Terpolymers for use as high temperature fluid loss additive and rheology stabilizer for high pressure, high temperature oil well drilling fluids
Patent
·
OSTI ID:5588433
Novel water-soluble terpolymers comprising: 2-acrylamido-2-methylpropanesulfonic acid, sodium salt (AMPS) N-vinylpyrrolidone, and acrylonitrile These terpolymers provide high temperature fluid loss additives and rheology stabilizers for high calcium-containing brine clay drilling fluids.
- Assignee:
- Nalco Chemical Company
- Patent Number(s):
- US 4502965
- OSTI ID:
- 5588433
- Country of Publication:
- United States
- Language:
- English
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