Shear thickening compositions containing polyacrylic acid and polyacrylamide, their preparation and use

Patent · Tue Aug 04 04:00:00 EDT 1987

OSTI ID:6184966

Eustace, D J; Siano, D B; Drake, E N; Calcavecchio, P

A process is described for plugging a portion of a well bore using a shear-thickening composition and a emulsion spacer where a conduit, which contains a fluid, extends down into a well bore from the surface to at least that portion to be plugged and where the shear-thickening composition comprises a water-in-oil emulsion having particles of hydratable, water-expandable clay dispersed in the continuous oily phase. The oily phase comprises a hydrocarbon liquid having a surfactant dissolved in which surfactant comprises a polyamine attached to an oil solubilizing hydrocarbon with or without an intervening bridging group and where the dispersed aqueous phase of the emulsion comprises an aqueous polymer solution, having a pH below 7, of both a polyacrylic acid and polyacrylamine. The spacer comprises a water-in-oil emulsion having a composition similar to the water-in-oil emulsion of the shear-thickening composition and each droplet of dispersed aqueous phase of the shear-thickening composition is encapsulated in a film which forms as a result of the interaction of the polyacrylic acid, surfactant and polyacrylamide.

• Assignee: Exxon Research and Engineering Co., Florham Park, NJ
• Patent Number(s): US 4683953
• OSTI ID: 6184966
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ACRYLIC ACID
AQUEOUS SOLUTIONS
CARBOXYLIC ACIDS
CHEMICAL PREPARATION
CLAYS
COLLOIDS
DISPERSIONS
DISPLACEMENT FLUIDS
EMULSIONS
FLUIDS
MIXING
MIXTURES
MONOCARBOXYLIC ACIDS
NATURAL GAS WELLS
OIL WELLS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PH VALUE
PLUGGING
PLUGGING AGENTS
POLYAMIDES
POLYMERS
PUMPING
QUANTITY RATIO
SHEAR
SOLUTIONS
SURFACTANTS
SYNTHESIS
WELLS