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Aqueous drilling fluids containing fluid loss additives

Patent ·
OSTI ID:6738975
;
This patent describes an aqueous clay containing drilling fluid having present in an amount sufficient to reduce fluid loss of the drilling fluid, a copolymer of (1) from about 80% to about 98% by weight of acrylic acid and (2) from about 2% to about 20% by weight of itaconic acid. The copolymer has a weight average molecular weight of between about 50,000 to about 1,000,000, being in its free acid or partially or completely neutralized salt form and being at least water dispersible.
Assignee:
Diamond Shamrock Chemicals Co., Dallas, TX
Patent Number(s):
US 4647384
OSTI ID:
6738975
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ACRYLIC ACID
ADDITIVES
AQUEOUS SOLUTIONS
CARBOXYLIC ACIDS
CHEMICAL COMPOSITION
CLAYS
COPOLYMERS
DICARBOXYLIC ACIDS
DISPERSIONS
DRILLING FLUIDS
FLUIDS
HYDROGEN COMPOUNDS
ITACONIC ACID
MIXTURES
MONOCARBOXYLIC ACIDS
NATURAL GAS WELLS
OIL WELLS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
POLYMERS
QUANTITY RATIO
SOLUBILITY
SOLUTIONS
WATER
WELLS