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Drilling mud additives and in adding viscosification additives t

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

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Drilling mud compositions

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

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Drilling mud comprising tetrapolymer consisting of N-vinyl-2-pyr

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

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Drilling mud comprising tetrapolymer consisting of n-vinyl-2-pyr

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

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Drilling muds effective at high temperature

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

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Drilling processes and fluid used in well drilling applications

Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
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Dry mix for water based drilling fluid

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

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