# US 10,308,859 B2 · Methods and compositions for use in oil and/or gas wells

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- Number: US 10,308,859 B2
- Document ID: US10308859B2
- Status: Granted
- Kind: B2
- Application number: 16/016,967
- Filed: 2018-06-25
- Published: 2018-10-25
- Granted: 2019-06-04
- Earliest claimed: 2013-03-14
- Assignees: Flotek Chemistry, LLC
- Applicants: Flotek Chemistry, LLC
- Inventors: Lakia M. Champagne; Angus Fursdon-Welsh; Nathan L. Lett; Maria Elizabeth Green
- Web page: https://patentgrep.com/patent/US10308859B2

## CPC

- C09K 8/36: Water-in-oil emulsions
- C09K 8/26: Oil-in-water emulsions
- C09K 8/40: Spacer compositions, e.g. compositions used to separate well-drilling from cementing masses
- 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 8/584: characterised by the use of specific surfactants
- C09K 8/602: {containing surfactants}
- C09K 8/62: Compositions for forming crevices or fractures
- E21B 43/16: Enhanced recovery methods for obtaining hydrocarbons
- 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

Methods and compositions comprising an emulsion or a microemulsion for use in various aspects of the life cycle of an oil and/or gas well are provided. In some embodiments, the emulsion or the microemulsion comprises water, a solvent, and a surfactant, and optionally, one or more additives.

## Claims

### Claim 1

An emulsion or a microemulsion composition for use in an oil and/or gas well having a wellbore, wherein the emulsion or the microemulsion composition comprises:
water;
a solvent; and
a surfactant, wherein the surfactant has a structure as in Formula I:
wherein each of R7, R8, R9, R10, and R11 are the same or different and are selected from the group consisting of hydrogen, optionally substituted alkyl, and CH═CHAr, provided at least one of R7, R8, R9, R10, and R11 is —CH═CHAr;
Ar is an aryl group;
R12 is hydrogen or alkyl;
n is 1-100; and
m is 1.

### Claim 2 (depends on 1)

The composition as in claim 1, wherein the surfactant comprises a styrylphenol ethoxylate surfactant.

### Claim 3 (depends on 1)

The composition as in claim 1, wherein R7 is —CH═CHAr.

### Claim 4 (depends on 1)

The composition as in claim 1, wherein R8 is —CH═CHAr.

### Claim 5 (depends on 1)

The composition as in claim 1, wherein R9 is —CH═CHAr.

### Claim 6 (depends on 1)

The composition as in claim 1, wherein R10 is hydrogen.

### Claim 7 (depends on 1)

The composition as in claim 1, wherein R11 is hydrogen.

### Claim 8 (depends on 1)

The composition as in claim 1, wherein R12 is hydrogen.

### Claim 9 (depends on 1)

The composition as in claim 1, wherein n=10.

### Claim 10 (depends on 1)

The composition as in claim 1, wherein R12 is a C1-6 alkyl.

### Claim 11 (depends on 1)

The composition as in claim 1, wherein R12 is methyl or ethyl.