Methods and compositions for use in oil and/or gas wells

Patent metadata

Field	Value
Publication number	US-9464223-B2
Application number	US-201414212650-A
Country	US
Kind code	B2
Filing date	Mar 14, 2014
Priority date	Mar 14, 2013
Publication date	Oct 11, 2016
Grant date	Oct 11, 2016

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.

First claim

What is claimed is:

1. A composition for use in an oil and/or gas well having a wellbore, comprising a fluid and an emulsion or microemulsion, wherein the emulsion or the microemulsion comprises:
water;
an alcohol;
a solvent comprising a terpene; and
a surfactant, wherein the surfactant has a structure as in Formula I:

wherein each of R 7 , R 8 , R 9 , R 10 , and R 11 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 R 7 , R 8 , R 9 , R 10 , and R 11 is —CH═CHAr;
Ar is an aryl group;
R 12 is hydrogen or alkyl;
n is 1-100; and
m is 1.

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

3. The composition as in claim 1 , wherein R 7 is —CH═CHAr.

4. The composition as in claim 1 , wherein R 8 is —CH═CHAr.

5. The composition as in claim 1 , wherein R 9 is —CH═CHAr.

6. The composition as in claim 1 , wherein R 10 is hydrogen.

7. The composition as in claim 1 , wherein R 11 is hydrogen.

8. The composition as in claim 1 , wherein R 12 is hydrogen.

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

10. The composition as in claim 1 , wherein the alcohol comprises isopropanol.

11. The composition as in claim 1 , wherein the terpene is d-limonene.

12. The composition as in claim 1 , wherein the terpene is a citrus terpene.

13. The composition as in claim 1 , wherein the terpene is dipentene.

14. The composition as in claim 1 , wherein R 12 is a C 1-6 alkyl.

15. The composition as in claim 1 , wherein R 12 is methyl or ethyl.

Assignees

• Flotek Chemistry Llc

Inventors

• Champagne Lakia M
• Fursdon-Welsh Angus
• Lett Nathan L
• Green Maria Elizabeth

Classifications

• C09K8/36 Primary

  Water-in-oil emulsions · CPC title

• C09K8/584

  characterised by the use of specific surfactants · CPC title

• C09K8/602 Primary

  containing surfactants · CPC title

• C09K8/62

  Compositions for forming crevices or fractures · CPC title

• C09K8/26

  Oil-in-water emulsions · CPC title