Resumen de Patentes
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7/30/2019 Resumen de Patentes
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BUSCADOR PATENTE QUIN LA USARESUMEN
WIPO
(World Intellectual
Property
Organization)
STABILITY ENHANCED WATER-
IN-OIL EMULSION AND
METHOD FOR USING SAME
International Patent
Classification:
C09K 8/36 (2006.01); C09K
8/58 (2006.01); C09K 8/588
(2006.01)
EXXONMOBIL UPSTREAM
RESEARCH COMPANY
[US/US]; P.O Box 2189
Houston, TX 77252-2189
(US) (for all designated
states)
A method for enhancing the stability of a water-in-oil emulsion pretreating at least a portion of the
oil prior to emulsification. The pretreatment step may consist of adding polymers to t he oil,
biotreating the oil, photochemically treating the oil, or combinations thereof. The emulsion may be
used in various enhanced oil recovery methods including using the emulsion as
a flooding agent to displace hydrocarbons in a subterranean formation, and using the emulsion as a
barrier fluid for diverting flow
of fluids in the formation.
WIPO
(World IntellectualProperty
Organization)
A METHOD FOR PREPARINGA CONCENTRATED STABLEWATER-IN-OIL EMULSIONCONTAINING AT LEAST 40WEIGHT PERCENT OF AWATER-SOLUBLE POLYMER
(EP0153506)
DOW CHEMICAL CO This invention is directed to a met hod for preparing a concentrated stable water-in-oil emulsioncontaining at least 40 weight percent of a water-soluble polymer, which method comprises as steps
of (1) forming a stable water-in-oil emulsion containing at least one water-soluble monomer in an
aqueous phase which is dispersed in a continuous oil phase, said emulsion of monomer containing
an emulsifying amount of a water-in-oil emulsifier; (2) subjecting said paper, emulsion of monomer
to conditions sufficient to polymerize the monomer t hereby forming a stable water-in-oil
preconcentrate emulsion of a water-soluble polymer; and (3) concentrating said preconcentrate
emulsion by removing at least a portion of the water from the p erconcentrate emulsion. The
invention is characterized in that prior to or during step (3), an inverting surfactant is added in an
amount sufficient to reduce the bulk viscosity of the preconcentrate emulsion, but less than thatwhich destabilizes the preconcentrate emulsion or the concentrated emulsion. The concentrated
emulsions prepared by the process of this i nvention are superior to conventional emulsions in that
they have increased polymer solids, reduced oil content, lower bulk viscosity and greater stability
than are characteristic in the conventional emulsions containing about 30 weight percent of solids.
In addition to their utility as additives in drilling muds, fracturing fluids and fluid mobility control
agents in enhanced oil recovery methods, the emulsions prepared by the process of the present
invention are also useful as flocculating agents for sewages, industrial wastes, mining streams such
as coal slurries and mining effluents, as thickeners for coating formulations and as additives for the
manufacture of paper.
EUROPEAN
PATENT OFFICE
OIL-IN-WATER-IN-OILEMULSION
US2008108527
EXXONMOBILUPSTREAM RESEARCH
COMPANY
An oil-in-water-in-oil emulsion (O/W/O) comprising a first oil-in-water emulsion
dispersed in a second oil, and a method of preparing the same. The O/W/O
emulsion can be used as a drive fluid in an enhanced oil recovery process. TheO/W/O emulsion of this invention may also be used as a lubricant, and has the
beneficial property of being resistant to shear forces.