Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
Reexamination Certificate
2005-12-22
2009-08-18
Seidleck, James (Department: 1796)
Earth boring, well treating, and oil field chemistry
Earth boring
Contains organic component
C507S108000, C507S120000, C507S121000, C507S122000, C507S127000, C507S128000, C507S129000, C507S134000, C507S135000
Reexamination Certificate
active
07576039
ABSTRACT:
Subject matter of the present invention is a drilling fluid additive based on sulfonated asphalt, which comprises a water soluble and anionic polymer component in quantities of 0.1 to 20 wt. %, with respect to the total additive in addition to the asphalt component. With this additive the water solubility of sulfonated asphalt can be markedly increased. This additive, whose polymer component is thermally highly stable, is utilized primarily in water- and/or oil-based drilling fluids and in particular in the exploration of subterraneous petroleum and natural gas deposits. Typical polymer components to consider are representatives of polycondensation products, such as phenol resins, ketone resins and sulfonated naphthalene, acetone and amino plasticizer resins (for example urea and melamine resins).
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Heidlas Jürgen
Huber Johann
Keilhofer Gregor
Lange Peter
Plank Johann
BASF Construction Polymers GmbH
Figueroa John J
Fulbright & Jaworski L.L.
Seidleck James
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