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.