Compositions, systems, and methods for removing iron sulfide scale from oilfield components using methyl acrylate

Patent metadata

Field	Value
Publication number	US-2018072940-A1
Application number	US-201515560033-A
Country	US
Kind code	A1
Filing date	Apr 20, 2015
Priority date	Apr 20, 2015
Publication date	Mar 15, 2018
Grant date	—

Abstract

The present disclosure relates to compositions, systems and methods for removing iron sulfide scale from a solid object, such as an oilfield component. The compositions include a carbon-carbon (C—C) double bond with an electron withdrawing group bonded to at least one of the double-bonded carbons.

First claim

1 . A method of removing iron sulfide scale from an oilfield component with iron sulfide scale, the method comprising applying to the oilfield component a removal material comprising methyl acrylate or a methyl-acrylate containing composition in an amount and for a time sufficient to remove iron sulfide scale from the oilfield component.

2 . The method of claim 1 , wherein the methyl acrylate-containing composition has the general structural formula:

3 . The method of claim 1 , wherein the removal material further comprises a polar solvent.

4 . The method of claim 1 , wherein the removal material further comprises an additional composition able to remove iron sulfide scale from the oilfield component.

5 . The method of claim 1 , wherein at least 80% of the iron sulfide scale is removed from the oilfield component.

6 . The method of claim 1 , wherein applying occurs in a sealed container.

7 . The method of claim 1 , further comprising recovering the removal material.

8 . The method of claim 1 , wherein the oilfield component comprises a perforation, a casing, a production tubular, a valve, a pump, or downhole completion equipment with iron sulfide scale.

9 . A system for removing iron sulfide scale from an oilfield component with iron sulfide scale, the system comprising:
a removal material comprising comprising methyl acrylate or a methyl-acrylate containing composition; and a system for applying the removal material to the oilfield component in an amount and for a time sufficient to remove iron sulfide scale from the oilfield component.

10 . The system of claim 9 , wherein the methyl acrylate-containing composition has the general structural formula:

11 . The system of claim 9 , wherein the removal material further comprises a polar solvent.

12 . The system of claim 9 , wherein the removal material further comprises an additional composition able to remove iron sulfide scale from the oilfield component.

13 . The system of claim 9 , wherein at least 80% of the iron sulfide scale is removed from the oilfield component.

14 . The system of claim 9 , wherein the system for applying the removal material comprises a sealed container.

15 . The system of claim 9 , wherein the system for applying the removal material further comprises a subsystem for recovering the removal material.

16 . The system of claim 9 , wherein the oilfield component comprises a perforation, a casing, a production tubular, a valve, a pump, or downhole completion equipment with iron sulfide scale.

17 . The system of claim 9 , wherein the oilfield component comprises a tubular and the system for applying the removal material to the oilfield component comprises a container to house the removal material and a connector to supply the removal material to the tubular.

18 . The system of claim 17 , wherein the container is a pressurized container.

19 . The system of claim 9 , wherein the oilfield component is placeable in a container and the system for applying the removal material to the oilfield component comprises a sealed container in which the oilfield component is placed, a container housing the removal material, and a connector to supply the removal material to the sealed container.

20 . The system of claim 19 , wherein the container housing the removal material is a pressurized container.

Assignees

• Halliburton Energy Services Inc

Inventors

• Peng Yang
• Yue Zhiwei
• Zhao Funian
• Shi Liu
• Hoppe Ronald Larry
• Qu Liangwei
• Fan Chunfang

Classifications

• C01G49/12

  Sulfides {(C01G49/0018 takes precedence)} · CPC title

• E21B37/00

  Methods or apparatus for cleaning boreholes or wells (E21B21/00 takes precedence) · CPC title

• C09K2208/20

  Hydrogen sulfide elimination · CPC title

• C09K8/532 Primary

  Sulfur · CPC title

• C23G1/24

  with neutral solutions · CPC title