Drilling fluids made from solid, free-flowing, continuously-made

Details Drilling fluids made from solid, free-flowing, continuously-made Drilling fluids made from solid, free-flowing, continuously-made

1984-03-21

1986-10-21

Guynn, Herbert B.

Compositions

Leather or fur treating

252 8514, C09K 702

Patent

active

046184341

ABSTRACT:
A polyvinyl alcohol-aldehyde reaction product is produced continuously in a rotating contactor by contacting solid particles of polyvinyl alcohol with the aldehyde in an acidic aqueous salt solution. The product can be dried and then sieved to remove oversize particles. A preferred aldehyde is either formaldehyde or glutaraldehyde which reacts with the polyvinyl alcohol to produce a reaction product that can be used as a fluid loss control agent in oil fields.

REFERENCES:
patent: 4240915 (1980-12-01), Block
patent: 4349443 (1982-09-01), Block
patent: 4353804 (1982-10-01), Green et al.

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