Shear thickening compositions containing polyacrylic acid and polyacrylamide, their preparation and use
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
- Resource Relation:
- Patent File Date: Filed date 14 Mar 1985
- Country of Publication:
- United States
- Language:
- English
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Plugging wellbores
Shear thickening fluid
Related Subjects
03 NATURAL GAS
NATURAL GAS WELLS
PLUGGING
OIL WELLS
PLUGGING AGENTS
CHEMICAL PREPARATION
ACRYLIC ACID
AQUEOUS SOLUTIONS
CLAYS
DISPLACEMENT FLUIDS
EMULSIONS
MIXING
PH VALUE
POLYAMIDES
PUMPING
QUANTITY RATIO
SHEAR
SURFACTANTS
CARBOXYLIC ACIDS
COLLOIDS
DISPERSIONS
FLUIDS
MIXTURES
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
SOLUTIONS
SYNTHESIS
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing