4. Earth boring, well treating, and oil field chemistry
  5. Preventing contaminant deposits in petroleum oil conduits

Donald A. Thorssen

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Fire retarded solvents

Compositions – Fire retarding
Patent

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Oil and gas well operation fluid used for the solvation of waxes

Earth boring – well treating – and oil field chemistry – Preventing contaminant deposits in petroleum oil conduits
Patent

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Oil and gas well operation fluid used for the solvation of waxes

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

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Water-based drilling fluid deacidification process and apparatus

Boring or penetrating the earth – Processes – Boring with specific fluid
Patent

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