Water-based drilling fluids having enhanced fluid loss control

Patent · Tue Mar 17 04:00:00 EST 1987

OSTI ID:6670891

Slingerland, R E

A water base drilling fluid is described comprising a mixture of water and 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 sulfonated polystyrene having a molecular weight of at least 70,000 and containing 0.7 to 2.0 sulfonic acid groups per styrene unit. The polymer complex has a weight ratio of dispersant to sulfonated polystyrene of from 30:1 to 1:30.

• Assignee: NL Industries, Inc., New York, NY
• Patent Number(s): US 4650593
• OSTI ID: 6670891
• Country of Publication: United States
• Language: English

Related Subjects

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