Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
Reexamination Certificate
2008-04-01
2008-04-01
Gulakowski, Randy (Department: 1796)
Earth boring, well treating, and oil field chemistry
Earth boring
Contains organic component
C507S107000, C507S108000, C507S120000, C507S206000, C507S207000, C507S225000, C166S305100
Reexamination Certificate
active
10904537
ABSTRACT:
A drilling fluid or mud additive having several components, including leonardite (humic acid); potassium acetate; partially hydrolyzed polyacrylamide (PHPA); polyanionic cellulose polymer (PAC); sulfonated asphalt; sulfoalkylated tannin; polystyrene maleic anhydride copolymer; micronized cellulose fiber; and calcium carbonate. These components are preferably premixed in a dry formulation as a powder or as pellets, and shipped to the site in bags or bulk tanks. This offers substantial advantages over the prior art in that the drilling mud of the present invention may be formed simply by adding the dry mix to a predetermined amount of water, and is thus much easier to make than the prior art wet mix drilling fluids, which typically require precise ratios of several different powders and liquids to be mixed together. Hydration buffers help keep the powder or pellets dry and flowable.
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Figueroa John J.
Gulakowski Randy
Roy, Kiesel, Keegan & DeNicola
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