Drilling fluid systems with improved fluid loss properties

Details Drilling fluid systems with improved fluid loss properties Drilling fluid systems with improved fluid loss properties

2002-05-01

2008-10-21

Mayes, Melvin C (Department: 1791)

Earth boring, well treating, and oil field chemistry

Earth boring

Contains organic component

C507S121000, C507S906000

Reexamination Certificate

active

07439209

ABSTRACT:
A drilling fluid system comprising a brine and a quantity of cationic copolymers comprising a ratio of acrylamide monomers to cationic derivatives of acrylamide monomers, wherein the quantity and the ratio are effective to maintain effective rheology and fluid loss control in said drilling fluid system at temperatures of at least about 250° C. for at least about 16 hours.

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