Inhibitive water-based drilling fluid system and method for...

Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component

Reexamination Certificate

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C175S065000, C507S225000, C507S925000

Reexamination Certificate

active

07439210

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 non-ionic low molecular weight polyacrylamide in combination with a non-ionic high molecular weight polyacrylamide, preferably long chain alcohol and poly anionic cellulose.

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