The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 29, 2021
Filed:
Sep. 18, 2015
Statoil Petroleum As, Stavanger, NO;
Marcus Fathi, Stavanger, NO;
Siddhartha Francois Lunkad, Stavanger, NO;
STATOIL PETROLEUM AS, Stavanger, NO;
Abstract
There is provided a method of chemically removing iron-containing casing from a well bore comprising injecting an acidic solution into said well bore, wherein said solution contacts said iron-containing casing and thereby accelerates oxidation of iron to iron cations, allowing said iron cations to dissolve in said solution, and removing said solution from said well bore. There is further provided a batch method of removing iron-containing casing from a well bore comprising injecting an acidic solution into said well bore, wherein said acidic solution contacts said iron-containing casing and thereby accelerates oxidation of iron to iron cations, and allowing said iron cations to dissolve in said acidic solution, wherein said well bore is at least partially open to the atmosphere.