
C507S129000, C507S138000
Reexamination Certificate
active
07956015
ABSTRACT:
A method of providing a substantially constant rheological profile of a drilling fluid over a temperature range of about 120° F. to about 40° F. includes adding a drilling fluid additive to the drilling fluid, wherein the drilling fluid additive includes the reaction product of a carboxylic acid with at least two carboxylic moieties; and a polyamine having an amine functionality of two or more. A composition, such as an oil based drilling fluid, includes the reaction product of a carboxylic acid with at least two carboxylic moieties and a polyamine having an amine functionality of two or more.
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Elementis Specialties, Inc.
Kugel Timothy J.
Morgan & Lewis & Bockius, LLP
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