# US 10,501,682 B2 · Polysaccharide coated nanoparticle compositions comprising ions

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- Number: US 10,501,682 B2
- Document ID: US10501682B2
- Status: Granted
- Kind: B2
- Application number: 16/295,816
- Filed: 2019-03-07
- Published: 2019-07-04
- Granted: 2019-12-10
- 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/US10501682B2

## 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+, Ca2+, Sr2+, Ba2+, and mixtures thereof; methods of making and using the composition; and systems including the composition.

## Claims

### Claim 1

A method of treating a subterranean formation, the method comprising:
placing in a subterranean formation a nanoparticle composition comprising:
a coated nanoparticle comprising an iron oxide nanoparticle and a cross-linked carbohydrate-based coating comprising dextran, pentaerythritol glycidyl ether, and 2-amino-2-hydroxymethyl-propane-1,3-diol; and
an ion comprising Ca2+,
wherein the dextran is cross-linked by pentaerythritol glycidyl ether.