Cationic acrylamide emulsion polymer brine thickeners

Patent · Tue Dec 02 04:00:00 EST 1986

OSTI ID:7041319

Gleason, P A; Piccoline, M A

This patent describes a thickened, solids free, aqueous drilling and servicing brine having a density of at least 14.4 ppg. comprising (a) an aqueous solution of at least one water-soluble salt of a multivalent metal, and (b) a cationic water-in-oil emulsion polymer of acrylamide or methacrylamide and a cationic monomer selected from the group consisting of a dialkylaminoalkyl acrylamide or methacrylamide, a trialkylaminoalkyl acrylamide or methacrylamide, a trialkylaminoalkyl acrylate or methacrylate, and a dialkyldialkyl ammonium halide. The acrylamide or methacrylamide to cationic monomer molar ratio of the polymer is about 70:30 to 95:5, the polymer having an I.V. in 1.0N KCl of about 1.0 to 7.0 dl/g and being present in a compatible and viscosifying amount; the thickened brine characterized by being substantially non-dilatent.

• Assignee: National Starch and Chemical Corp., Bridgewater, NJ
• Patent Number(s): US 4626363
• OSTI ID: 7041319
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ACRYLAMIDE
ADDITIVES
AMIDES
AMMONIUM COMPOUNDS
AMMONIUM HALIDES
AQUEOUS SOLUTIONS
BRINES
CARBOXYLIC ACID SALTS
COLLOIDS
DENSITY
DISPERSIONS
DRILLING FLUIDS
EMULSIONS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
METHACRYLATES
MIXTURES
MONOMERS
NATURAL GAS WELLS
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PETROLEUM
PHYSICAL PROPERTIES
POLYMERS
QUANTITY RATIO
SOLUBILITY
SOLUTIONS
VISCOSITY
WATER
WELL SERVICING
WELLS