# US 10,308,865 B2 · Polysaccharide coated nanoparticle compositions comprising ions

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- Number: US 10,308,865 B2
- Document ID: US10308865B2
- Status: Granted
- Kind: B2
- Application number: 16/035,033
- Filed: 2018-07-13
- Published: 2018-11-08
- Granted: 2019-06-04
- Earliest claimed: 2015-07-13
- Assignees: Saudi Arabian Oil Company
- Applicants: Saudi Arabian Oil Company
- Inventors: Jason R. Cox; Hooisweng Ow; Shannon L. Eichmann; Howard K. Schmidt
- Web page: https://patentgrep.com/patent/US10308865B2

## CPC

- C09K 8/588: characterised by the use of specific polymers {(polymeric surfactants C09K8/584)}
- C09K 8/03: Specific additives for general use in well-drilling compositions
- C09K 8/42: Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells (compositions for plastering C09K8/50)
- C09K 8/44: containing organic binders only
- C09K 8/516: characterised by their form or by the form of their components, e.g. encapsulated material
- C09K 8/52: Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K 8/70: characterised by their form or by the form of their components, e.g. foams
- C09K 8/72: Eroding chemicals, e.g. acids
- C09K 8/92: characterised by their form or by the form of their components, e.g. encapsulated material (C09K8/70 takes precedence)
- E21B 21/003: {Means for stopping loss of drilling fluid (plastering the borehole wall E21B33/138)}
- E21B 33/14: for cementing casings into boreholes
- E21B 37/00: Methods or apparatus for cleaning boreholes or wells (E21B21/00 takes precedence)
- C09K 2208/10: Nanoparticle-containing well treatment fluids
- E21B 43/26: by forming crevices or fractures
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS

## Abstract

A composition including a coated nanoparticle including a nanoparticle and a cross-linked carbohydrate-based coating and an ion selected from the group consisting of Li+, Na+, K+, Rb+, Cs+, Be2+, Mg2+, Sr2+, Ba2+, and mixtures thereof; methods of making and using the composition; and systems including the composition.

## Claims

### Claim 1

A nanoparticle composition for treatment of a subterranean formation, the nanoparticle composition comprising:
a coated nanoparticle comprising a nanoparticle and a cross-linked carbohydrate-based coating, wherein the cross-linked carbohydrate-based coating is the reaction product of a cross-linking reaction between an epoxide-based compound and a carbohydrate; and
an ion selected from the group consisting of Li+, Na+, K+, Rb+, Cs+, Be2+, Mg2+, Ca2+, Sr2+, Ba2+, and mixtures thereof.

### Claim 2 (depends on 1)

The nanoparticle composition of claim 1, wherein the composition further comprises a downhole fluid.

### Claim 3 (depends on 1)

The nanoparticle composition of claim 1, wherein the nanoparticle is a metal oxide nanoparticle selected from an iron oxide nanoparticle, a nickel oxide nanoparticle, and a cobalt oxide nanoparticle.

### Claim 4 (depends on 1)

The nanoparticle composition of claim 1, wherein the nanoparticle comprises a metal oxide comprising an atom selected from the group consisting of Zn, Cr, Co, Dy, Er, Eu, Gd, Gd, Pr, Nd, In, Pr, Sm, Tb, Tm, and combinations thereof.

### Claim 5 (depends on 1)

The nanoparticle composition of claim 1, wherein the nanoparticle is a superparamagnetic nanoparticle.

### Claim 6 (depends on 5)

The nanoparticle composition of claim 5, wherein the superparamagnetic nanoparticle comprises an iron oxide nanoparticle.

### Claim 7 (depends on 1)

The nanoparticle composition of claim 1, wherein the nanoparticle has an average particle size of about 10 nm to about 1,000 nm.

### Claim 8 (depends on 1)

The nanoparticle composition of claim 1, wherein the cross-linked carbohydrate-based coating comprises a carbohydrate selected from the group consisting of a monosaccharide, an oligosaccharide, a polysaccharide, and combinations thereof.

### Claim 9 (depends on 1)

The nanoparticle composition of claim 1, wherein the cross-linked carbohydrate-based coating comprises a polysaccharide.

### Claim 10 (depends on 9)

The nanoparticle composition of claim 9, wherein the polysaccharide is dextran.

### Claim 11 (depends on 10)

The nanoparticle composition of claim 10, wherein the dextran has a number average molecular weight of about 1,000 MW to about 150,000 MW.

### Claim 12 (depends on 1)

The nanoparticle composition of claim 1, wherein the epoxide-based compound is selected from the group consisting of is one or more selected from the group consisting of a polyethylene glycol diglycidyl ether, an epichlorohydrin, a 1,4-butanediol diglycidyl ether, an ethylene glycol diglycidyl ether, a 1,6-hexanediol diglycidyl ether, a propylene glycol diglycidyl ether, a poly(propylene glycol)diglycidyl ether), a poly(tetramethylene glycol)diglycidyl ether, a neopentyl glycol diglycidyl ether, a polyglycerol polyglycidyl ether, a diglycerol polyglycidyl ether, a glycerol polyglycidyl ether, a trimethylpropane polyglycidyl ether, a 1,2-(bis(2,3-epoxypropoxy)ethylene), a pentaerythritol glycidyl ether, a pentaerythritol polyglycidyl ether, a sorbitol polyglycidyl ether, and mixtures thereof.

### Claim 13 (depends on 1)

The nanoparticle composition of claim 1, wherein the epoxide-based compound is pentaerythritol glycidyl ether.

### Claim 14 (depends on 1)

The nanoparticle composition of claim 1, wherein the cross-linked carbohydrate-based coating is a reaction product of quenching reaction between the cross-linked carbohydrate-based coating and an amine-functionalized compound.

### Claim 15 (depends on 14)

The nanoparticle composition of claim 14, wherein the amine-functionalized compound has the structure:
wherein at each occurrence R1 at is independently selected from —H, —OH, or a substituted or unsubstituted (C1-C10)hydrocarbyl.

### Claim 16 (depends on 14)

The nanoparticle composition of claim 14, wherein the amine-functionalized compound is 2-amino-2-hydroxymethyl-propane-1,3-diol.

### Claim 17 (depends on 1)

The nanoparticle composition of claim 1, wherein the coated nanoparticle has a hydrodynamic diameter of about 10 nm to about 150 nm.

### Claim 18 (depends on 1)

The nanoparticle composition of claim 1, wherein the coated nanoparticles of the composition have a hydrodynamic diameter of less than about 100 nm after heating at 90° C. in seawater for 7 days.