Oil well drilling fluids with improved anti-settling properties

Details Oil well drilling fluids with improved anti-settling properties Oil well drilling fluids with improved anti-settling properties

1997-10-01

2000-12-12

Kelly, C. H.

Earth boring, well treating, and oil field chemistry

Earth boring

Contains organic component

507140, C09K 700

Patent

active

061599069

ABSTRACT:
An improved drilling fluid with enhanced anti-settling properties useful for oil well drilling systems is described. The invention includes a process for providing anti-settling properties to oil invert (i.e., water in oil emulsion) based fluids. The drilling fluid/drilling mud invention contains at least one copolymer reaction product of which the reactants comprise at least one ethylenically unsaturated carboxylic compound and at least one alpha-olefin. As an alternative embodiment one or more rheologically-active clays including organoclays and smectite clays in combination with such copolymer reaction product are also added to the drilling fluid. The invention also includes an anti-settling additive comprising a rheologically active clay and the above described copolymer.

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