Water-based drilling fluids having enhanced fluid loss control

Patent · Tue Mar 24 04:00:00 EST 1987

OSTI ID:6892687

Slingerland, R E

This patent describes an additive for a water base drilling fluid comprising a polymer complex. The polymer complex is the reaction product of a dispersant selected from the group consisting of lignite, sulfonated lignite, lignosulfonate, and sulfoalkylated lignite, and salts thereof, and a water-soluble sufonated polystyrene having a molecular weight of at least 70,000 and containing from 0.7 to 2.0 sulfonic acid groups per styrene unit.

• Assignee: NL Industries, Inc., New York, NY
• Patent Number(s): US 4652606
• OSTI ID: 6892687
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ADDITIVES
ALKYLATED AROMATICS
ALKYLATION
AROMATICS
BROWN COAL
CARBOHYDRATES
CARBONACEOUS MATERIALS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COAL
CONTROL
DRILLING FLUIDS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
HYDROCARBONS
HYDROGEN COMPOUNDS
LIGNIN
LIGNITE
LOSSES
LOST CIRCULATION
MATERIALS
MOLECULAR WEIGHT
NATURAL GAS WELLS
OIL WELLS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYMERS
POLYOLEFINS
POLYSACCHARIDES
POLYSTYRENE
POLYVINYLS
SACCHARIDES
SOLUBILITY
STYRENE
SULFONATION
SULFONIC ACIDS
SURFACTANTS
SYNTHETIC MATERIALS
WATER
WELLS
YIELDS