Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
Reexamination Certificate
2007-11-20
2007-11-20
Gulakowski, Randy (Department: 1712)
Earth boring, well treating, and oil field chemistry
Earth boring
Contains organic component
C507S137000, C507S139000, C507S140000, C166S282000
Reexamination Certificate
active
10905983
ABSTRACT:
A method and drilling fluid additive composition are provided for reducing lost circulation and seepage loss when synthetic or oil based drilling fluid is used. The method includes injecting drilling fluid and 1 to 50 pounds per barrel of a loss control additive having a composition comprising 20 to 80 parts by weight fibrous particles, 10 to 40 parts by weight lignite, and 10 to 40 parts by weight phenol-formaldehyde resin.
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Figueroa John J.
Gulakowski Randy
Lundeen Daniel N.
Lundeen & Dickinson LLP
Turbo-Chem International, Inc.
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