Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
Reexamination Certificate
2008-09-19
2010-11-02
Kugel, Timothy J. (Department: 1796)
Earth boring, well treating, and oil field chemistry
Earth boring
Contains organic component
C175S057000, C175S065000, C175S066000, C507S112000, C507S139000, C507S140000, C507S141000
Reexamination Certificate
active
07825072
ABSTRACT:
An inhibitive water-based polymer mud system and method for using the system in drilling and in stabilizing wellbores is disclosed for use in water sensitive formations as an alternative to oil-based muds. The system comprises a substantially non-ionic low molecular weight polyacrylamide in combination with a substantially non-ionic high molecular weight polyacrylamide, preferably long chain alcohol or an amine or silicate shale inhibitor, and poly anionic cellulose.
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Carbajal David L.
Ezell Ryan G.
Shumway William
Halliburton Energy Service,s Inc.
Kugel Timothy J.
Roddy Craig W.
Tripp Karen
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