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US 2026/0218037 A1Published application
Compositions and methods of removing iron sulfide scales from low pressure gas wells
AssigneeSaudi Arabian Oil Company
InventorsQiwei Wang, Jairo Leal Jauregui, Tao Chen, Husain H. Bar, Waleed K. Khnaifir
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Abstract
Described herein is a composition which includes a foaming agent, and one or more of an iron sulfide dissolver and a corrosion inhibitor. The composition is capable of reducing a bulk density and hydrostatic pressure of a fluid in a low-pressure gas well. Also described herein are methods of removing an iron sulfide scale from a low-pressure gas well using the composition.
Claims20
A composition comprising:
- a foaming agent, and one or more chemicals selected from the group consisting of an iron sulfide dissolver, and a corrosion inhibitor;
- wherein the composition is capable of reducing a bulk density and hydrostatic pressure of a fluid in a low-pressure gas well.
A method of removing an iron sulfide scale from a low-pressure gas well, the method comprising:
- introducing, separately or together, a foaming agent, and one or more chemicals selected from the group consisting of an iron sulfide dissolver, and a corrosion inhibitor, into a bottom of a low-pressure gas well comprising a fluid to form a mixture;
- contacting the mixture with the iron sulfide scale present in the low-pressure gas well, thereby dissolving at least a portion of the iron sulfide scale in the mixture;
- and
- removing the at least a portion of the iron sulfide scale dissolved in the mixture by withdrawing the mixture from the low-pressure gas well.
1 more element
Dependencies are inferred from the claim text.