4. Earth boring, well treating, and oil field chemistry
  5. Earth boring
  6. Contains organic component

Reginald Bell

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Biodegradable surfactant for invert emulsion drilling fluid

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

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Oil based well fluids with high solids content

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

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Profile ID: LFUS-PAI-P-2741870

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